高度通用 DC DC 转换器 LT3957
半桥式DC-DC变换器的系统
（4）半桥式变换器 由两个电容器和两个开关管组成两个桥，桥的对角线接变压 器的原边绕组，故称半桥变换器。半桥式变换器减小了原边开关管的电压应力，结构 简单 ，功率器件少，所以在中小功率场合得到广泛应用。 本文设计电路将 400V 恒定直流输入变为 5V 稳定直流输出，输出功率较低，所以 我们采用半桥式变压器。 1.3 本文研究的内容 本文研究的内容主要包括： (1) 研究半桥式 DC-DC 电力变换电路的工作原理。 (2) 研究 PWM 调制方法的机理和半桥式 DC-DC 变换电路的控制方法。 (3) 设计从 400V 到 5V 的半桥式 DC-DC 变换器。 (4) 采用 MATLAB 工具对所设计系统进行仿真研究。
1 绪 论
1.1 研究背景 随着科技的发展，在人们的日常生活中，电力已成为与生产生活息息相关的一部 分，在各个场合，人们都需要各式各样的电力来为其服务，然而并不是所有的电力都 能在一开始就能满足需要，于是就要求有电力变换的过程。 直流- 直流变换器 （DC-DC） 作为一种应用广泛变换器广泛应用于远程及数据通讯、 计算机、办公自动化设备、工业仪器仪表、军事、航天等领域，涉及到国民经济的各 行各业。按额定功率的大小来划分，DC-DC 可分为 750W 以上、750W～1W 和 1W 以 下 3 大类。 进入 20 世纪 90 年代， DC-DC 变换器在低功率范围内的增长率大幅度提高， 其中 6W～25W DC-DC 变换器的增长率最高，这是因为它们大量用于直流测量和测试 设备、计算机显示系统、计算机和军事通讯系统。由于微处理器的高速化，DC-DC 变 换器由低功率向中功率方向发展是必然的趋势，所以 251W～750W 的 DC-DC 变换器 的增长率也是较快的，这主要是它用于服务性的医疗和实验设备、工业控制设备、远 程通讯设备、多路通信及发送设备，DC-DC 变换器在远程和数字通讯领域有着广阔的 应用前景。 DC-DC 变换器将一个固定的直流电压变换为可变的直流电压，这种技术被广泛应 用于无轨电车、地铁、列车、电动车的无级变速和控制，同时使上述控制具有加速平 稳、快速响应的性能，并同时收到节约电能的效果。用直流斩波器代替变阻器可节约 20％～30％的电能。直流斩波器不仅能起到调压的作用(开关电源)，同时还能起到有效 抑制电网侧谐波电流噪声的作用。 DC/DC 变换器现已商品化，模块采用高频 PWM 技术，开关频率在 500kHz 左右, 功率密度为 0.31W/cm3～1.22W/cm3。随着大规模集成电路的发展，要求电源模块实现 小型化，因此就要不断提高开关频率和采用新的电路拓扑结构。目前，已有一些公司 研制生产了采用零电流开关和零电压开关技术的二次电源模块，功率密度有较大幅度 的提高。 电子产业的迅速发展极大地推动了开关电源的发展。高频小型化的开关电源及其 技术已成为现代电子设备供电系统的主流。在电子设备领域中，通常将整流器称为一 次电源，而将 DC/DC 变换器称为二次电源。一次电源的作用是将单相或三相交流电网 变换成标值为 48V 的直流电源。目前，在电子设备中用的一次电源中，传统的相控式
迪伦电子TEN 30WI系列30W DC-DC转换器说明书
Features◆ Ultra wide 4:1 input voltage range ◆ Single output voltage modelsfrom 1.8 to 15 VDC◆ Dual output voltage models◆ Extended operating temperature range:–40°C to 85°C◆ Under voltage lockout ◆ Remote On/Off◆ Shielded metal case with insulatedbaseplate◆ Optional heatsink◆ Lead free design - RoHS compliant ◆ 3-year product warrantyDC/DC ConvertersTEN 30WI Series, 30 WattThe TEN 30WI series is a family of high performance 30W dc-dc converters fea-turing ultra wide 4:1 input voltage ranges in a compact low profile package with industry-standard footprint. A very high efficiency allows operating temperatures up to 85°C. A built-in filter for both input and output minimizes the need for external filtering. Further standard features include remote On/Off, output voltage trimming, over voltage protection, under voltage lockout and short circuit protection.Typical applications for these products are battery operated equipment and distrib-uted power architectures in communication and industrial electronics, everywhere where isolated, tightly regulated voltages are required and space is limited on the PCB.Input current at no load 1.8 Vout models:35 / 20 mA typ.(nominal input 24/48 Vin) 2.5/3.3 Vout models:40 / 25 mA typ.other models:70 / 45 mA typ.Input current at full load 1.8 Vout models:760 / 380 mA typ.(nominal input 24/48 Vin) 2.5/3.3 Vout models:1030 / 510 mA typ.other models:1500 / 750 mA typ.Input voltage variation (dv/dt) 5 V/ms, max.(complies with ETS 300 132 part. 4.4)Under voltage lockout 24 Vin models:7 VDC min. / 8 VDC typ. / 9.2 VDC max.48 Vin models:15 VDC min. / 16 VDC typ. / 17.5 VDC max. Surge voltage (100 msec. max.)24 Vin models:50 V max.48 Vin models:100 V max.Conducted noise (input)EN 55022 level A, FCC part 15, level A(with external components)Please refer to Application note: /overview/ten30wiESD (input)EN 61000-4-2, perf. criteria BFast transient (input)EN 61000-4-4, perf. criteria ASurge (input)EN 61000-4-5, perf. criteria BVoltage set accuracy ±1 %Output voltage adjustment ±10 %Regulation – Input variation Vin min. to Vin max. ±0.5 % max.– Load variation 10 – 100 %:single output models:±0.5 % max.dual output models:±1.0 % max. (balanced load)±5 % max. (Load cross variation 25 % / 100 %) Temperature coefficient ±0.02 %/KRipple and noise (20 MHz Bandwidth): 75 mVpk-pk max.Start up time (nominal Vin and constant resistive load)10 ms typ.Transient response setting time (25% load step change)300 µs typ.Short circuit protection indefinite (automatic recovery)Over load protection 150 % of Iout max typ. foldbackThermal shutdown at +115°C typOver voltage protection 1.8, 2.5 & 3.3 V output models: 3.9 V5.0 V output models:6.2 V12 V output models: 15 V15 V output models:18 VMinimum load (only for dual output models)10% of rated max current (operation at lower loadcondition will not damage these converters, however,they may not meet all listed specifications) Capacitive load 1.8 / 2.5 Vout models:65’000 µF max./ 33’000 µF max.3.3 / 5.0 Vout models:19’500 µF max./ 10’200 µF max.12 / 15 Vout models:3’300 µF max./ 1’100 µF max.±12 / ±15 Vout models:±1’000 µF max./ ±680 µF max. (per output)Temperature ranges – Operating–40°C to +85°C (with derating) – Case temperature +100°C max.– Storage–55°C to +105°C Thermal impedance – with heat-sink TEN-HS2 8.24 K/Watt– without heat-sink10 K/Watt Humidity (non condensing)95 % rel H max.Reliability, calculated MTBF (MIL-HDBK-217F , at +25°C, ground benign) >750’000 h Isolation voltage (60sec.) – Input / Output 1‘500 VDC Isolation resistance – Input / Output >1‘000 M Ohm Isolation capacitance – Input / Output 1000 pF max.Remote On/Off – On: 3.5 ... 12 VDC or open circuit.– Off:0 ... 1.2 VDC or short circuit pin 3 and pin 2– Off idle current: 3 mA typ.Switching frequency 300 kHz typ. (pulse width modulation PWM)Vibration10–55 Hz, 2G, 30 minutes along X,Y,Z Safety approvals UL 60950, IEC/EN 60950, complianceup to 60 VDC input voltage (SELV limit)– Certification documents /overview/ten30wi Environmental compliance – Reach /info/reach-declaration.pdf– RoHSRoHS directive 20011/65/EUTrim+VoutTrim- VoutTrim upRu [kohm]*output 1.8V 2.5V 3.3V 5.0V +5% 1.2 4.3 6.8 4.7+10% 0.068 0.82 1.5 0.56output 12V 15V ±12V ±15V +5% 47 47 27 33+10%8.2 6.8 2.2 2.7Trim downRu [kohm]* output 1.8V 2.5V 3.3V 5.0V –5% 1.8 6.8 8.2 5.6–10% 0.1 0.82 0.68 0.68output 12V 15V ±12V ±15V –5% 56 56 33 39–10%5.6 2.2 2.7 3.3*approximate valuesSupporting documents: /overview/ten30wiCasing material copper, nickel plated Baseplate material none conductive FR4Potting material epoxy (UL 94V-0 -rated)Weight48 g (1.69 oz)Soldering temperaturemax. 265°C / 10 sec.Heat-sink TEN-HS2Dimensions in [mm], () = InchPin diameter: 1.0 ±0.05 (0.02 ±0.002)Pin pitch tolerances: ±0.35 (±0.014)Case tolerances: ±0.5 (±0.02)Note:The product label on converter has to be removed before mounting the heat-sink. For volume orders converters will be supplied with heat-sinks already mounted. Please con-tact factory for quotation. Separate heat-sinks are only available for prototypes and small quantity orders.Order code: TEN-HS2 (cont.: heat-sink, thermal pad, 2 clamps)Material: Aluminum Finish: Anodic treatment (black)Weight: 19 g (0.67oz) (without converter)。
CC-E系列1 CC-E系列超紧凑型1.5W至25W单双路DC-DC转换器说明书
CC-E SeriesUltra Compact, 1.5W to 25W Single & Dual DC-DC ConvertersKey Market Segments & ApplicationsTelecommunications Instrumentation Datacom• Compact Footprint/Low Profile • Through Hole or SMT Versions • 5V, 12V, 24V & 48V Inputs• 3.3 to 30V 1Single, +12 to 15V Dual Outputs • Output Voltage Adjustment • Input - Output Isolation • RoHS Compliant • 5 Year WarrantyCC-E Features and BenefitsFeaturesBenefits• Compact• Less PCB Area Used• Self Contained• Requires No External Components • Multiple Input Voltage configurations • Easier System Configuration• Open Frame (no potting)• Lighter in Weight, Suitable for Surface Mount (R Version)SpecificationsNotes:1.For 24V/30V output - connect across +Vout & -Vout and leave "common out" pin not connected. 5. Not available on CC15 and CC25 models.2.Based upon equal load current from both outputs.3. For 15V output connect trim to -Vout.4.See Installation Manual for full specifications, test methods of parameters and application notes.Nominal Output Voltage V 3.3V5V 12/15V ±12/15 (24/30)1DC Input V 5V: 4.5-9.0V, 12V: 9-18V, 24V: 18-36V, 48V: 36-76VEfficiency%71 to 90% model dependant Output Voltage Tolerance % 1.5-10W: ±3%, 15-25W: ±5%Output Adjustment (via trim pin)V 3.15-3.6V (5) 4.75-6.0V 11.4-15V 22.8 - 30VLine Regulation mV 20 (40 CC15; 30 CC25)4080Load RegulationmV 40 (120 CC15; 200 CC25)1006002Temperature Coefficient %<± 0.02%/°C Preload-No preload requiredOutput RipplemV 40/12030/120(typ./max.BW 50MHz)Overcurrent Protection -Output current limiting with automatic recovery, shutdown CC15, 25 typeOvervoltage Protection -NoRemote On/ Off-CC1R5, 3, 6, & 10: RC terminal open, output is OFF; RC terminal to -Vin (0-0.4V), output is ONCC15 & CC25: RC terminal open, output is ON; RC terminal to +Vin, output is OFFOperating Temp.- Convection °C -40°C to +85°C, derates linearly to 40% load from +50°C to +85°COperating Temp.- Forced Air °C -40°C to +85°C with 1m/s air full loadStorage Temperature°C -40°C to +85°CHumidity (non Condensing)-95% RH max.(maximum wet-bulb temperature: +38°C)Isolation Voltage -500VAC 1 min. Input to output, input to case, output to case Isolation Resistance ΩInput to output, input to case, output to case: 50m Ωmin. (500VDC)Shockm/s 2980m/s 2(100G) 6ms (6 directions, each 3 times)Vibration (non Operating)-10 to 55Hz (sweep for 15min) 1.52mm constant, 3 directions X, Y, Z each 2 hoursSafety Agency Approvals -UL60950-1, CSA60950-1, EN60950-1Weightg CC1R5: 3.2, CC3: 4.5, CC6: 5.8, CC10:10.0, CC15: 12.5, CC25: 20.0Size (L x W x H)mmCC1R5: 16.51 x 16.61 x 8.51; CC3: 22.86 x 16.61 x 8.51; CC6: 22.86 x 21.11 x 8.51(Through Hole & SMD package)CC10: 35.56 x 22.61 x 8.51 CC15: 38.10 x 32.11 x 7.49; CC25: 43.21 x 44.91 x 7.49CC3: SIP type 27.69 x 9.19 x 17.91Warranty yrs5Model SelectorOutput Output OutputVoltage (V)Current (A)Power (W)5V Input12V Input24V Input48V Input Single Outputs3.30.4 1.5CC1R5-0503SF-E CC1R5-1203SF-E CC1R5-2403SF-E CC1R5-4803SF-E3.30.83CC3-0503SF-E CC3-1203SF-E CC3-2403SF-E CC3-4803SF-E3.3 1.26CC6-0503SF-E CC6-1203SF-E CC6-2403SF-E CC6-4803SF-E3.3 2.510CC10-0503SF-E CC10-1203SF-E CC10-2403SF-E CC10-4803SF-E3.34.515--CC15-2403SF-E-3.37.525--CC25-2403SF-E-50.3 1.5CC1R5-0505SF-E CC1R5-1205SF-E CC1R5-2405SF-E CC1R5-4805SF-E50.63CC3-0505SF-E CC3-1205SF-E CC3-2405SF-E CC3-4805SF-E5 1.05CC6-0505SF-E---5 1.26-CC6-1205SF-E CC6-2405SF-E CC6-4805SF-E5 2.010CC10-0505SF-E CC10-1205SF-E CC10-2405SF-E CC10-4805SF-E5 3.015--CC15-2405SF-E-5 5.025--CC25-2405SF-E-12(15)0.125(0.1) 1.5CC1R5-0512SF-E CC1R5-1212SF-E CC1R5-2412SF-E CC1R5-4812SF-E 12(15)0.25(0.2)3CC3-0512SF-E CC3-1212SF-E CC3-2412SF-E CC3-4812SF-E 12(15)0.5(0.4)6CC6-0512SF-E CC6-1212SF-E CC6-2412SF-E CC6-4812SF-E 12(15)0.8(0.64)10CC10-0512SF-E---12(15) 1.0(0.8)10-CC10-1212SF-E CC10-2412SF-E CC10-4812SF-E Dual Outputs±12 (15)30.06(0.05) 1.5CC1R5-0512DF-E CC1R5-1212DF-E CC1R5-2412DF-E CC1R5-4812DF-E ±12 (15)30.125(0.1)3CC3-0512DF-E CC3-1212DF-E CC3-2412DF-E CC3-4812DF-E ±12 (15)30.25(0.2)6CC6-0512DF-E CC6-1212DF-E CC6-2412DF-E CC6-4812DF-E ±12 (15)30.4(0.32)10CC10-0512DF-E---±12 (15)30.45(0.36)10-CC10-1212DF-E CC10-2412DF-E CC10-4812DF-EOptionsVersion DescriptionF-E Through hole mounting (DIP)R-E Surface mount (SMD)S-E Through hole mounting (SIP)(SIP option available for CC3 only)Pinout (CC1R5, 3, 6, and 10)Pin Single Dual1+Vin+Vin2RC RC3-Vin-Vin4NC-Vout5-Vout Common out6TRM TRM7+Vout+VoutFor CC15 and 25 see Installation Manual onlineCONNECTIONSCC1R5- S -ECC1R5- D -E1723564NC–Vout+VoutTRM RC+Vin–VinL o a dTERMINAL PIN CONFIGUTATIONNo.1+VinNo.2RC No.3–Vin No.4NC No.5–Vout No.6TRM No.7+Vout1723564COM –Vout+Vout TRM RC+Vin–VinL o a dL o a dTERMINAL PIN CONFIGUTATIONNo.1+Vin No.2RC No.3–Vin No.4–VoutNo.5Common out No.6TRMNo.7+VoutCONNECTIONS CC3- S -ECC3- D -E1723564NC–Vout+VoutTRM RC+Vin–VinL o a dTERMINAL PIN CONFIGUTATIONNo.1+Vin No.2RC No.3–Vin No.4NC No.5–Vout No.6TRM No.7+Vout1723564COM –Vout+Vout TRM RC+Vin–VinL o a dL o a dTERMINAL PIN CONFIGUTATIONNo.1+Vin No.2RC No.3–Vin No.4–VoutNo.5Common out No.6TRMNo.7+Vout CONNECTIONS CC6- S -ECC6- D -E1723564NC–Vout+VoutTRM RC+Vin–VinL o a dTERMINAL PIN CONFIGUTATIONNo.1+Vin No.2RC No.3–Vin No.4NC No.5–Vout No.6TRM No.7+Vout1723564COM –Vout+VoutTRM RC+Vin–VinL o a dL o a dTERMINAL PIN CONFIGUTATIONNo.1+Vin No.2RC No.3–Vin No.4–Vout No.5Common out No.6TRM No.7+Vout CONNECTIONSCC10- S -ECC10- D -E1723564NC–Vout+Vout TRM RC+Vin–VinL o a dTERMINAL PIN CONFIGUTATIONNo.1+Vin No.2RC No.3–Vin No.4NC No.5–Vout No.6TRM No.7+Vout1723564COM –Vout+VoutTRM RC+Vin–VinL o a dL o a dTERMINAL PIN CONFIGUTATIONNo.1+Vin No.2RC No.3–Vin No.4–VoutNo.5Common out No.6TRM No.7+VoutPin Out Diagrams CC-E SeriesCONNECTION1234567891017161514131211+Vout–Vout+Vin–VinRC L o a dTERMINAL PIN CONFIGUTATIONNo.1NC No.10NC No.2NC No.11NC No.3RC No.12+Vout No.4NC No.13+Vout No.5NC No.14+Vout No.6+Vin No.15–Vout No.7+Vin No.16–Vout No.8–Vin No.17NCNo.9–VinCONNECTION+Vout–Vout–Vin +Vin 45678910111213123252423222120191817161514RC L o a dTERMINAL PIN CONFIGUTATIONNo.1NC No.10+Vin No.19–Vout No.2NC No.11+Vin No.20–Vout No.3NC No.12+Vin No.21–Vout No.4RC No.13NC No.22–Vout No.5NC No.14NC No.23–Vout No.6NC No.15+Vout No.24–Vout No.7–Vin No.16+Vout No.25NCNo.8–Vin No.17+Vout No.9–Vin No.18+VoutCC25-xxxxSF-E (DIP TYPE)CC15-xxxxSF-E (DIP TYPE)CC-E June11 v3LOCAL DISTRIBUTIONTDK-LAMBDA EMEATDK-Lambda France SASRoute de Grivery ZAC des Delaches CS 4107791978 Courtaboeuf Cedex FranceTel:+33 1 60 12 71 65Fax:+33 1 60 12 71 66********************.com Italy Sales OfficeVia dei Lavoratori 128/13020092 Cinisello Balsamo (MI)ItalyTel:+39 02 61 29 38 63Fax:+39 02 61 29 09 00*************************.com TDK-Lambda Germany GmbHKarl-Bold-Strasse 4077855 Achern GermanyTel:+49 7841 666 0Fax:+49 7841 5000**************************.com Austria Sales OfficeAredstrasse 222544 Leobersdorf AustriaTel:+43 2256 655 84Fax:+43 2256 645 12**************************.comTDK-Lambda UK Ltd.Kingsley Avenue IlfracombeDevon EX34 8ES United KingdomTel:+44 (0) 12 71 85 66 66Fax:+44 (0) 12 71 86 48 94****************************.com Nemic Lambda Ltd.KibbutzGivat Hashlosha 48800IsraelTel:+9 723 902 4333Fax:+9 723 902 4777*************.il www.nemic.co.ilRussiaTechnical Support:St PetersburgTel:+7 (812) 6580463Sales:MoscowTel:+7 (499) 7557732******************www.tdk-lambda.ru。
松下汽车系统方案 (信息娱乐篇)
Codec
Audio Codec (MP3 / WMA / AAC)
Other
Audio IN : IIS × 8、SPDIF × 2ch、ADC × 4ch Audio OUT : IIS × 4、DAC × 6ch (24bit Audio DAC)
电源电压
1.2 / 3.3 V
¢ 应用例
CD
DARC DECODER
IBOC DECODER
MN103SL00SUB
CD Block
RF SERVO
DSP
DRAM 16Mbit
MP3/WMA AAC Dec.
AUDIO Back End
Digital Audio IF
ADC
Audio DSP
DAC
Digital Tuner
RADIO RF
IF处理
Radio DSP
RDS DEC
行必要的声控
• 通过与 MN66732UB 组合实现了两个调谐器系统 *1 将去除噪声等各种信号处理数字化 *2 与本公司上一代 LSI 相比较
4. 车载音响用统合 LSI (MN103SM50QUB)
¢ 概要
本 LSI ( 型号 : MN103SM50QUB) 是将车载音响的基本功能 [ 播放 CD / USB / AMFM 收音机 / 音响后端 (audio backend)] 集成为单芯 片的统合 LSI。通过将收音机前端 (Front End) (RF 电路 ) 完全单芯片化可以大幅度减少外围零部件。力图实现基板的省空间化，可以 廉价构筑车载音响系统。
2012
汽车系统方案
(信息娱乐篇)
AUTOMOTIVE
在家的感觉
家人和朋友欢聚的地方，让人身心放松的地方。 Panasonic 希望在世界每一个角落，都能帮助您营造这样充满快乐和欢声笑语的地 方。 快乐的梦想飞出家门，即使在车中，也能拥有 " 在家 " 的感觉，这就是我们的心愿。 Panasonic 在积累至今的电子技术基础上，将精益求精的质量和系统方案精心溶入 半导体器件中，提供给车载设备的相关客户，使其能够放心使用。 让每一位顾客，在车里都能感受到 " 在家 " 感觉 • • • 我们的努力，定将体现在您的 驾车旅程中。
5KW非隔离性光伏逆变器Boost电路及基于DSP的MPPT控制.
摘要在绿色再生能源得到广泛应用的今天，太阳能因为其独特的优势而得到青睐。
太阳能光伏发电受到世界各国的普遍关注，光伏并网发电也将成为太阳能利用的主要趋势，必将得到快速的发展。
但因为光伏电池的转化效率较低且输出特性受外界环境因素影响大，使光伏电池实时输出最大功率成为关键。
因此光伏最大功率跟踪也成为光伏发电系统的关键技术之一。
本文主要对光伏最大功率跟踪控制技术以及Boost（升压斩波电路）电路优化设计进行研究。
首先，对光伏电池的电气进行测量，得到了光伏电池的输出特性；采用基于Boost的实现方案，分析光伏最大功率跟踪的工作原理，进行DSP 单片机TMS320F2812实现扰动观察法的C语言编程。
最后进行样机组装并实验，实验证明，本设计能够完成对Boost电路的设计与优化，并能够较好的完成最大功率点跟踪。
关键词：光伏发电；最大功率跟踪；DSP；Boost电路；扰动观察ABSTRACTToday the green renewable energy is widely used , solar is favored because of its unique advantages. Solar photovoltaic power is widely concerned around the world, photovoltaic solar power generation will also become the main trend of development and also be rapid. But because of low conversion efficiency of photovoltaic cells and the output characteristics are affected by the environmental factors, making the largest power of photovoltaic cells real-time output the key. Therefore, the maximum power tracking of solar photovoltaic power generation system has also become one of the key technologies.In this paper, I will mainly research the maximum power tracking technology of the PV, design and improve the Boost circuit (Boost cut broken circuit). First, I measuring the electrical characteristics of photovoltaic cells , and get the output characteristics of photovoltaic cells; then based on Boost circuit of implementations, analysis the works of Photovoltaic maximum power tracking. Then, based an the DSP microcontroller TMS320F2812 , I use the method of perturbation and observation ,to do the programming based on C language.At last, I assembled the sample machine and did experiments, those experiments showed that the paper can accomplish the design and optimization of Boost circuit. And the experiments also showed that the design can complete the maximum power point tracking.Key words：PV；MPPT；DSP；Boost circuit；perturbation and observation目录摘要 (I)ABSTRACT (II)1 前言 (11)1.1 选题背景 (11)1.1.1 能源现状 (11)1.1.2 太阳能光伏发电 (11)1.2 本课题的研究意义和任务 (13)2单相光伏并网发电系统基本原理 (13)2.1 单相光伏并网发电系统结构组成 (14)2.2 主要部分工作原理 (15)2.2.1 DC-DC变换器 (15)2.2.2 DC-AC逆变器 (15)3 光伏电池的特性测量 (17)3.1 光伏电池的等效电路模型 (17)4 硬件电路设计 (17)4.1 Boost电路工作原理 (20)4.2 Boost电路实现光伏最大功率跟踪的理论依据 (21)4.3 Boost电路主要器件选择 (23)4.3.1 电感L (23)4.3.2 电容C (23)4.3.3 功率开关管V和二极管D (24)4.4 控制电路 (24)4.5 驱动电路 (24)4.6 缓冲电路 (25)4.7 检测采样电路 (29)4.7.1 电压采样电路 (30)4.7.2 电流采样电路 (31)4.8 液晶显示 (31)5 软件设计 (32)5.1 光伏最大功率跟踪控制方法 (32)5.2 光伏最大功率跟踪算法的实现 (33)5.3 系统调试实验及分析 (36)结论 (40)参考文献 (41)致谢 (42)附录A 硬件电路总图 (43)附录B 程序代码 (44)1前言1.1 选题背景1.1.1能源现状随着全球工业化进程的进一步深化，对于能源的消耗也在日益增加，而传统能源，像煤炭、石油、天然气储量有限，随着时间的推移，这些能源正在被加速消耗，全球正面临能源危机的挑战。
DC-DC可调升压模块 XL6009 4A电源模块稳压直流转换器
● 内置4A高效MOSFET开关管，使效率最高达94%；（LM2577电流仅3A）
● 超高开关频率400KHz，可以用小容量的滤波电容即能达到非常好的效果，纹波更小，体积更小。（LM2577频率仅50KHz）
技术参数：
型号规格
XL6009 升压模块
模块性质
非隔离升压（BOOST）
整流方式
非同步整流
输入范围
3V~32V
输出范围
5V~35V
输入电流
4A（最大），空载18mA（5V输入，8V输出，空载小于18mA。电压越高，空载电流越大。）
转换效率
<94%（压差越大，效率越低）
开关频率
400KHz
输出纹波
50mV（电压越高，电流越大，纹波越大）
输入7.4V 输出12V 1.5A 18W
输入12V 输出15V 2A 30W
输入12V 输出16V 2A 32W
输入12V 输出18V 1.6A 28.8W
输入12V 输出19V 1.5A 28.5W
效率90%
5 * 1 * 90% ＝ 10 * 0.45A
注意事项：
※本模块相对于LM2577的三极管推动方式转换效率更高
※本模块是可调的升压模块，可以通过调节模块上面的精密多圈可调电位器
来改变输出电压。最高输出电压为45V。顺时转降压，逆时转升压。
※模块上面标明的GND(输入负)，IN+(输入正)，GND(输出负)，OUT+(输出正)
XL6009 是一款4A开关电流的高性能升压（BOOST）模块。该模块使用第二代高频开关技术的XL6009E1为核心芯片，性能远超第一代技术的LM2577。XL6009升压模块成本更低，性能更卓越，LM2577模块即将被淘汰。
Orion-Tr DC DC 转换器商品说明书
Victron Energy B. V. | De Paal 35 | 1351 JG Almere | The Netherlands E-mail: *********************** Orion-Tr 24/12-20 (240 W)Victron Energy B. V. | De Paal 35 | 1351 JG Almere | The NetherlandsE-mail: ***********************Eingangsspannungsbereich (1) 8-17 V 8-17 V 16-35 V 16-35 V 16-35 V 32-70 V 32-70 V 32-70 V Abschalten wegen Unterspannung 7 V 7 V 14 V 14 V 14 V 28 V 28 V 28 V Neustart nach Unterspannung 7,5 V 7,5 V 15 V 15 V 15 V 30 V 30 V 30 V Nennwert Ausgangsspannung 12,2 V 24,2 V 12,2 V 24,2 V 48,2 V 12,2 V 24,2 V 48,2 V RegulierbarerAusgangsspannungsbereich 10-15 V20-30 V10-15 V20-30 V40-60 V10-15 V20-30 V40-60 VToleranz Ausgangsspannung +/- 0,2 VRauschen Ausgang2 mV rmsKont. Ausgangsstrom bei Nennwert Ausgangsspannung und 40 °C18 A 10 A 20 A 12 A 6 A 20 A 12 A 6 A Maximaler Ausgangsstrom (10 s) bei Nennwert Ausgangsspannung 25 A 15 A 25 A 15 A 8 A 25 A 15 A 8,0 A Kurzschluss Ausgangsstrom 40 A 25 A 50 A 30 A 25 A 50 A 30 A 25 A Kont. Ausgangsleistung bei 25 °C 280 W 280 W 300 W 320 W 320 W 280 W 320 W 320 W Kont. Ausgangsleistung bei 40 °C 220 W 240 W 240 W 280 W 280 W 240 W 280 W 280 W Wirkungsgrad87 % 88 % 88 % 89 % 89 % 87 % 89 % 89 % Kein Lasteingangslaststrom (2) < 80 mA< 100 mA< 100 mA< 80 mA< 120 mA< 80 mA< 80 mA< 80 mAStromverbrauch < 200 uA bei Deaktivierung über den Fernanschluss galvanische Trennung 200 VDC zwischen Eingang, Ausgang und Gehäuse Betriebstemperaturbereich -20 bis +55 °C (Minderung der Leistung 3 % pro °C über 40 °C)Feuchtemax. 95 % nicht kondensierendGleichstrom-AnschlussSchraubenklemmen Maximaler Querschnitt des Kabels 16 mm² A WG6 Gewicht1,3 kg (3 lb)Abmessungen HxBxT 130 x 186 x 70 mm (5,1 x 7,3 x 2,8 Zoll) Normen: Sicherheit Emission StörfestigkeitAutomobil-RichtlinieEN 60950EN 61000-6-3, EN 55014-1EN 61000-6-2, EN 61000-6-1, EN 55014-2ECE R10-5Eingangsspannungsbereich (1) 10-17 V 10-17 V 20-35 V 20-35 V 20-35 V 40-70 V 40-70 V 40-70 V Abschalten wegen Unterspannung 7 V 7 V 14 V 14 V 14 V 28 V 28 V 28 V Neustart nach Unterspannung 7,5 V 7,5 V 15 V 15 V 15 V 30 V 30 V 30 V Nennwert Ausgangsspannung12,2 V 24,2 V 12,2 V 24,2 V 48,2 V 12,2 V 24,2 V 48,2 V regulierbarer Ausgangsspannungsbereich 10-15 V20-30 V10-15 V20-30 V40-60 V10-15 V20-30 V40-60 VToleranz Ausgangsspannung +/- 0,2 V Rauschen Ausgang2 m V rmsKont. Ausgangsstrom bei Nennwert Ausgangsspannung und 40 °C30 A 15 A 30 A 17 A 8,5 A 30 A 16 A 8 A Maximaler Ausgangsstrom (10 s) bei Nennwert Ausgangsspannung 40 A 25 A 45 A 25 A 15 A 40 A 25 A 15 A Kurzschluss Ausgangsstrom 60 A 40 A 60 A 40 A 25 A 60 A 40 A 25 A Kont. Ausgangsleistung bei 25 °C 430 W 430 W 430 W 480 W 480 W 430 W 430 W 430 W Kont. Ausgangsleistung bei 40 °C 360 W 360 W 360 W 400 W 400 W 360 W 380 W 380 W Wirkungsgrad87 % 88 % 88 % 89 % 89 % 87 % 89 % 89 % Kein Lasteingangslaststrom (2) < 80 mA< 100 mA< 100 mA< 80 mA< 120 mA< 80 mA< 80 mA< 80 mAStromverbrauch < 200 uA bei Deaktivierung über den Fernanschluss galvanische Trennung 200 VDC zwischen Eingang, Ausgang und Gehäuse Betriebstemperaturbereich -20 bis +55 °C (Minderung der Leistung 3 % pro °C über 40 °C)Feuchtemax. 95 % nicht kondensierendGleichstrom-AnschlussSchraubenklemmen Maximaler Querschnitt des Kabels 16 mm² A WG6Gewicht12 V input und/oder 12 V output Modelle: 1,8 kg (3 lb) Andere Modelle: 1,6 kg (3,5 lb)Abmessungen HxBxT 12 V input und/oder 12 V output Modelle: 130 x 186 x 80 mm (5,1 x 7,3 x 3,2 Zoll)Andere Modelle: 130 x 186 x 70 mm (5,1 x 7,3 x 2,8 Zoll)Normen: Sicherheit Emission StörfestigkeitAutomobil-RichtlinieEN 60950EN 61000-6-3, EN 55014-1EN 61000-6-2, EN 61000-6-1, EN 55014-2ECE R10-51)Wenn die Ausgangsspannung auf nominal oder niedriger als nominal eingestellt wird, bleibt sie innerhalb des angegebenen Eingangsspannungsbereichs stabil (Buck-Boost-Funktion).Wenn die Ausgangsspannung um einen bestimmten Prozentsatz höher als der Nennwert eingestellt wird, steigt die minimale Eingangsspannung, bei der die Ausgangsspannung stabil bleibt (nicht sinkt), um den gleichen Prozentsatz.2)Stromverbrauch, wenn der Orion-Tr Ausgangsspannung erzeugt, aber keine Last anliegt.。
65E控制系列DC输入变速控制器产品说明书
1CONTROL DIMENSIONSSTANDARD FEATURES●Provides smooth variable speed capability for mobile equipment ●Maintains variable speed control as batteries discharge● Adjustable maximum speed, minimum speed, current limit, I.R. compensation, and accel ● Inhibit terminal permits optional start-stop without breaking battery lines ● Speed potentiometer, knob, and dialplate included●Increases range or running time of battery operated equipment through high efficiency● Automatic current limit foldback decreases current limit to 50% of setpoint when heatsink temperatures reach 80oC. - provides protection from overheatingWARRANTYDart Controls, Inc. (DCI) warrants its products to be free from defects in material and workmanship. The exclusive remedy for this warranty is DCI factory replacement of any part or parts of such product which shall within 12 months after delivery to the purchaser be returned to DCI factory with all transportation charges prepaid and which DCI determines to its satisfaction to be defective. This warranty shall not extend to defects in assembly by other than DCI or to any article which has been repaired or altered by other than DCI or to any article which DCI determines has been subjected to improper use. DCI assumes no responsibility for the design characteristics of any unit or its operation in any circuit or assembly. This warranty is in lieu of all other warranties, express or implied; all other liabilities or obligations on the part of DCI, including consequential damages, are hereby expressly excluded.NOTE: Carefully check the control for shipping damage. Report any damage to the carrier immediately. Do not attempt to operate the drive if visible damage is evident to either the circuit or to the electronic components.All information contained in this manual is intended to be correct, however information and data in this manual are subject to change without notice. DCI makes no warranty of any kind with regard to this information or data. Further, DCI is not responsible for any omissions or errors or consequential damage caused by the user of the product. DCI reserves the right to make manu-facturing changes which may not be included in this manual.MODEL WIDTHLENGTH DEPTH WEIGHTinches (centimeters)oz. (gms.)65E40 3.7 (9.40) 7.0 (17.8) 1.70 (4.32) 13.4 (379)65E606.7 (17.1)9.0 (22.9)2.27 (5.77)34.0 (962) TABLE OF CONTENTSWARRANTY ............................................................................................................................................................................... 1STANDARD FEATURES ............................................................................................................................................................ 1CONTROL DIMENSIONS .......................................................................................................................................................... 1MOUNTING DIMENSIONS ........................................................................................................................................................ 2INSTALLATION .......................................................................................................................................................................... 2HOOK-UP DIAGRAMS ........................................................................................................................................................... 2-3INHIBITING THE CONTROL .......................................................................................................................................................3TRIMPOT ADJUSTMENTS ..................................................................................................................................................... 3-4IN CASE OF DIFFICULTY ......................................................................................................................................................... 4MODEL SELECTION ................................................................................................................................................................. 4SPECIFICATIONS ...................................................................................................................................................................... 465E SERIES PARTS PLACEMENT & LIST ............................................................................................................................... 565E SERIES SCHEMATIC ......................................................................................................................................................... 6REPAIR PROCEDURE & PRODUCT LINE ......................................................................................................... BACK COVERTOP VIEWSIDE VIEW2Refer to the wiring diagrams below for proper connection of DC Voltage, Armature, and Speedpot wiring to the control. CAUTION !! TURN POWER OFF WHILE MAKING CONNECTIONS .To properly adjust the CURRENT LIMIT setting, a DC ammeter should be placed in series with the armature line. This meter can be removed after the control is adjusted.(continued)MOUNTING DIMENSIONSHOOK-UP DIAGRAMSINSTALLATIONBefore attempting to wire the control, make sure all power is disconnected. Recheck code designation to assure proper voltage is present for the control. Caution should be used in selecting proper size of hook-up wire for current and voltage drop. Note: the battery and armature wire size on 65E models must be a minimum of 12 gauge.SIDE VIEW TOP VIEWPot High (P2-1)Pot Wiper (P2-2)Pot Low (P2-3)Common (P2-4)Inhibit (P2-5)close = runPot High (P2-1)Pot Wiper (P2-2)Pot Low (P2-3)Common (P2-4)Inhibit (P2-5)SPST Switch open = run close = stopInhibit via speedpot - provides starting and stopping through accel/decel parametersUsing inhibit input - provide fast start-stop by bypassing accel/decel circuit5KýNote: Always use a shielded cable when connecting to the inhibit terminal. The shield of the cable should connect to the Common terminal of the control.65E SERIES HOOK-UP DIAGRAM3(continued on following page)(continued)INHIBITING THE CONTROLTRIMPOT ADJUSTMENTSBefore the power is applied, the speed potentiometer and trimpots should be preset as follows:TRIMPOT PRESET1. Preset speedpot fully CCW, preset Max trimpot CW 1/2 way, preset Current Limit trimpot fully CW, preset Min trimpot fullyC CW, preset Accel trimpot CW 1/2 way, preset I.R. trimpot fully CW.D C power can now be applied to the system and the control adjusted as directed below:TRIMPOT ADJUSTMENT2. Increase the MIN trimpot in a clockwise direction until the desired minimum speed is reached.3. Turn the Speedpot fully clockwise and adjust the MAX trimpot until the desired maximum speed is reached.65E4065E60Load current (continuous)40 amps60 ampsSpeed adjustment 5K Ω potentiometer or 0 to +10VDC input signal Speed range 30 : 1Overload capacity 200% for 10 seconds; 150% for one minuteCurrent limit adjustable 100% to 200% of full motor load, up to continuous current rating (page 4)Accelerationadjustable - 0 to 10 secondsDecelerationnon-adjustable - 0.5 secondsMaximum speed adjustable - 50 to 100% of base speed Minimum speed adjustable - 30% of max speedConnectionsbarrier terminal block (12Ga. to a maximum 6 Ga.)Speed regulation1% of base speed via adjustable I.R. Compensation trimpot Operating temperature -10°C to +45°C (14°F to 113°F)Package configuration black anodized aluminum extrusionInternal operating frequencyapproximately 1.6K Hertz Thermal protectionCurrent foldback at 80o C. heatsink temperature4SPECIFICATIONSINPUT VOLTAGE OUTPUT VOLTAGECONTINUOUS CURRENTMODEL NUMBER12 VDC ± 15%0 - 12 VDC 40 amps D.C. 65E40-12 12 VDC ± 15% 0 - 12 VDC 60 amps D.C. 65E60-12 24 VDC ± 15% 0 - 24 VDC 40 amps D.C. 65E40* 24 VDC ± 15% 0 - 24 VDC 60 amps D.C. 65E60* 36 VDC ± 15% 0 - 36 VDC 40 amps D.C. 65E40* 36 VDC ± 15%0 - 36 VDC60 amps D.C.65E60** 24 volt and 36 volt units with the same current ratings are interchangeable (ie. 24 volt unit will operate with 36 volt input and a 36 volt unit will operate with 24 volt input, same current rating).MODEL SELECTIONIN CASE OF DIFFICULTYIf a newly installed control will not operate, it is likely that a terminal or connection is loose. Check to make sure connections are(continued)4. Adjust the ACCEL trimpot to achieve the desired soft start time. CW rotation will increase accel time.5. Rotate the CURRENT LIMIT trimpot fully CCW until the motor begins to stall. Apply a full load to the motor. While motori s stalled adjust the CURRENT LIMIT trimpot CW until a desired current setting is obtained. 6. Adjust I.R. trimpot CW 1/2 way. If motor RPM is inconsistent (jumpy), rotate I.R. trimpot CCW until rotation is stable.5RESISTORSDIODESR1R2R3R4R5R6R7R8R9R10R11R12R13R14R15R16R17R18R19R20R21R22R23R24R25R26R27R28R29R30R31R32R33R34R35R36R37R38R39R40R41R42R43R44R45R46R47R48R49R50R51300& 5W 47K 470&47K 470&10K20K MAX 33K 220K 47K 10K 100K 10K 180K250K ACCEL 20K 1/4W 1%470K 300K 47K 5K MIN 82K 10K 4.7K 6.8K 10K 4.7K 47K 10K 300K20K CUR. LIM.4.7K5K I.R. COMP 100K 47K 2.7K 22&22&22&22&22&22&47K 1.2M 150&5K SPEEDPOT*22K 680K 2.7K 100K 100K 15KD1D2D3D4D5D6D71N40051N40051N5349B 1N963B 1N914B 1N5233B 1N914BACTIVE DEVICESQ1Q2Q3Q4Q5Q6Q7Q8Q9Q10IRFZ44IRFZ44IRFZ44IRFZ44IRFZ44IRFZ44IRFZ44IRFZ44IRFZ44IRFZ44CAPACITORSC1C2C3C4C5C6C7C8C9C10C11C12C13C14C15.1µF 63V .1µF 63V .22µF 100V .1µF 63V .1µF 63V .22µF 100V .1µF 63V .01µF 100V .01µF 100V 47µF 16V 1000µF 50V 1000µF 50V .1µF 63V .1µF 63V .01µF 100VIC PACKAGESU1U2U3U440106 IC LM324 IC LM324 IC LM358 ICMISCELLANEOUSPCBP1 (-1 thru -5)P2 (-1 thru -5)RL1RL2RL3SW1A-4-2519B PRINTED CIRCUIT BOARD 5 POS. TERMINAL BLOCK5 POS. BARRIER TERMINAL STRIP RLB2508X RAIL RLPRN910 RAIL RLB25011XB RAIL67F080 TEMP .SWITCH* SPEEDPOT IS MOUNTED REMOTENOTE: ALL RESISTORS 1/8W UNLESS NOTED OTHERWISE65E40/60-12CHANGES:R1R6R31R35R42R4810& 1W 22K 2.2K 1K 22K 1K65E40 / 65E60 PART PLACEMENT & LIST6R 4100In the event that a Product manufactured by Dart Controls Incorporated (DCI) is in need of repair service, it should be shipped, freight paid, to: Dart Controls, Inc., 5000 W. 106th Street, Zionsville, IN. 46077, ATTN: Repair Department. Please include Name, Shipping Address (no P .O. Box), Phone Number and if possible, e-mail address.Those orders received from anyone without an existing account with DCI must specify if they will be paying COD or Credit Card (Master Card/Visa/American Express). This information is required before work will begin. If you have an account with Dart your order will be processed according to the terms listed on your account. Products with Serial Number date codes over 5 years old will automatically be deemed Beyond Economical Repair (BER). A new, equivalent device will be offered at a substantial discount.Completed repairs are returned with a Repair Report that states the problem with the control and the possible cause. Repair orders are returned via UPS Ground unless other arrangements are made. If you have further questions regarding repair procedures, contact Dart Controls, Inc. at 317-873-5211.REPAIR PROCEDUREDart Controls, Inc.Man ufacturer of high quality DC an d AC motor speed con trols an d accessories since 1963.P .O. Box 105000 W. 106th Street Zionsville, Indiana 46077Phone: (317) 873-5211Fax: (317) 873-1105Indiana) production and headquarters facility - with over 2,000,000 variable speed units in the fi eld.In addition to the standard off-the-shelf products, you can select from a wide variety of options to customize controls for your specifi c application. For further information and application assistance, contact your local Dart sales representative, stocking distributor, or Dart Controls, Inc.Dart Controls, Inc. is a designer, manufacturer, and marketer of analog and digital electronic variable speed drives, controls, and accessories for AC, DC, and DC brushless motor applications.Shown above is just a sampling of the expanded line of Dart controls that feature the latest in electronic technology and engineering. Products are manufactured in the U.S.A. at our Zionsville (Indianapolis,YOUR MOTOR SPEED CONTROL SOLUTIONS PROVIDER700/COMMUTROL SERIESDC BRUSHLESS 5 & 20 Amp for 12,24,& 36VDC Inputs250G SERIESAC INPUT - VARIABLE DC OUTPUT1/50 HP through 2.0 HP65 SERIESDC INPUT - VARIABLE DC OUTPUT CURRENT RATINGS OF 20, 40, AND60 AMPSDM SERIESFIELD PROGRAMMABLE DIGITAL TACHOMETERMDP SERIESPROGRAMMABLE CLOSED LOOP DC SPEED CONTROL125D SERIESAC INPUT - VARIABLE DC OUTPUT1/50 HP through 1.0 HPISO9001:2008 REGISTERED。
LT1618 - 恒定电流 恒定电压 1.4MHz 升压型 DC DC 转换器 s
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利特 RT8509 3A 14V 升压 DC DC 转换器 数据手册说明书
RT8509®©Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.Ordering InformationNote :Richtek products are :` RoHS compliant and compatible with the current require-ments of IPC/JEDEC J-STD-020.` Suitable for use in SnPb or Pb-free soldering processes.Pin ConfigurationsWDFN-10L 3x3(TOP VIEW)3A, 14V Step-Up DC/DC ConverterGeneral DescriptionThe RT8509 is a high performance switching boost converter that provides a regulated supply voltage for active matrix thin film transistor (TFT) liquid crystal displays (LCDs).The RT8509 incorporates current mode, fixed-frequency,pulse width modulation (PWM) circuitry with a built in N-MOSFET to achieve high efficiency and fast transient response.The RT8509 has a wide input voltage range from 2.8V to 14V. In addition, the output voltage can be adjusted up to 24V via an external resistive voltage divider. The maximum peak current is limited to 4.5A (typ.). Other features include programmable soft-start, over voltage protection, and over temperature protection.The RT8509 is available in a WDFN-10L 3x3 package.Featuresz 90% Efficiencyz Adjustable Output Up to 24Vz 2.8V to 14V Input Supply Voltage z Input Supply Under Voltage Lockout z Fixed 1.2MHz Switching Frequency z Programmable Soft-Start z V OUT Over Voltage Protection z Over Temperature Protection z Thin 10-Lead WDFN PackagezRoHS Compliant and Halogen FreeApplicationszGIP TFT LCD PanelsMarking InformationH4= : Product CodeYMDNN : Date CodeTypical Application CircuitSS VIN VSUP LXLXOUT L1Package TypeQW : WDFN-10L 3x3 (W-Type)RT8509Lead Plating SystemG : Green (Halogen Free and Pb Free)RT8509©Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.Function Block DiagramLXSS GNDRT8509©Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.Electrical CharacteristicsRecommended Operating Conditions (Note 4)z Ambient T emperature Range -------------------------------------------------------------------------------------------- −40°C to 85°C zJunction T emperature Range --------------------------------------------------------------------------------------------−40°C to 125°CAbsolute Maximum Ratings (Note 1)z LX, VSUP to GND ---------------------------------------------------------------------------------------------------------−0.3V to 28V z VIN, EN to GND ------------------------------------------------------------------------------------------------------------−0.3V to 16.5V z Other Pins to GND --------------------------------------------------------------------------------------------------------−0.3V to 6.5V zPower Dissipation, P D @ T A = 25°CWDFN-10L 3x3-------------------------------------------------------------------------------------------------------------1.429W zPackage Thermal Resistance (Note 2)WDFN-10L 3x3, θJA -------------------------------------------------------------------------------------------------------70°C/W WDFN-10L 3x3, θJC -------------------------------------------------------------------------------------------------------8.2°C/W z Junction T emperature -----------------------------------------------------------------------------------------------------150°Cz Storage T emperature Range --------------------------------------------------------------------------------------------−65°C to 150°C z Lead Temperature (Soldering, 10sec.)--------------------------------------------------------------------------------260°C zESD Susceptibility (Note 3)HBM (Human Body Model)----------------------------------------------------------------------------------------------2kV MM (Machine Model)-----------------------------------------------------------------------------------------------------200VRT8509©Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.Note 1. Stresses beyond those listed “Absolute Maximum Ratings ” may cause permanent damage to the device. These arestress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may affect device reliability.Note 2. θJA is measured at T A = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7. θJC ismeasured at the exposed pad of the package.Note 3. Devices are ESD sensitive. Handling precaution is recommended.Note 4. The device is not guaranteed to function outside its operating conditions.RT8509©Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.Boost Reference Voltage vs. Input Voltage11.11.21.31.41.52468101214Input Voltage (V)B o o s t R e f e r e n c e V o l t a g e (V)Boost Current Limit vs. Input Voltage2345672468101214Input Voltage (V)B o o s tC u r r e n t L i m i t (A )Typical Operating CharacteristicsBoost Efficiency vs. Load Current5060708090100B o o s t E f f i c i e n c y (%)Boost Efficiency vs. Load Current5060708090100B o o s t E f f i c i e n c y (%)11.11.21.31.41.5-50-25255075100125Temperature (°C)B o o s t R e f e r e n c e V o l t a g e (V )90010001100120013001400-50-25255075100125Temperature (°C)B o o s t F r e q u e n c y (k H z )RT8509©Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.Application InformationThe RT8509 is a high performance step-up DC/DC converter that provides a regulated supply voltage for panel source driver ICs. The RT8509 incorporates current mode,fixed frequency, Pulse Width Modulation (PWM) circuitry with a built in N-MOSFET to achieve high efficiency and fast transient response. The following content contains detailed description and information for component selection.Boost RegulatorThe RT8509 is a current mode boost converter integrated with a 24V/3.5A power switch, covering a wide V IN range from 2.8V to 14V. It performs fast transient responses to generate source driver supplies for TFT LCD display. The high operation frequency allows use of smaller components to minimize the thickness of the LCD panel.The output voltage can be adjusted by setting the resistive voltage-divider sensing at the FB pin. The error amplifier varies the COMP voltage by sensing the FB pin to regulate the output voltage. For better stability, the slope compensation signal summed with the current sense signal will be compared with the COMP voltage to determine the current trip point and duty cycle.Soft-StartThe RT8509 provides soft-start function to minimize the inrush current. When powered on, an internal constant current charges an external capacitor. The rising voltage rate on the COMP pin is limited from V SS = 0V to 1.24V and the inductor peak current will also be limited at the same time. When powered off, the external capacitor will be discharged until the next soft-start time.The soft-start function is implemented by the external capacitor with a 5μA constant current charging to the soft-start capacitor. Therefore, the capacitor should be large enough for output voltage regulation. A typical value for soft-start capacitor is 33nF . The available soft-start capacitor range is from 10nF to 100nF.If C SS < 220pF , the internal soft-start function will be turned on and period time is approximately 1ms.OUT REF REF R1V = V x 1, where V = 1.25V (typ.)R2⎛⎞+⎜⎟⎝⎠The recommended value for R2 shoul d be at least 10k Ωwithout some sacrificing. Place the resistive voltage divider as close as possible to the chip to reduce noise sensitivity.Loop CompensationThe voltage feedback loop can be compensated with an external compensation network consisting of R3. Choose R3 to set high frequency integrator gain for fast transient response and C1 to set the integrator zero to maintain loop stability. For typical application, V IN = 5V,V OUT = 13.6V, C OUT = 4.7μF x 3, L1 = 4.7μH, while the recommended value for compensation is as follows :R3 = 56k Ω, C1 = 1nF.Over Current ProtectionThe RT8509 boost converter has over current protection to limit the peak inductor current. It prevents large current from damaging the inductor and diode. During the On-time,once the inductor current exceeds the current limit, the internal LX switch turns off immediately and shortens the duty cycle. Therefore, the output voltage drops if the over current condition occurs. The current limit is also affected by the input voltage, duty cycle, and inductor value.Over Temperature ProtectionThe RT8509 boost converter has thermal protection function to prevent the chip from overheating. When the junction temperature exceeds 155°C, the function shuts down the device. Once the device cools down by approximately 10°C, it will automatically restart to normal operation. To guarantee continuous operation, do not operate over the maximum junction temperature rating of 125°C.Inductor SelectionThe inductance depends on the maximum input current.As a general rule, the inductor ripple current range is 20%to 40% of the maximum input current. If 40% is selectedOutput Voltage SettingThe regulated output voltage is shown as the following equation :RT8509©Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.where η is the efficiency of the converter, I IN(MAX) is themaximum input current, and I RIPPLE is the inductor ripple current. The input peak current can then be obtained by adding the maximum input current with half of the inductor ripple current as shown in the following equation :PEAK IN(MAX)I 1.2 x I =Note that the saturated current of the inductor must be greater than I PEAK . The inductance can eventually be determined according to the following equation :2IN OUT IN 2OUT OUT(MAX)OSC x (V )x(V V )L 0.4 x (V )xI x f η−=where f osc is the switching frequency. For better system performance, a shielded inductor is preferred to avoid EMI problems.Diode SelectionSchottky diodes are chosen for their low forward voltage drop and fast switching speed. When selecting a Schottky diode, important parameters such as power dissipation,reverse voltage rating, and pulsating peak current should all be taken into consideration. A suitable Schottky diode's reverse voltage rating must be greater than the maximum output voltage and its average current rating must exceed the average output current. Last of all, the chosen diode should have a sufficiently low leakage current level, since it will increase with temperature.Output Capacitor SelectionThe output ripple voltage is an important index for estimating chip performance. This portion consists of two parts. One is the product of the inductor current with the ESR of the output capacitor, while the other part is formed by the charging and discharging process of the output capacitor. As shown in Figure 1, ΔV OUT1 can be evaluated based on the ideal energy equalization. According to the definition of Q, the Q value can be calculated as the following equation :IN L OUT IN L OUT IN OUT OUT1OUT OSC111Q x I I I I I I 222V 1x xC x V V f ⎡⎤⎛⎞⎛⎞=+Δ−+−Δ−⎜⎟⎜⎟⎢⎥⎝⎠⎝⎠⎣⎦=Δwhere f OSC is the switching frequency, and ΔI L is the inductor ripple current. Bring C OUT to the left side to estimate the value of ΔV OUT1 according to the following equation :OUTOUT1OUT OSC D x I V x C x f ηΔ=where D is the duty cycle and η is the boost converter efficiency. Finally, taking ESR into account, the overall output ripple voltage can be determined by the following equation :OUTOUT IN OUT OSC D x I V I x ESR x C x f ηΔ=+The output capacitor, C OUT , should be selected accordingly.TimeFigure 1. The Output Ripple Voltage without theContribution of ESRInput Capacitor SelectionLow ESR ceramic capacitors are recommended for input capacitor applications. Low ESR will effectively reduce the input voltage ripple caused by switching operation. A 10μF capacitor is sufficient for most applications.Nevertheless, this value can be decreased for lower output current requirement. Another consideration is the voltage rating of the input capacitor which must be greater than the maximum input voltage.OUT OUT(MAX)IN(MAX)IN RIPPLE IN(MAX)V x I I =x V I = 0.4 x I ηas an example, the inductor ripple current can be calculated according to the following equations :RT8509©Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.Thermal ConsiderationsFor continuous operation, do not exceed absolute maximum junction temperature. The maximum power dissipation depends on the thermal resistance of the IC package, PCB layout, rate of surrounding airflow, and difference between junction and ambient temperature. The maximum power dissipation can be calculated by the following formula :P D(MAX) = (T J(MAX) − T A ) / θJAwhere T J(MAX) is the maximum junction temperature, T A is the ambient temperature, and θJA is the junction to ambient thermal resistance.For recommended operating condition specifications, the maximum junction temperature is 125°C. The junction to ambient thermal resistance, θJA , is layout dependent. For WDFN-10L 3x3 packages, the thermal resistance, θJA , is 70°C/W on a standard JEDEC 51-7 four-layer thermal test board. The maximum power dissipation at T A = 25°C can be calculated by the following formula :P D(MAX) = (125°C − 25°C) / (70°C/W) = 1.429W for WDFN-10L 3x3 packageThe maximum power dissipation depends on the operating ambient temperature for fixed T J(MAX) and thermal resistance, θJA . The derating curve in Figure 2 allows the designer to see the effect of rising ambient temperature on the maximum power dissipation.Figure 2. Derating Curve of Maximum Power DissipationLayout ConsiderationsFor high frequency switching power supplies, the PCBlayout is important to get good regulation, high efficiency and stability. The following descriptions are the guidelines for better PCB layout.` For good regulation, place the power components asclose as possible. The traces should be wide and short enough especially for the high current output loop.` The feedback voltage divider resistors must be near thefeedback pin. The divider center trace must be shorter and the trace must be kept away from any switching nodes.` The compensation circuit should be kept away from thepower loops and be shielded with a ground trace to prevent any noise coupling.` Minimize the size of the LX node and keep it wide andshorter. Keep the LX node away from the FB.` The exposed pad of the chip should be connected to astrong ground plane for maximum thermal consideration.Figure 3. PCB Layout GuidePlace C 2 as close to VIN as possible.close to the IC as possible. The traces should be wide and short, especially for the high-current loop.The compensation circuit 0.00.20.40.60.81.01.21.41.60255075100125Ambient Temperature (°C)M a x i m u m P o w e r D i s s i p a t i o n (W )W-Type 10L DFN 3x3 PackageRichtek Technology Corporation5F, No. 20, Taiyuen Street, Chupei CityHsinchu, Taiwan, R.O.C.Tel: (8863)5526789Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. Customers should obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. Richtek cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek product. Information furnished by Richtek is believed to be accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Richtek or its subsidiaries.。
凌力尔特推出同步降压型DC／DC开关稳压控制器LTC3775
2018届高三英语8月月考试题本试卷分第Ⅰ卷（选择题）和第Ⅱ卷 (非选择题) 两部分，共8页。
满分120分，考试时间100分钟。
第Ⅰ卷第一部分阅读理解（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给四个选项中，选出最佳选项，并在答题卡上将该项涂黑。
AMany of us mistakenly believe that it's wrong to think we hav e any good qualities. We may spend a lot of time blaming our selves for our negative qualities, thinking that self criticism is t he key to improving our performance. However, a constant fo cus on our supposed shortcomings can stop our efforts to ma ke friends with other people. How can we believe that others c ould like us if we believe our inner being is flawed（有缺陷）?If someone seems to dislike you, the reason for that dislike might have little or nothing to do with you. The person who do esn't like you might be fearful, or shallow, or busy or shy. Perhaps you and that person are simply a mismatch for each other at this particular time.Don't take yourself out of the game by deciding that your fla ws are bigger than your good qualities. In fact, some of the ve ry qualities you consider to be flaws may be irresistible to som eone else. For all the factors that might cause one person to r eject you, there are at least as many factors that will work in y our favor with someone else.You might be thirty pounds over your ideal weight, but you m ay have a wonderful laugh and a real enthusiasm for life. Ther e are many people who don’t mind your extra pounds. You m ay drive a shabby car, but you might be a great dancer and a l oyal friend. There are people out there looking for loyalty, or f un, or sweetness, or wisdom, and the package it comes in is not important. If you are worried that you are not beautiful eno ugh to attract friends, keep in mind that not everyone is lookin g for physical beauty in their friends. You can decide to feel in ferior（自卑） because you don't have much money and you don't driv e a nice car. You can believe that this is the reason that you d on't have many friends in your life. On the other hand, if you a re very wealthy you may be suspicious that everyone is after your money and that nobody really likes you as a person.The point is that you can focus on just about anything and believe it's the reason you do not have friends and cannot make any.1. According to the author ___________ plays an important role in making friends.A. admitting your shortcomingsB. self criticismC. modestyD. confidence2. If you are not liked by a person, _________.A. you should find the reason in yourselfB. you’d better talk with the person face to faceC. you may not be the one to be blamedD. you and that person misunderstand each other3. We can learn from the third paragraph that ____________ .A. your good qualities may turn out to be your flawsB. your weakness may also be your strengths in some wayC. your negative qualities cause a person to reject youD. you’ll have few friends if your flaws are bigger than your go od qualities4. Which of the following is true according to the author?A. It is important to lose weight.B. It is easier for a wealthy person to make friends.C. Inner qualities are more important than physical appearanc e.D. If you are not beautiful enough, try to improve your physical beauty.BTired of Working in Your Country?With over 500 instructors and 20 years of experience, we are the leader in the field of teaching foreign languages. We now have positions open in Osaka starting September/October 2018 for instructions of English, German, Spanish and French.●Teach many different kinds of classes using the latest techn ology in small classes of up to 30 students.●A ccommodation, and other necessary documents will be rea dy before you leave.●Applicants will teach their first language only.●Excellent teacher training programs.If you are young with a university degree and are willing to e xperience different cultures, apply now. Experience in teachin g is an advantage but not specially required. Knowledge of th e Japanese language is not necessary but good English skills and practical computer knowledge are basic requirements. Apply with C.V. and send letter to:NOVA France, Mr. Sampy (IHT 3/2)34, Bd. Haussmann, 75009 Paris, FranceFax: 33148014804Or visit our website: www. The manager expects to meet and talk with successful applic ants in Paris in June and July.5. What is the purpose of the text?To introduce a language school in Japan.To describe working conditions in Japan.To make clear the requirements for Japanese teachers.To hire language teachers to work in Japan.6.We know from the text that those who are going to Japan will _____.A. get trained for the jobB. receive a degree from a universityC. have free accommodationD. teach English only i n Osaka7. Before going to Japan, you need _____.A. to see the manager of NOVA FranceB. to take some computer coursesC. to write a letter to JapanD. to find a place to live8. If you want to work in Japan, you should _____.A. have some working experienceB. know how to use computersC. present good teaching plansD. speak several languages.CWhat might the future be like? Here are some predictions: thin gs to come, things to go.Spring Festival, the most important Chinese holiday when ev eryone returns home has caused headaches for millions of C hinese. More than 2 billion people travel at the same time, ma king getting travel tickets and the journey difficult. But in 28 ye ars, Spring Festival travel may not be a problem at all. China plans to build more than 120,000 kilometers of railway and a f ast transportation network that will serve 90% of the populatio n by 2020.And because most of China will be cities, people will not have to go to other places to find a job, so it will no longer be a pro blem.Newspapers will come to an end in 2043. In the future, digit al newspapers will be sent to personal web tools through Inter net. Readers can discuss topics with journalists and editors. Information will move faster.Oil is running out faster than expected. But scientists have f ound something else for oil as fuel. Coal, natural gas, solar po wer, nuclear power and even water can take the place of oil a s sources of energy.Schools will go electronic. Computers will be important and popular among the students. Everything will be in the comput er and students will not need to bring books to school. They w ill find information on the Internet. A computer will be the stud ents' library, schoolbag and connection to the outside world. T here will be robot teachers, who will check homework on com puters and communicate with the students' parents through e-mail. And school buses will be like spaceships, comfortable a nd safe.9. Why has the Spring Festival caused headaches for many C hinese?A. Because it is the most important Chinese holiday.B. Because it costs too much money to celebrate it.C. Because the traffic is too heavy then.D. Because the travel tickets are too expensive then.10. What is not mentioned in the passage as sources of energ y ________.A. CoalB. WindC. Nuclear powerD. Water11. From the passage we can know ________ in the future.A. the Spring Festival travel may still be a problemB. 90% of the population will live in the cityC. robot teachers will check homeworkD.oil is running out faster than expected. Unluckily, scientists haven’t found something else for oil as fuel.12. What's the main idea of the last paragraph?A. Schools will go electronicB. Computers will be importa ntC. There will be robot teachersD. School buses will be like spaceshipsDThe old man walked with a cane (拐杖) slowly into the restaurant. His poor jacket, patched (打补丁的) trousers, and worn-out shoes made him stand out from the usual Saturday morni ng breakfast crowd. Unforgettable were his pale blue eyes tha t sparkled（闪光）like diamonds, large rosy cheeks, and thin lips that held a ste ady smile.He walked toward a table by the window. A young waitress w atched him and ran over to him, saying, “Here, Sir. Let me giv e you a hand with that chair.” Without a word, he smiled and n odded a thank you. She pulled the chair away from the table. Supporting him with one arm, she helped him move in front of the chair, and get comfortably seated. Then she pushed the t able up close to him, and leaned his cane against the table w here he could reach it. In a soft, clear voice he said, “Thank y ou, Miss.”“You’re welcome, Sir.” She replied. “My name is M ary. I’ll be back in a moment. If you need anything, just wave at me.”After he had finished a hearty meal of pancakes, bacon, and hot lemon tea, Mary brought him the change, helping him up f rom his chair and out from behind the table. She handed him his cane, and walked with him to the front door. Holding the d oor open for him, she said, “Come back and see us, Sir!” He n odded a thank you and said softly with a smile, “You are very kind!”When Mary went to clean his table, she was shocked. Under his plate she found a business card and a note written on the napkin, under which was a $ 100 bill. The note on the napkin r ead, “Dear Mary, I respect you very much, and you respect yo urself, too. It shows by the way you treat others. You have found the secret of happiness. Your kind gestures will shine thro ugh those who meet you.”The man she had served was the owner of the restaurant. Thi s was the first time that she, or any of his employees, had see n him in person.13．Mary ran over to the old man because _____.A. the old man was the boss of the restaurantB. she was worried that the old man might cause trouble to t he restaurantC. the old man had asked her to wait on himD. she saw the old man had some difficulty moving and taki ng a seat14．The words the man left on the napkin suggested that ___ __.A. respecting others means respecting oneselfB. serving others is a respectable jobC. Mary would get a rise as a result of her kindnessD. Mary’s kind service would bring in more money for her 15．Which of the following titles goes best with the story?A. A kind- hearted GirlB. Kindness Means OpportunitiesC. An opportunityD. A Special boss第二节（共5小题，每小题2分，满分10分）根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，并在答题卡上将该项涂黑。
燃电dcdc参数-概述说明以及解释
燃电dcdc参数-概述说明以及解释1.引言1.1 概述燃电DCDC（Direct Current to Direct Current）参数是指用于转换直流电压的相关参数。
在汽车和电动车辆领域，燃电DCDC参数起着至关重要的作用。
它们用于将高电压的电池输出转换为适合低电压设备使用的电源。
燃电DCDC参数包括输入电压范围、输出电压范围、效率、工作温度范围等。
首先，燃电DCDC参数的定义和作用是为了实现电能的高效转换。
电动车辆和混合动力汽车中通常使用高电压电池作为能源存储装置，而车内的低电压设备（如车载娱乐系统、车灯、空调等）需要低电压供电。
燃电DCDC参数的定义和优化使得高电压能够被转换为低电压，并且在转换过程中保持高效率。
其次，燃电DCDC参数的影响因素主要包括输入电压范围、输出电压范围和效率。
输入电压范围指的是DCDC模块能够接受的输入电压的范围，而输出电压范围则是DCDC模块能够输出的电压的范围。
这两个参数的选择需要考虑电动车辆系统的电压要求和电池的电压特性。
同时，效率是燃电DCDC参数中的一个关键指标，它表示了转换过程中能量的损耗程度，优化效率可以提高整个系统的能量利用率。
总之，燃电DCDC参数对于电动车辆和混合动力汽车的正常运行至关重要。
通过定义和优化燃电DCDC参数，可以实现电能的高效转换，并且提高整个能源系统的效率。
随着电动汽车技术的不断发展，燃电DCDC参数的研究和优化将会继续深入，为未来电动汽车的发展提供更好的能源转换解决方案。
1.2 文章结构文章结构部分的内容可以描述以下信息：文章结构部分旨在介绍本篇长文的整体组织和各个章节的内容安排，方便读者了解文章的脉络和逻辑结构。
本文按照以下章节进行组织和讨论：1. 引言：本章节主要对燃电dcdc参数的概述进行介绍，包括其定义、作用和重要性。
同时，还会介绍文章的整体结构和目的。
2. 正文：本章节将分为不同子章节，主要探讨燃电dcdc参数的定义、作用以及影响因素。
多相交错并联BUCK型DC-DC变换器分析与设计
than 1.3%. When the load current is greater than 2A, the current imbalance of each
method, including parameter calculation of input and output capacitors and energy
storage inductor.
Compared with the single-phase converter, the control strategy of the multi-phase
automatic current sharing method, external controller method, etc. need to add
additional circuits, which increases circuit complexity. In this thesis, the average current
换器扰动信号进行分析，提出了基于数字 PID 控制多相交错并联拓扑结构多环
控制策略。以三相交错并联 BUCK 型 DC-DC 变换器为例，通过 Matlab/Simulink
对该方案进行了仿真验证，仿真结果表明，采用该控制策略的三相交错并联
BUCK 型 DC-DC 变换器具有输出纹波低，带载能力强，各相电流均衡度、系统
of the drive signal. Affected by the manufacturing process, the actual parameters of the
RP08-AW系列宽范围输入DC DC转换器说明书
DescriptionThe RP08-AW series wide range input DC/DC converters are certified to UL60950-1 and cUL 60950-1. This makes them ideal for all telecom and industrial applications where approved safety standards are required. The 24V and 110VDC input versions have been especially designed for railway applications. The DIP24 package is available in both pinned and SMD case styles and meets military standards for thermal shock and vibration tolerance.RP08-AW DC/DC ConverterE196683UL60950-1 certifiedEN50155 certified8 WattDIP24/SMDSingle and Dual OutputFeaturesRegulated Converter• 4:1 Wide input voltage range • 1.6kVDC isolation• UL60950-1, EN50155 certified • Efficiency up to 88%• Protected outputs• High input voltage range (110VDC)Selection GuidePart Number Input Output Output Input (1) Efficiency (1) Max. Capacitive Voltage Range Voltage Current Current typ. Load (2) [VDC] [VDC] [mA] [mA] [%] [µF]RP08-243.3SAW (3)9-36 3.3 2400 388 85 1330RP08-2405SAW (3) 9-36 5 1600 383 87 1330RP08-2412SAW (3)9-36 12 666 387 86 288RP08-2415SAW (3) 9-36 15 533 387 86 200RP08-483.3SAW (3)18-75 3.3 2400 194 85 1330RP08-4805SAW (3) 18-75 5 1600 192 87 1330RP08-4812SAW (3)18-75 12 666 191 87 288RP08-4815SAW (3) 18-75 15 533 189 88 200RP08-1103.3SAW (3)43-160 3.3 2400 86 84 1330RP08-11005SAW (3) 43-160 5 1600 86 85 1330RP08-11012SAW (3)43-160 12 666 84 86 288RP08-11015SAW (3) 43-160 15 533 85 86 200RP08-2405DAW (3)9-36 ±5 ±800 397 84 ±900RP08-2412DAW (3) 9-36 ±12 ±333 387 86 ±133RP08-2415DAW (3)9-36 ±15 ±267 388 86 ±90RP08-4805DAW (3) 18-75 ±5 ±800 198 84 ±900RP08-4812DAW (3)18-75 ±12 ±333 191 87 ±133RP08-4815DAW (3) 18-75 ±15 ±267 192 87 ±90RP08-11005DAW (3)43-160 ±5 ±800 89 82 ±900RP08-11012DAW (3) 43-160 ±12 ±333 85 85 ±133RP08-11015DAW (3)43-160 ±15 ±267 86 85 ±90Input Voltage Output Voltage S ingle or D ualPackage (3)RP08-__ __ _AW/_Model NumberingOrdering ExamplesRP08-4805AW/SMD = 48V Input, 5V Output, SMD Package RP08-2405AW = 24V Input, 5V Output, DIP24 PackageNotes:Note3: No suffix for standard package (DIP24), add suffix “SMD” for SMD packageNotes:Note1: Maximum value at nominal input voltage and full loadNote2: Max Cap Load is tested at minimum Vin and constant resistive loadhttps:///pdf/Powerline_DC-DC/RSPxxx-168.pdfSpecifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)REGULATIONSParameter Condition Value Output Voltage Accuracy±1.0% Line Voltage Regulation low line to high line, full load±0.2%Load Voltage Regulationno load to full loadDIP24SingleDual±0.5%±1.0%SMD Single, Dual±1.0% 10% load to 90% loadDIP24SingleDual±0.3%±0.8%SMD Single, Dual±0.8%Cross Regulation asymmetrical 25%<>100% load±5.0% Transient Response recovery time25% load step change250μs typ.Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)PROTECTIONSParameterConditionValueShort Circuit Protection (SCP)continuous, automatic recoveryOver Voltage Protection (OVP)Single Output3.3Vout5Vout12Vout 15Vout3.9VDC typ.6.2VDC typ.15VDC typ.18VDC typ.Over Load Protection (OLP)% of Iout rated150% typ.Isolation Voltage DIP24I/P to O/P , I/P (O/P) to case 1.6kVDC/1 minute SMDI/P to O/PI/P (O/P) to case 1.6kVDC/1 minute 1.0kVDC/1 minuteIsolation Resistance 500VDC1G Ω min.Isolation Capacitance 1500pF max.Insulation GradefunctionalNotes:Note5: This power module is not internally fused. An input line fuse must always be used Recom suggests: 24Vin=T2A; 48Vin=T1A; 110Vin=T0.5A slow blowSpecifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)SAFETY AND CERTIFICATIONSCertificate Type (Safety)Report / File Number StandardInformation Technology Equipment, General Requirements for Safety E196683UL60950-1, 2nd Edition, 2014 C22.2 No. 60950-1-07, 2nd Edition, 2014Information Technology Equipment, General Requirements for Safety (LVD)TW1708010-001IEC60950-1:2005, 2nd Edition +A2:2013EN60950-1:2006 + A2:2013RoHS2+RoHS-2011/65/EU + AM-2015/863Railways Condition Standard / Criterion Railway Applications - Electrical Equipment used on rolling stock15A100701E-C EN50155:2007 Environmental testing Part 2-1: Tests – Test A: Cold temperature: -25°C, Dwell Time: 2 hours EN60068-2-1:2007 Environmental testing Part 2-2: Tests – Test B: Dry heat temperature: +70°C, Dwell Time: 6 hours EN60068-2-2:2007Environmental testing Part 2-30: Tests - Test Db: Damp heat, cyclic (12 h + 12 h cycle)temperature: +25 to +55°Chumidity: 90% to 100%RHtest Duration: 24 hours/cycle, 2 cyclesEN60068-2-30:2005Railway applications - Fire protection on railway vehicles Part2:Requirements for fire behaviour of materials and componentsEN45545-2:2013 Fire hazard testing Part 2-11: Glowing/hot-wire based testmethods –Glow-wire flammability test method for end-productsglow-wire test EN60695-2-11 Fire hazard testing Part 11-10: Test flames – 50 W horizontal andvertical flame test methodsvertical flame test EN60695-11-10 EMC Compliance Railway Condition Standard / Criterion Railway applications - Electromagnetic compatibility EN50121-3-2:2006 Industrial, scientific and medical equipment – Radio frequencydisturbance characteristics – Limits and methods of measurementEN55011 ESD Electrostatic discharge immunity test Air ±2, 4,8kV, Contact ±2, 4, 6kV EN61000-4-2, Criteria ARadiated, radio-frequency, electromagnetic field immunity test20V/m (80-1000MHz)10V/m (1400-2100MHz)5V/m (2100-2500MHz)EN61000-4-3, Criteria AFast Transient and Burst Immunity DC Power Port: ±2kV EN61000-4-4, Criteria ASurge ImmunityDC Power Port: Line-Line ±0.5, 1kVDC Power Port: Line-Earth ±0.5, 1.2kVEN61000-4-5, Criteria AImmunity to conducted disturbances, induced by radio-frequency fields DC Power Port 10V EN61000-4-6, Criteria AEMC Compliance Multimedia and IT Condition Standard / Criterion Electromagnetic compatibility of multimedia equipment –EmissionRequirementsEN55032:2015+AC:2016-07, Class B Information technology equipment - Immunity characteristics - Limitsand methods of measurementEN55024:2010 + A1:2015 ESD Electrostatic discharge immunity test Air ±2, 4, 8kV, Contact ±2, 4, 6kV IEC61000-4-2:2008, Criteria ARadiated, radio-frequency, electromagnetic field immunity test20V/m (80-1000MHz)IEC61000-4-3:2006+A1:2007 + A2:2010,Criteria AFast Transient and Burst Immunity DC Power Port: ±2kV IEC61000-4-4:2012, Criteria A Surge Immunity DC Power Port: ±2kV IEC61000-4-5:2014, Criteria A Immunity to conducted disturbances, induced by radio-frequency fields DC Power Port 10V IEC61000-4-6:2013, Criteria APower Magnetic Field Immunity50Hz 100A 1 minute50Hz 1000A 1 secondIEC61000-4-8:2009, Criteria ANotes:Note9: The standard modules meet EMI Class A or Class B with external components, see filter suggestions below on next page Note10: An external input filter capacitor is required if the module has to meet EN61000-4-4, EN61000-4-5 Recom suggests Nippon chemi-con KY series 24Vin, 48Vin=220μF/100V or 110Vin=150μF/200VDIMENSIONS and PHYSICAL CHARACTERISTICSParameter Type ValueMaterialcasebasepottingnickel coated coppernon-conductive black plastic (UL94-V2)epoxy (UL94-V0)Package Dimensions (LxWxH)DIPSMD31.8 x 20.3 x 10.2mm32.0 x 20.3 x 11.2mmPackage WeightDIPSMD18g20g continued on next pageSpecifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)Specifications (measured @ Ta= 25°C, nom. Vin, full load and after warm-up unless otherwise stated)The product information and specifications may be subject to changes even without prior written notice.The product has been designed for various applications; its suitability lies in the responsibility of each customer. The products are not authorized for use in safety-critical applications without RECOM’s explicit written consent. A safety-critical application is an application where a failure may reasonably be expected to endanger or cause loss of life, inflict bodily harm or damage property. The applicant shall indemnify and hold harmless RECOM, its affiliated companies and its representatives against any damage claims in connection with the unauthorizeduse of RECOM products in such safety-critical applications.PACKAGING INFORMATIONParameterTypeValuePackaging Dimension (LxWxH)TubeDIP24SMD255.0 x 23.0 x 19.0mm 255.0 x 32.0 x 16.0mmPackaging Quantity DIP24, SMD7pcsStorage Temperature Range -55°C to +125°C Storage Humidity5% - 95% RH。
特克达TCL-DC系列工业级DC DC转换器说明书
Industrial DC/DC-ConverterTCL-DC Series, 24 to 60 WattFeatures◆ Ultra-wide input voltage range ◆ Output voltage adjustable◆ Overload and short circuit protection ◆ Low ripple and noise ◆ I/O isolation 1500 VDC ◆ Compact, slim plastic case◆ Reliable snap-on mount on DIN-rail ◆ Bracket for wall mount included ◆ 3-year product warrantyIn the TCL range of DIN-rail power supplies are 6 models for DC input voltage avail-able. The wide input ranges of 9.5–18 VDC resp. 18–75 VDC means these models can be operated from all popular DC supply voltage systems.With tightly regulated output voltage these DC/DC converters provide a reliable power source for sensitive loads in industrial process controls, factory automation and other equipment exposed to a critical industrial environment. Further applica-tions for these converters are isolation of a specific load or refreshing the 24 V bus voltage. Easy installation is provided with snap-on mounting on DIN-rails and detachable screw terminal block.UL 508C BSchemeInput power at no load 1.0 Watt max.Start-up voltage/under voltage shut down TCL 012 model:8.4 VDC / 7.6 VDCTCL 024 & TCL 060 models:17.2 VDC / 15.7 VDCReverse polarity protection by internal fuseEfficiency 86 % typ.Output voltage adj. range 5 VDC model: 5.0 – 5.25 VDC12 VDC models: 12.0 – 15.0 VDC24 VDC models: 24.0 – 28.0 VDCRegulation – Input variation Vin min. to Vin max.0.5 % max– Load variation 0...100%0.5 % maxRipple and noise (20 MHz bandwidth)<50 mV pk-pkElectronic short circuit protection current limitation at 110 % typ.(constant current, automatic recovery) Overvoltage protection, trigger point 5 VDC model: <6.5 V12 VDC models:<24 V24 VDC models: <42 VTemperature ranges – Operating–25°C to +70°C max.– Storage (non operating)–25°C to +85°CTemperature derating TCL 012 & TCL 024 models: 1.5 %/K above +50°CTCL 060 models: 2.0 %/K above +40°CHumidity (non condensing)95 % rel. H max.Temperature coefficient 0.02 %/KSwitching frequency 55 – 180 kHz depending on load(frequency modulation)Isolation voltage (60 sec.)– Input/Output 1500 VDCReliability, calculated MTBF at +25°C (according to IEC 61709)>2.5 Mio hSafety standards – Information technology equipment IEC 60950-1, EN 60950-1 (output SELV),UL Std. 60950-1 (2nd Edition) +Am1:2011,CAN/CSA-C22.2 No. 60950-1-07 +Am1:2011 – Industrial control equipment UL 508– Electronic equipment for power installation EN 50178– Electrical equipment for machines EN 60204Safety approvals – UL approval -> certificationsUL 508C listed, CSA C22.2 No.14 File e210002 Electromagnetic compatibility (EMC), emissions EN 61000-6-3– Conducted RI suppression on input EN 55022 class B– Radiated RI suppression EN 55022 class BElectromagnetic compatibility (EMC), immunity EN 61000-6-2– Electrostatic discharge (ESD)EN 61000-4-2 4 kV / 8 kV– Radiated RF field immunity EN 61000-4-3 10 V/m– Electrical fast transient / burst immunity EN 61000-4-4 Level 3– Surge immunity EN 61000-4-5 Level 3– Immunity to conducted RF disturbances EN 61000-4-6 10 VrmsEnvironmental compliance – Reach /info/reach-declaration.pdf – RoHS RoHS directive 2011/65/EUCase protection IP 20 (IEC 60529)Enclosure material plastic UL 94V-0 ratedMounting DIN-rails as per EN 50022-35x15/7.5(snap-on with self-locking spring)bracket for wall/chassis mount included Installation instructions /overview/tcl-dcAll specifications valid at nominal input voltage, full load and +25 °C after warm-up time unless otherwise stated.Rev. April 9, 2019Page 3 of 3adjustDimensions in [mm], () = InchTolerances: ±0.5 (±0.02)Case DimensionsWall Mounting BracketInstead on a DIN-rail, the modules can be also mounted on a chassis or wall with help of a mounting bracket which is supplied as standardwith each ConverterDC-ON LEDadjustTCL 012 and TCL 024 modelsTCL 060 model。
XL6007 400KHz 60V 2A开关电流升压 升降压型DC-DC转换器说明书
400KHz 60V 2A 开关电流升压/升降压型DC-DC转换器XL6007特点⏹ 3.6V到24V宽输入电压范围⏹集成单反馈引脚的正或负输出电压编程⏹电流模式控制提供出色的瞬态响应⏹ 1.25V基准电压输出可调⏹固定400KHz开关频率⏹最大2A开关电流⏹SW脚内置过压保护功能⏹出色的线性与负载调整率⏹EN脚TTL关机功能⏹内置功率MOS⏹效率高达90%⏹内置频率补偿功能⏹内置软启动功能⏹内置热关断功能⏹内置限流功能⏹SOP8封装应用⏹汽车和工业转换器⏹便携式电子设备描述XL6007稳压器是一种宽输入范围、电流模式DC/DC转换器，能够产生正输出电压或负输出电压。
它可以配置为升压、反激、SEPIC 或反相转换器。
XL6007内置N沟道功率MOSFET和固定频率振荡器，电流模式架构可在宽输入电压范围和输出电压范围内稳定运行。
XL6007稳压器是专为便携式电子设备设计的。
图1.XL6007封装400KHz 60V 2A 开关电流升压/升降压型DC-DC 转换器 XL6007引脚配置XL600713524SWEN FB VIN NC678SW GNDGND图2. XL6007引脚配置表1.引脚说明引脚号 引脚名称 描述1 EN 使能引脚，低电平关机，高电平工作，悬空时为高电平。
2 VIN 电源输入引脚，支持DC3.6V~24V 宽范围电压操作，需要在VIN 与GND 之间并联电解电容以消除噪声。
3 FB 反馈引脚，参考电压为1.25V 。
4 NC 无连接。
5,6 SW 功率开关输出引脚，SW 是输出功率的开关节点。
7,8 GND接地引脚。
400KHz 60V 2A 开关电流升压/升降压型DC-DC 转换器 XL6007方框图EA2.5V Regulator 1.25V ReferenceSWGND2.5V 1.25VEA COMPOscillator400KHzDriverFBOVPNDMOSENOCPRS LatchThermal ShutdownSlop CompensationPhase CompensationUVLOSoft StartVIN图3. XL6007方框图典型应用XL6007C IN 47uf /50VD1 1N5822L 33uh/4AVIN27,8135,6GNDVINSWC1105EN ON OFF Boost Converter Input 12V ~ 16VOutput 18.5V / 0.5A VOUT=1.25*(1+R2/R1)R1 1KC OUTR2 13.8KVOUT 18.5VC2105FB图4. XL6007系统参数测量电路（Boost 转换器）400KHz 60V 2A开关电流升压/升降压型DC-DC转换器XL6007订购信息产品型号打印名称封装方式包装类型XL6007E1 XL6007E1 SOP8 2500/4000只每卷XLSEMI无铅产品，产品型号带有“E1”后缀的符合RoHS标准。
迅迪电子 XD308H 宽输入电压范围降压型 DC DC 转换器规格书说明书
XD308H 宽输入电压范围降压型DC/DC 转换器规格书1.2产品特性：•典型待机功耗小于40mW；•输出最大持续电流500mA （峰值800mA),无音频噪音、发热低；•18-600VDC 超宽输入电压,可适应12-380VAC超宽电压输入；•全面的保护功能：•过流保护（OCP）•过温保护（OTP）•过压保护（OVP）•SOP8贴片封装；1.3典型应用（非隔离）：•替代低效率的阻容降压供电电路(如低压电器，智能电表，自动化仪表电源等)；•LED驱动•小家电电源•工业控制电源•其他非隔离辅助电源1.4输入电压/输出电流表：序号输入电压范围（DC 单位：V）输出电压（DC 单位：V）持续工作输出电流（Max 单位：mA)瞬时峰值电流（单位：mA)参考电路图号118-600 3.3500800图B1218-600 5.0500800图B2345-60012500800图B3445-60024500800图B4XD308H 是一款18-600V 超宽范围输入的高压降型DC-DC 转换器电源芯片，可适应12-380VAC 超宽电压输入(外部加整流滤波)，最大输出持续电流可以达到500mA（峰值800mA)，无音频噪音、发热低，内部集成全面完善的保护功能（短路保护，过载保护，输出过压保护、输出欠压保护，过热保护等）。
该电源芯片以较低的BOM 成本（外围元件数目极少）方便的实现宽电压高压降压小功率电源解决方案,广泛应用于非隔离型家电产品和工业产品等。
1.5封装参考：1.6引脚功能：编号名称描述备注1VCC/BP所有控制电路的电源。
外部旁路电容连接点2GND/S芯片参考地。
内部功率MOSFET的源极。
3FB反馈输入4CS电流检测5,6,7,8DRAIN内部功率MOSFET的漏极1.7功能框图：图11.8典型应用电路：1.9绝对最大额定值(备注1)：1.10推荐的工作条件(备注2)：参数数值单位工作环境温度-40to85°C1.11电气特性：=+25℃。
DC1724A LTM8029 36VIN, 600mA 步进微模块转换器说明书
Description 36V IN, 600mA Step-Down µModule Converter with 5µA Quiescent CurrentDC1724A is a µModule® step-down converter, featuring the L TM8029, which consumes only 5µA of quiescent current. The demo circuit is designed for a 5V, 600mA output at an operating frequency of 600kHz. The input voltage range is from 5.6V to 36V. Equipped with an off-time skipping capability, the L TM8029 can operate at input voltages lower than other step-down regulators.The wide input range of the L TM8029 allows a variety of input sources such as automotive batteries and industrial supplies. Its current mode control scheme creates fast transient response and good loop stability. At light loads, the L TM8029 operates in Burst Mode® operation to maintain high efficiency and low output ripple over a broad currentBoarD photo range. To provide a programmable undervoltage lockout, users can remove jumper JP1 and populate R1 and R3 on the RUN pin.The L TM8029 data sheet gives a complete description of the part, operation and application information. The data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC1724A. Design files for this circuit board are available at /demoL, L T, L TC, L TM, µModule, Linear Technology, the Linear logo and Burst Mode are registered trademarks of Linear Technology Corporation. All other trademarks are the property of theirrespective owners.1dc1724afa2dc1724afaDC1724A provides an easy way to evaluate the performance of the L TM8029. Refer to Figure 2 for proper measurement equipment setup and follow the procedure below: NOTE: When measuring the input or output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the input or output voltage ripple by touching the probe tip directly across the V IN or V OUT and GND terminals. See Figure 3 for proper scope probe technique.1. Place JP1 on the ON position.2. With power off, connect the input power supply to V IN and GND.3. Turn on the power at the input.NOTE: Make sure that the input voltage does not exceed 36V . 4. Check for the proper output voltage.NOTE. If there is no output, temporarily disconnect the load to make sure that the load is not set too high or is shorted.5. Once the proper output voltage is established, adjust the load within the operating range and observe the output voltage regulation, ripple voltage, efficiency and other parameters.Quick start proceDureperformance summary(T A = 25°C)PARAMETER CONDITIONS VALUE Input Voltage Range V OUT = 5V5.6V to 36V Output Voltage5V Maximum Output Current 600mA Typical Switching Frequency 600kHz Typical EfficiencyV IN = 12V , V OUT = 5V , I OUT = 600mA85%Figure 1. DC1724A Output Noise Spectrum (V IN = 12V , V OUT = 5V , I OUT = 600mA)FREQUENCY (MHz)I N T E N S I T Y (d B m )0–20–60–100–40–80–120–140213DC1724A F0151.50.52.543.54.53dc1724afaQuick start proceDureFigure 2. Proper Measurement Equipment SetupFigure 3. Measuring Input or Output Rippleparts ListITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBERRequired Circuit Components11C2CAP., X7R, 1.0µF, 50V, 10%, 0805MURATA, GRM21BR71H105KA12L21C3CAP., X5R, 22µF, 6.3V, 20%, 1206TDK, C3216X5R0J226M31R2RES., CHIP, 0Ω, 1/16W, 0603NIC, NRC06ZOTRF41R4RES., CHIP, 316k, 1/10W, 1%, 0603VISHAY, CRCW0603316KFKEA51R5RES., CHIP, 100k, 1/10W, 1% 0603VISHAY, CRCW0603100KFKEA61R6RES., CHIP, 221k, 1/10W, 1% 0603VISHAY, CRCW0603221KFKEA71R7RES., CHIP, 0Ω, 1/4W, 1% 1206NIC, NRC12Z0TRF81U1IC., MODULE REGULATOR, L TM8029EY BGA-35 LEAD LINEAR TECH., L TM8029EVAdditional Demo Board Circuit Components11C1CAP., ALUM, 10µF, 50V SUN ELECT., 50CE10BS20C4, C5 (OPT)CAP., 060330C6 (OPT)CAP., 121040C7 (OPT)CAP., ALUM CAP.50R1, R3 (OPT)RES., CHIP, 060360FB1 (OPT)FERRITE BEAD, M TYPE TAIYO YUDEN, FBMJ3216HS800T70L1 (OPT)IND., 10µH VISHAY, IHLP-2525CZ-01Hardware – For Demo Board Only16E1–E6TEST POINT, TURRET, 0.094" PBF MILL-MAX, 2501-2-00-80-00-00-07-021JP1 3 PIN 0.079" SINGLE ROW HEADER SAMTEC, TMM103-02-L-S31XJP1SHUNT, 0.079" CENTER SAMTEC, 2SN-BK-G41STENCIL4dc1724afa5dc1724afaInformation furnished by Linear Technology Corporation is believed to be accurate and reliable. However , no responsibility is assumed for its use. Linear Technology Corporation makes no representa-tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.schematic Diagram6dc1724afaLinear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7417(408) 432-1900 ● FAX : (408) 434-0507 ● www.linear .comLINEAR TECHNOLOGY CORPORA TION 2012LT 0612 REV A • PRINTED IN USADEMONSTRATION BOARD IMPORTANT NOTICELinear Technology Corporation (L TC) provides the enclosed product(s) under the following AS IS conditions:This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONL Y and is not provided by L TC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT , SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.The user assumes all responsibility and liability for proper and safe handling of the goods. Further , the user releases L TC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.).No License is granted under any patent right or other intellectual property whatsoever. L TC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.L TC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive .Please read the DEMO BOARD manual prior to handling the product . Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged .This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a L TC applica-tion engineer .Mailing Address:Linear Technology 1630 McCarthy pitas, CA 95035Copyright © 2004, Linear Technology Corporation。
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高度通用DC DC 转换器LT3957（Linear）
来源：21ic 作者：
凌力尔特公司(Linear Technology Corporation) 推出面向升压、反激式、SEPIC 和负输出电源应用的高度通用DC/DC 转换器
LT3957。
该器件在3V 至40V 的输入电压范围内工作、具内置5A/40V 电源开关并实现高达96% 的效率，从而非常适用于工业、汽车、医疗和电信应用。
LT3957 用两个内部电压反馈误差放大器和基准电压，可以产生正或负的稳定输出电压。
一套用于正输出电压，另一套用于负输出电压，两者都来自单个反馈引脚。
利用从100kHz 到1MHz 的可编程固定或可同步工作频率，设计师可以在很宽的范围内选择电感器和电容器，以优化尺寸、性能和成本。
其电流模式控制可在宽电源和输出电压范围内实现稳定工作。
该器件支持仅使用陶瓷电容器的设计，从而实现了更小的解决方案尺寸。
其它特点包括：可编程软启动、可调输入欠压闭锁以及输出过压和过流保护。
LT3957 在-40°C 至125°C 的温度范围内工作，采用具附加引脚间隔以支持高压工作的5mm
x 6mm QFN-36 封装。
千片批购价为每片2.95 美元。
性能概要：LT3957
•面向升压、反激式、SEPIC 和负输出应用•宽输入工作电压：3V 至50V
•内置5A/40V 电源开关
•用单个反馈引脚进行正或负的输出电压设置•可选固定100kHz 至1MHz 工作频率
•可同步至外部时钟
•可编程软启动
•真正电流模式控制
•附加引脚至引脚IC 间隔
•输出过压和过流保护
•具迟滞的可编程输入欠压闭锁。