AD85063 Step-Down DC-DC变换器—车载降压_1A车充IC SOP-8

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1A降压型DC-DC转换器EL7536中文资料

E L7536单片1A步降调整器概述EL7536是带有内部补偿的同步集成FET 1A步降调整器。

它工作的输入电压范围为2.5V~5.5V，适用于3.3V，5V的电源，或锂离子电源。

输出可通过电阻分压器从外部设置，范围为0.8V~V IN。

EL7536的主要特点是PWM模式控制。

它的工作频率的典型值是1.4MHz。

其他特点还包括100ms的上电复位输出，小于1µA 的关机电流和过热保护。

EL7536是10引脚MSOP封装，所有零件只占用印刷电路板的一面，且整个转换器的面积小于0.15in2。

EL7536规定的工作温度范围为-40℃到+85℃。

订购信息表特点整个1A 转换器的覆盖面积小于0.15in2（0.97cm2）所有零件在PCB的一面最大高度为1.1mm MSOP10100ms的加电复位输出（POR）内部补偿电压模式控制器高达97%的效率<1µA的关机电流过流和过热保护无铅（依照RoHS）应用PDA和袖珍式PC电脑条形码识别器蜂窝式电话便携式测试设备锂离子电池供电设备小结构（SFP）模块管脚引出线和典型应用图极限参数（T A=25℃）对SGND的V IN，V DD和POR………………………………-0.3V至+6.5V对PGND的LX………………………………………… -0.3V至（V IN++0.3V）对SGND的RSI,EN,V O和FB………………………… -0.3V至（V IN++0.3V）对SGND的PGND…………………………………………… -0.3V至+0.3V输出峰值电流………………………………………………… 1.2A工作环境温度…………………………………………………-40℃至+85℃贮存温度……………………………………………………… –65℃至+150℃节点温度 (145)电气指标所有规格在V DD=V IN=V EN=3.3V，C1=C2=10μF，L=1.8μH，V O=1.8V的条件下，除非另有说明。

AD85063 Step-Down DC-DC变换器—车载降压_1A车充IC SOP-8

AD85063 Step-Down DC-DC变换器
新型车载降压_1A车充IC
产品详情
型号AD85063 品牌AD
功率800MA 用途车充IC
封装SOP-8
品牌:国产AD [Analog Devices]
封装:SOP-8
MC34073、34063的替代产品
AD85063是专用于DC-DC降压变换器，芯片内部集成了有温度补偿带隙基准源电路，一个占空比周期控制振荡器，驱动器和大电流输出开关，比MC34063产品比较，能使用最少的外接元件构成，开关式降压变换器！
AD85063 外接电路元件少，适用于车充充电器等低成本充电器方案；比34063省4个电阻一个陶瓷电容
�工作电压范围大：3.0V~30V；
�有短路电流保护功能；
�低静态电流；
�输出电压范围如下：
AD85063： 5.1V±3%@Vin=12.0V；
AD85063A：5.6V±3%@Vin=12.0V；
AD85063B：6.0V±3%@Vin=12.0V；
AD85063C：7.0V±3%@Vin=12.0V；
�输出电流最大可达1000MA@ Vin=12.0V；
�封装形式：SOP-8
苹果USB充电标准识别电阻，兼容D+、D-短接：。

MC34063升压,降压,负压

MC34063 DC/DC变换器控制电路介绍
一、MC34063 电路简介
MC34063是一单片双极型线性集成电路，专用于直流-直流变换器控制部分。片内包含有温度补偿带隙基准源、一个占空比周期控制振荡器、驱动器和大电流输出开关，能输出1.5A的开关电流。它能使用最少的外接元件构成开关式升压变换器、降压式变换器和电源反向器。特点：能在3.0-40V的输入电压下工作短路电流限制低静态电流输出开关电流可达1.5A（无外接三极管）输出电压可调工作振荡频率范围为100HZ到100KHZ 可构成升压、降压或反向电源变换器
MC34063引脚图及原理框图
10
导截通止 10
10
1
10
低于1.25V 高于1.25V
设计规范表
1、MC34063降压变换器电路
1.25
R1
R1 R2
uo
uo
1
R2 R1
1.25
参数设计
ton
Vout VF
Vout
5 1
toff Vin(min) Vsat Vout Vin(min) Vout 25 5 4
Vin(min) Vsat Vout IC (swatch)
ton
Vin(min) Vout IC (swatch)
ton
222106 H 222H
取R1=1.2k，由
uo
1
R2 R1
1.25
R2
3.6k
2、MC34063大电流降压变换器电路
3、 MC34063升压变换器电路
4、MC34063反向变换器电路
f
1
ton toff
20KHz ton 10 A IC (switch) 2Iout (max) 0.9 A

MC34063 DCDC降压电源

基于MC34063的降压电源设计DC—DC降压电源DC--DC降压电源摘要：该降压电源变换电路采用MC34063芯片作为其电路构成的核心部分，用以对15v的输入滴电压经过降压电路降至5v；定时电容Ct用以控制振荡器的频率，电感L和电阻R1,R2则是以控制输出端电压；调节电感L的电感量以及电阻R2与R1的比值即可控制输出端的电压输出，该电路设计则是输出端的电压降至5v；且要求在输出端带负载时的电压压降在0---0.5v之间，同时要求输出端波纹尽量小。

English subject：Buck type transform power supplyAbstract:The buck power converter circuit adopts MC34063 chip as its core part of a circuit to the input voltage of the 12 V power supply circuit after step-down down to 5 V; Timing capacitance Ct can control the oscillator frequency, inducta nce L and resistance R1, R2 is used to control the output voltage of the; Adjust th e inductance load and inductance L resistance and can control the ratio R2 R1 is the output voltage output, this circuit design is the output voltage drop to 5 V; A nd require in the output voltage of the load to bring pressure drop in 0-between 0 .5 V, also asked the output ripple as low as possible.Keywords:Buck type transform power supply MC34063 12 V down to 5 V目录一．理论分析 (4)1.MC34063简介 (4)1.1.1MC34063构成 (4)1.1.2MC3406内部原理 (4)1.1.3MC34063主要应用电路 (4)2.制作的设计思路： (5)1.2.1题目要求 (5)1.2.2用MC34063制作降压电路的设计思路 (5)二：方案设计与论证 (6)2.1.1设计思路与原理图设计 (6)2.1.2降压电路相关参数计算 (6)三：系统硬件电路与实现 (7)四．系统测试 (7)4.1.1调试中用到的仪器 (7)4.1.2调试中遇到的问题 (7)4.1.3解决方案 (7)4.2测试 (7)4.2.1测试结果(数据) (8)4.2.2测试结论与误差分析 (8)附录1：电路原理图 (8)一．理论分析1.MC34063简介：1.1.1构成：MC34063是一种开关型高效DC/DC变换集成电路。

基于MC34063芯片DC-DC(20-5)降压型变换电路

目录基于MC34063芯片的DC-DC(20/5)降压型变换电路 (2)1 引言 (3)2 设计要求及分析 (4)2.1、设计要求 (4)2.2、设计分析 (4)3 MC34063芯片介绍 (5)3.1、MC34063的引脚图及引脚介绍 (5)3.2、MC34063内部组成及示意图 (5)3.3、MC4063芯片特点 (6)4 系统整体方案的论证与选择 (6)4.1、外接开关管方案 (6)4.2、不外接开关管方案 (8)5 基于MC34063变换电路的工作原理 (9)5.1、DC-DC开关电源的电路组成及工作原理 (9)5.2、基于MC34063降压变换电路原理 (11)6 电路仿真 (20)6.1、proteus仿真软件介绍 (20)6.2、仿真电路及测试图 (20)7 实物测试及结论分析................................................................................. 错误！未定义书签。

7.1、实物及测试结果............................................................................ 错误！未定义书签。

7.2、结果分析........................................................................................ 错误！未定义书签。

参考文献.. (22)附录 .............................................................................................................. 错误！未定义书签。

致谢 ............................................................................................................ 错误！未定义书签。

TS34063 DC-DC 转换器控制器数据手册说明书

SOP-8DIP-8General DescriptionTS34063 is a monolithic switching regulator and subsystem intended for use as DC to DC converter. It containsan internal temperature compensated reference, comparator, controlled duty cycle oscillator with an active peak current limit circuit, drive and a high current output switch. The TS34063 is specifically designed to be incorporated in step-up, step-down and voltage inverting converter applications. TS34063 is offered in SOP-8 and DIP-8 packageFeatures● Power forward control circuit ● Operating voltage from 3V to 40V ● Low standby current ● Current limit adjustable● Output switch current up to 1.5A● Variable oscillator frequency up to 100kHz(max.) ● Output voltage adjustablePin DescriptionNameDescriptionSC Switch Collector SE Switch Emitter CT Timing Capacitor GND GroundCOMP. Comparator Inverting Input V CC V CC Collector I PK IPK Sense V DRIVERDriverApplications● Charger● xD-ROM, xDSL products ● DC to DC converterOrdering InformationPart No.PackagePackingTS34063CD C3 DIP-8 50pcs / Tube TS34063CS RLSOP-82.5Kpcs / 13” ReelAbsolute Maximum RatingParameterSymbolMaximumUnitSupply VoltageV CC 40 V Comparator Input Voltage Range V FB - 0.3 ~ 40V Switch Collector Output Voltage V C(SW) 40 V Switch Emitter VoltageV E(SW) 40 V Switch Collector to Emitter Voltage V CE(SW) 40 V Driver Collector Voltage V C(DRIVER) 40 V Driver Collector Current (note 1) I C(DRIVER) 100 mA Output Switching Current I SW 1.5 A Power DissipationDIP-8 P D 1.0 WSOP-80.5 Operating Ambient Temperature Range T OPR -40 ~ +85 oC Junction Temperature RangeT J0 ~ +125 o C Storage Temperature Range T STG -65 ~ +150oCNote: Maximum package power dissipation limits must be observedPin Definition:1. SC 5. Comp2. SE 6. Vcc3. CT 7. Ipk4. Gnd 8. VdriverElectrical Characteristics(V CC =5V, Ta =25o C; unless otherwise noted.)Parameter Symbol Test Conditions Min Typ Max Unit Oscillator (OSC)Frequency F OSC C T = 1nF, Vpin5= 0V 24 33 42 KHz Charge Current I CHARGE V CC = 5V ~ 40V 24 30 42 uA Discharge Current I DISCHARGE V CC = 5V ~ 40V 140 200 260 uADischarge to Charge current ratio I DISCHARGE/ I CHARGEPin7 to V CC 5.2 6.5 7.5 --Current Limit Sense Voltage V IPK(SENSE)I DISCHARGE = I CHARGE250 -- 350 mV Output switch (note1)Saturation Voltage V CE(SAT)I SW= 1A, pin1, 8 connected -- 1.0 1.3 V Saturation Voltage V CE(SAT)I SW= 1A, Id=50mA -- 0.45 0.7 V DC current gain H FE I SW = 1A, V CE= 0.5V 50 75 -- -- Collector off-state current I C(OFF)V CE = 40V -- 0.01 100 uA ComparatorThreshold Voltage V REF 1.225 1.25 1.275 V Line regulation REG LINE V CC = 3V ~ 40V -- -- 6 mV Total deviceSupply Current I CC V CC = 5V ~ 40V, C T = 1nF,pin7= V CC, pin5> V TH,pin2=Gnd, remaining pinsopen-- 3 5 mANotes1: Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possibleNote 2:If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents (<=300mA) and high driver currents (>=30mA), it may take up to 2uS for it to come out of saturation. This condition will shorten the off time at frequencies >= 30KHz, and is magnified at high temperature. This condition does not occur with a Darlington configuration, since the output switch cannot saturate. If a non-darlington configuration is used, the following output drive condition is recommended: Forced Bata of output switch: Ic output / (Ic driver – 7mA*) >= 10* The 100ohm resistor in the emitter of the driver divide requires about 7mA before the output switch conducts.Block DiagramElectrical Characteristics CurveFig 1. Output Switch ON-OFF TIME vs.Oscillator Timing CapacitorFig 2. Timing Capacitor Wave FormFig 3. Oscillator Frequency vs. Timing CapacitorFig 4. Standby Supply Current vs. Supply VoltageFig 5. Current Limit Sense Voltage vs. TemperatureTypical Application CircuitTest Conditions ResultsLine Regulation V IN= 8V~16V, Io= 175mA 30mV = ± 0.05%Load Regulation V IN = 12V, Io= 75mA to 175mA 10mV = ± 0.017%Output Ripple V IN =12V, Io= 175mA 400mVppEfficiency V IN =12V, Io= 175mA 87.7%Output Ripple with Optional Filter V IN =12V, Io= 175mA 40mVppFigure 7. Step Up ConverterTypical Application Circuit (Continue)Test Conditions ResultsLine Regulation V IN= 15V~25V, Io= 500mA 12mV = ±12%Load Regulation V IN = 25V, Io= 50mA to 500mA 3mV = ±0.03%Output Ripple V IN =25V, Io= 500mA 120mVppShort Circuit Current V IN =25V, R L= 0.1mΩ 1.1AEfficiency V IN =25V, Io= 500mA 83.7%Output Ripple with Optional Filter V IN =25V, Io= 500mA 40mVppFigure 9. Step Down ConverterTypical Application Circuit (Continue)Test Conditions ResultsLine Regulation V IN= 4.5V~6V, Io= 100mA 3mV = ±120.012%Load Regulation V IN = 5V, Io= 10mA to 100mA 0.022V = ±0.09%Output Ripple V IN =5V, Io= 100mA 500mVppShort Circuit Current V IN =5V, R L= 0.1Ω910mAEfficiency V IN =5V, Io= 100mA 62.2%Output Ripple with Optional Filter V IN =5V, Io= 100mA 70mVppFigure 11. Voltage Inverting ConverterDesign Formula TableTerms and DefinitionsVsat = Saturation Voltage of the output switch.Vf= Forward Voltage drop of the rectifier.The following power supply characteristics must be chosen:Vin= Normal input voltageVout: Desied Output voltage, |Vout| =1.25 (1+R2 / R1)Iout : Desired output current.fmin : Minimum desired output switching frequency at the selected values for Vin and Io.Vripple(p-p): Desired peak-to-peak output ripple voltage. in practice, the calculated capacitor value will need to be increased due to its equivalent series resistance and board layout. The ripple voltage should be kept toa low value since it will directly affect the line and load regulation.SOP-8 Mechanical DrawingMarking DiagramY = Year Code M = Month Code(A =Jan, B =Feb, C =Mar, D =Apl, E =May, F =Jun, G =Jul, H =Aug, I =Sep, J =Oct, K =Nov, L =Dec) L = Lot CodeSOP-8 DIMENSION DIM MILLIMETERS INCHES MIN MAX MIN MAX. A 4.80 5.00 0.189 0.196 B 3.80 4.00 0.150 0.157 C 1.35 1.75 0.054 0.068 D 0.35 0.49 0.014 0.019 F 0.40 1.25 0.016 0.049G 1.27BSC 0.05BSC K 0.10 0.25 0.004 0.009 M 0º 7º 0º 7º P 5.80 6.20 0.229 0.244 R0.25 0.50 0.010 0.019DIP-8 Mechanical DrawingMarking DiagramY = Year Code M = Month Code(A =Jan, B =Feb, C =Mar, D =Apl, E =May, F =Jun, G =Jul, H =Aug, I =Sep, J =Oct, K =Nov, L =Dec) L = Lot CodeDIP-8 DIMENSION DIM MILLIMETERS INCHES MIN MAX MIN MAX A 9.07 9.32 0.357 0.367 B 6.22 6.48 0.245 0.255 C 3.18 4.45 0.125 0.135 D 0.35 0.55 0.019 0.020 G 2.54 (typ) 0.10 (typ) J 0.29 0.31 0.011 0.012 K 3.25 3.35 0.128 0.132 L 7.75 8.00 0.305 0.315M- 10o - 10oNoticeSpecifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.Information contained herein is intended to provide a product description only. No license, express or implied, to any intellectual property rights is granted by this document. Except as provided in TSC’s terms and conditions of sale for such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of TSC products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify TSC for any damages resulting from such improper use or sale.。

低成本DCDC转换器34063的应用(图)

低成本DC/DC转换器34063的应用(图)斩波型开关电源斩波型开关电源按其拓扑结构通常可以分为3种：降压型(Buck)、升压型(Boost)、升降压型(Buck-boost)。

降压型开关电源电路通常如图1所示。

图1中，T为开关管，L1为储能电感，C1为滤波电容，D1为续流二极管。

当开关管导通时，电感被充磁，电感中的电流线性增加，电能转换为磁能存储在电感中。

设电感的初始电流为iL0，则流过电感的电流与时间t的关系为： iLt= iL1+(Vi-Vo-Vs)t/L，Vs为T的导通电压。

当T关断时，L1通过D1续流，从而电感的电流线性减小，设电感的初始电流为iL1，则则流过电感的电流与时间t的关系：iLt=iL1-(Vo+Vf)t/L，Vf为D1的正向饱和电压。

图1降压型开关电源基本电路34063的特殊应用● 扩展输出电流的应用DC/DC转换器34063开关管允许的峰值电流为1.5A，超过这个值可能会造成34063永久损坏。

由于通过开关管的电流为梯形波，所以输出的平均电流和峰值电流间存在一个差值。

如果使用较大的电感，这个差值就会比较小，这样输出的平均电流就可以做得比较大。

例如，输入电压为9V，输出电压为 3.3V，采用220μH的电感，输出平均电流达到900mA，峰值电流为1200mA。

单纯依赖34063内部的开关管实现比900mA更高的输出电流不是不可以做到，但可靠性会受影响。

要想达到更大的输出电流，必须借助外加开关管。

图2和图3是外接开关管降压电路和升压电路。

图2升压型达林顿及非达林顿接法图3 降压型达林顿及非达林顿接法采用非达林顿接法，外接三极管可以达到饱和，当达到深度饱和时，由于基区存储了相当的电荷，所以三极管关断的延时就比较长，这就延长了开关导通时间，影响开关频率。

达林顿接法虽然不会饱和，但开关导通时压降较大，所以效率也会降低。

可以采用抗饱和驱动技术，图4所示，此驱动电路可以将Q1的 Vce保持在 0.7V以上，使其导通在弱饱和状态。

CE8503-EN-02-DCDC-1A

SYMBOL VIN
PD Topr
Junction Temperature
Tj
Storage Temperature Soldering Temperature & Time ESD HBM(Human Body Mode)
ESD MM(Machine Mode)
Tstg Tsolder
-
RATINGS VSS-0.3~VSS+7.5 VSS-0.3~VIN+0.3
Reference Voltage Line Regulation
TA = 25℃
0.588 0.600 0.612 V
TA = 0℃ ≤TA ≤85℃
0.586 0.600 0.613
V
TA = -40℃ ≤TA ≤85℃ 0.585 0.600 0.615
V
VIN =2.7V to 5.5V
-
0.04 0.40 %/V
ISW=100mA ISW=-100mA VIN= 3V, VOUT =90%
300 450 mΩ
300 450 mΩ
1.5
A
0.2
" Voltage(1) EN "Low" Voltage(2)
EN Leakage Current
VENH VENL
7.3
V
1.5
VIN
V
PIN CONFIGURATION:
ORDER INFORMATION:
CE8503①②
DESIGNATOR
① ②
SYMBOL
A M
DESCRIPTION
Standard Package：SOT23-5

AS8301高效 PFM 同步升压 DC-DC 变换器

0.4*VOUT
振荡特性
最高振荡频率
FMAX
300
振荡占空比
DCOSC
83
VOUT
V
0.8
V
V
2.5
%
1000
mA
uA
uA
1
uA
95
%
V
0.2
V
KHz %
深圳市鑫丰微科技有限公司
6
座机０７５５－３３２３６１６５
SALS823041 高效 PFM 同步升压 DC-DC 变换器
典型曲线
除非特别说明，CIN =47uF，COUT =100uF，L1 =47uH，TA =25oC
1
2
3
GND VOUT LX
(TO92) 123
GND LX VOUT
深圳市鑫丰微科技有限公司
3
座机０７５５－３３２３６１６５
AS8301 高效 PFM 同步升压 DC-DC 变换器
管脚定义
管脚序号
SOT23 SOT23-5 SOT89-3
2
5
3
3
2
2
-
1
-
1
4
1
-
3
-
TO92
2 3 1 -
管脚管脚名称类型
深圳市鑫丰微科技有限公司
1
座机０７５５－３３２３６１６５
典型应用电路图
VIN
L1 CIN
பைடு நூலகம்
AS8301 高效 PFM 同步升压 DC-DC 变换器
LX
VOUT
GND
EN
COUT
VOUT
图 1：AS8301 典型应用电路图

常用开关电源芯片大全

第1章DC-DC电源转换器/基准电压源DC-DC电源转换器1.低噪声电荷泵DC-DC电源转换器AAT3113/AAT31142.低功耗开关型DC-DC电源转换器ADP30003.高效3A开关稳压器AP15014.高效率无电感DC-DC电源转换器FAN56605.小功率极性反转电源转换器ICL76606.高效率DC-DC电源转换控制器IRU30377.高性能降压式DC-DC电源转换器ISL64208.单片降压式开关稳压器L49609.大功率开关稳压器L4970A降压式开关稳压器L4971高效率单片开关稳压器L4978高效率升压/降压式DC-DC电源转换器L5970降压式DC-DC电源转换器LM157214.高效率1A降压单片开关稳压器LM1575/LM2575/LM2575HV降压单片开关稳压器LM2576/LM2576HV16.可调升压开关稳压器LM2577降压开关稳压器LM259618.高效率5A开关稳压器LM267819.升压式DC-DC电源转换器LM2703/LM270420.电流模式升压式电源转换器LM273321.低噪声升压式电源转换器LM275022.小型75V降压式稳压器LM500723.低功耗升/降压式DC-DC电源转换器LT107324.升压式DC-DC电源转换器LT161525.隔离式开关稳压器LT172526.低功耗升压电荷泵LT175127.大电流高频降压式DC-DC电源转换器LT176528.大电流升压转换器LT193529.高效升压式电荷泵LT193730.高压输入降压式电源转换器LT1956升压式电源转换器LT196132.高压升/降压式电源转换器LT343333.单片3A升压式DC-DC电源转换器LT343634.通用升压式DC-DC电源转换器LT346035.高效率低功耗升压式电源转换器LT3464升压式DC-DC电源转换器LT346737.大电流高效率升压式DC-DC电源转换器LT378238.微型低功耗电源转换器LTC1754单片同步降压式稳压器LTC187540.低噪声高效率降压式电荷泵LTC191141.低噪声电荷泵LTC3200/LTC3200-542.无电感的降压式DC-DC电源转换器LTC325143.双输出/低噪声/降压式电荷泵LTC325244.同步整流/升压式DC-DC电源转换器LTC340145.低功耗同步整流升压式DC-DC电源转换器LTC340246.同步整流降压式DC-DC电源转换器LTC340547.双路同步降压式DC-DC电源转换器LTC340748.高效率同步降压式DC-DC电源转换器LTC341649.微型2A升压式DC-DC电源转换器LTC3426两相电流升压式DC-DC电源转换器LTC342851.单电感升/降压式DC-DC电源转换器LTC344052.大电流升/降压式DC-DC电源转换器LTC3442同步升压式DC-DC电源转换器LTC345854.直流同步降压式DC-DC电源转换器LTC370355.双输出降压式同步DC-DC电源转换控制器LTC373656.降压式同步DC-DC电源转换控制器LTC377057.双2相DC-DC电源同步控制器LTC380258.高性能升压式DC-DC电源转换器MAX1513/MAX151459.精简型升压式DC-DC电源转换器MAX1522/MAX1523/MAX152460.高效率40V升压式DC-DC电源转换器MAX1553/MAX155461.高效率升压式LED电压调节器MAX1561/MAX159962.高效率5路输出DC-DC电源转换器MAX156563.双输出升压式DC-DC电源转换器MAX1582/MAX1582Y64.驱动白光LED的升压式DC-DC电源转换器MAX158365.高效率升压式DC-DC电源转换器MAX1642/MAX1643降压式开关稳压器MAX164467.高效率升压式DC-DC电源转换器MAX1674/MAX1675/MAX167668.高效率双输出DC-DC电源转换器MAX167769.低噪声1A降压式DC-DC电源转换器MAX1684/MAX168570.高效率升压式DC-DC电源转换器MAX169871.高效率双输出降压式DC-DC电源转换器MAX171572.小体积升压式DC-DC电源转换器MAX1722/MAX1723/MAX172473.输出电流为50mA的降压式电荷泵MAX173074.升/降压式电荷泵MAX175975.高效率多路输出DC-DC电源转换器MAX1800同步整流降压式稳压型MAX1830/MAX183177.双输出开关式LCD电源控制器MAX187878.电流模式升压式DC-DC电源转换器MAX189679.具有复位功能的升压式DC-DC电源转换器MAX194780.高效率PWM降压式稳压器MAX1992/MAX199381.大电流输出升压式DC-DC电源转换器MAX61882.低功耗升压或降压式DC-DC电源转换器MAX629升压式DC-DC电源转换器MAX668/MAX66984.大电流PWM降压式开关稳压器MAX724/MAX72685.高效率升压式DC-DC电源转换器MAX756/MAX75786.高效率大电流DC-DC电源转换器MAX761/MAX76287.隔离式DC-DC电源转换器MAX8515/MAX8515A88.高性能24V升压式DC-DC电源转换器MAX872789.升/降压式DC-DC电源转换器MC33063A/MC34063A升压/降压/反向DC-DC电源转换器MC33167/MC3416791.低噪声无电感电荷泵MCP1252/MCP125392.高频脉宽调制降压稳压器MIC220393.大功率DC-DC升压电源转换器MIC229594.单片微型高压开关稳压器NCP1030/NCP103195.低功耗升压式DC-DC电源转换器NCP1400A96.高压DC-DC电源转换器NCP140397.单片微功率高频升压式DC-DC电源转换器NCP141098.同步整流PFM步进式DC-DC电源转换器NCP142199.高效率大电流开关电压调整器NCP1442/NCP1443/NCP1444/NCP1445 100.新型双模式开关稳压器NCP1501101.高效率大电流输出DC-DC电源转换器NCP1550102.同步降压式DC-DC电源转换器NCP1570103.高效率升压式DC-DC电源转换器NCP5008/NCP5009104.大电流高速稳压器RT9173/RT9173A105.高效率升压式DC-DC电源转换器RT9262/RT9262A106.升压式DC-DC电源转换器SP6644/SP6645107.低功耗升压式DC-DC电源转换器SP6691108.新型高效率DC-DC电源转换器TPS54350109.无电感降压式电荷泵TPS6050x110.高效率升压式电源转换器TPS6101x恒流白色LED驱动器TPS61042112.具有LDO输出的升压式DC-DC电源转换器TPS6112x113.低噪声同步降压式DC-DC电源转换器TPS6200x114.三路高效率大功率DC-DC电源转换器TPS75003115.高效率DC-DC电源转换器UCC39421/UCC39422控制升压式DC-DC电源转换器XC6371117.白光LED驱动专用DC-DC电源转换器XC9116同步整流降压式DC-DC电源转换器XC9215/XC9216/XC9217119.稳压输出电荷泵XC9801/XC9802120.高效率升压式电源转换器ZXLB1600线性/低压差稳压器121.具有可关断功能的多端稳压器BAXXX122.高压线性稳压器HIP5600123.多路输出稳压器KA7630/KA7631124.三端低压差稳压器LM2937125.可调输出低压差稳压器LM2991126.三端可调稳压器LM117/LM317127.低压降CMOS500mA线性稳压器LP38691/LP38693128.输入电压从12V到450V的可调线性稳压器LR8 非常低压降稳压器（VLDO）LTC3025130.大电流低压差线性稳压器LX8610负输出低压差线性稳压器MAX1735低压差线性稳压器MAX8875133.带开关控制的低压差稳压器MC33375134.带有线性调节器的稳压器MC33998低压差固定及可调正稳压器NCP1117136.低静态电流低压差稳压器NCP562/NCP563137.具有使能控制功能的多端稳压器PQxx138.五端可调稳压器SI-3025B/SI-3157B低压差线性稳压器SPX2975140.五端线性稳压器STR20xx141.五端线性稳压器STR90xx142.具有复位信号输出的双路输出稳压器TDA8133143.具有复位信号输出的双路输出稳压器TDA8138/TDA8138A 144.带线性稳压器的升压式电源转换器TPS6110x145.低功耗50mA低压降线性稳压器TPS760xx146.高输入电压低压差线性稳压器XC6202147.高速低压差线性稳压器XC6204148.高速低压差线性稳压器XC6209F149.双路高速低压差线性稳压器XC6401基准电压源150.新型XFET基准电压源ADR290/ADR291/ADR292/ADR293151.低功耗低压差大输出电流基准电压源MAX610x152.低功耗基准电压源MAX6120精密基准电压源MC1403基准电压源MCP1525/MCP1541155.低功耗精密低压降基准电压源REF30xx/REF31xx156.精密基准电压源TL431/KA431/TLV431A第2章AC-DC转换器及控制器1.厚膜开关电源控制器DP104C2.厚膜开关电源控制器DP308P系列高电压功率转换控制器DPA423/DPA424/DPA425/DPA4264.电流型开关电源控制器FA13842/FA13843/FA13844/FA138455.开关电源控制器FA5310/FA5311开关电源控制器FAN75567.绿色环保的PWM开关电源控制器FAN7601型开关电源控制器FS6M07652R9.开关电源功率转换器FS6Sxx10.降压型单片AC-DC转换器HV-2405E11.新型反激准谐振变换控制器ICE1QS01电源功率转换器KA1M088013.开关电源功率转换器KA2S0680/KA2S088014.电流型开关电源控制器KA38xx型开关电源功率转换器KA5H0165R型开关电源功率转换器KA5Qxx型开关电源功率转换器KA5Sxx18.电流型高速PWM控制器L499019.具有待机功能的PWM初级控制器L599120.低功耗离线式开关电源控制器L6590SWITCH TN系列电源功率转换器LNK304/LNK305/LNK306 SWITCH系列电源功率转换器LNK500/LNK501/LNK52023.离线式开关电源控制器M51995A电源控制器M62281P/M62281FP25.高频率电流模式PWM控制器MAX5021/MAX502226.新型PWM开关电源控制器MC4460427.电流模式开关电源控制器MC4460528.低功耗开关电源控制器MC4460829.具有PFC功能的PWM电源控制器ML482430.液晶显示器背光灯电源控制器ML487631.离线式电流模式控制器NCP120032.电流模式脉宽调制控制器NCP120533.准谐振式PWM控制器NCP120734.低成本离线式开关电源控制电路NCP121535.低待机能耗开关电源PWM控制器NCP1230系列自动电压切换控制开关STR8xxxx37.大功率厚膜开关电源功率转换器STR-F665438.大功率厚膜开关电源功率转换器STR-G865639.开关电源功率转换器STR-M6511/STR-M652940.离线式开关电源功率转换器STR-S5703/STR-S5707/STR-S570841.离线式开关电源功率转换器STR-S6401/STR-S6401F/STR-S6411/STR-S6411F 442.开关电源功率转换器STR-S651343.离线式开关电源功率转换器TC33369～TC3337444.高性能PFC与PWM组合控制集成电路TDA16846/TDA1684745.新型开关电源控制器TDA1685046.“绿色”电源控制器TEA150447.第二代“绿色”电源控制器TEA150748.新型低功耗“绿色”电源控制器TEA153349.开关电源控制器TL494/KA7500/MB3759SwitchⅠ系列功率转换器TNY253、TNY254、TNY255SwitchⅡ系列功率转换器TNY264P～TNY268GSwitch（Ⅱ）系列离线式功率转换器TOP209～TOP227Switch-FX系列功率转换器TOP232/TOP233/TOP234Switch-GX系列功率转换器TOP242～TOP25055.开关电源控制器UCX84X56.离线式开关电源功率转换器VIPer12AS/VIPer12ADIP57.新一代高度集成离线式开关电源功率转换器VIPer53第3章功率因数校正控制/节能灯电源控制器1.电子镇流器专用驱动电路BL83012.零电压开关功率因数控制器FAN48223.功率因数校正控制器FAN75274.高电压型EL背光驱动器HV826场致发光背光驱动器IMP525/IMP5606.高电压型EL背光驱动器/反相器IMP8037.电子镇流器自振荡半桥驱动器IR21568.单片荧光灯镇流器IR21579.调光电子镇流器自振荡半桥驱动器IR215910.卤素灯电子变压器智能控制电路IR216111.具有功率因数校正电路的镇流器电路IR216612.单片荧光灯镇流器IR216713.自适应电子镇流器控制器IR252014.电子镇流器专用控制器KA754115.功率因数校正控制器L656116.过渡模式功率因数校正控制器L656217.集成背景光控制器MAX8709/MAX8709A18.功率因数校正控制器MC33262/MC3426219.固定频率电流模式功率因数校正控制器NCP1653场致发光灯高压驱动器SP440321.功率因数校正控制器TDA4862/TDA486322.有源功率因数校正控制器UC385423.高频自振荡节能灯驱动器电路VK05CFL24.大功率高频自振荡节能灯驱动器电路VK06TL第4章充电控制器1.多功能锂电池线性充电控制器AAT36802.可编程快速电池充电控制器BQ20003.可进行充电速率补偿的锂电池充电管理器BQ20574.锂电池充电管理电路BQ2400x5.单片锂电池线性充电控制器BQ2401x接口单节锂电池充电控制器BQ2402x同步开关模式锂电池充电控制器BQ241008.集成PWM开关控制器的快速充电管理器BQ29549.具有电池电量计量功能的充电控制器DS277010.锂电池充电控制器FAN7563/FAN7564线性锂/锂聚合物电池充电控制器ISL629212.锂电池充电控制器LA5621M/LA5621V通用充电控制器LT1571恒流/恒压电池充电控制器LT176915.线性锂电池充电控制器LTC173216.带热调节功能的1A线性锂电池充电控制器LTC173317.线性锂电池充电控制器LTC173418.新型开关电源充电控制器LTC198019.开关模式锂电池充电控制器LTC4002锂电池充电器LTC400621.多用途恒压/恒流充电控制器LTC4008锂离子/锂聚合物电池充电控制器LTC405223.可由USB端口供电的锂电池充电控制器LTC405324.小型150mA锂电池充电控制器LTC405425.线性锂电池充电控制器LTC405826.单节锂电池线性充电控制器LTC405927.独立线性锂电池充电控制器LTC406128.镍镉/镍氢电池充电控制器M62256FP29.大电流锂/镍镉/镍氢电池充电控制器MAX150130.锂电池线性充电控制器MAX150731.双输入单节锂电池充电控制器MAX1551/MAX155532.单节锂电池充电控制器MAX167933.小体积锂电池充电控制器MAX1736接口单节锂电池充电控制器MAX181135.多节锂电池充电控制器MAX187336.双路输入锂电池充电控制器MAX187437.单节锂电池线性充电控制器MAX189838.低成本/多种电池充电控制器MAX190839.开关模式单节锂电池充电控制器MAX1925/MAX192640.快速镍镉/镍氢充电控制器MAX2003A/MAX200341.可编程快速充电控制器MAX712/MAX71342.开关式锂电池充电控制器MAX74543.多功能低成本充电控制器MAX846A44.具有温度调节功能的单节锂电池充电控制器MAX8600/MAX860145.锂电池充电控制器MCP73826/MCP73827/MCP7382846.高精度恒压/恒流充电器控制器MCP73841/MCP73842/MCP73843/MCP73844 647.锂电池充电控制器MCP73861/MCP7386248.单节锂电池充电控制器MIC7905049.单节锂电池充电控制器NCP180050.高精度线性锂电池充电控制器VM7205。

lt3724 高压电流模式降压转换器演示电路 dc736a 用户手册说明书

Description High Voltage Current Mode Step-Down ConverterDemonstration Circuit 736A is a 200kHz high voltage, current-mode DC/DC step-down converter featuring the L T®3724.The circuit operates from a V IN range of 30V to 55V and outputs 24V at 3A (72W). A soft-start feature controls the output voltage slew rate at start-up, reducing current surges and voltage overshoots. Burst Mode® operation that improves the efficiency at light loads can be enabled with a jumper.An optional boost bias circuit is provided on the bottom side of the board for back-driving the LT3724 internal regulator from the output voltage. Customers might want to use this optional circuit with modified applications that have relatively high input voltages and low (~5V) output voltages. In such applications, the optional circuit can increase the overall efficiency by reducing the power lostperformance summary in the LT3724. The demonstration circuit has also been layed out with the option for a second switching MOSFET to facilitate higher output currents. The circuit design can be modified for a boost converter configuration.This circuit is suitable for a wide range of Industrial control systems and particularly suitable for 12V/42V automotive applications and 48V Telecom power supplies.The LT3724 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. Design files for this circuit board are available at /demoL, L T, L TC, L TM, Linear Technology, the Linear logo and Burst Mode are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.Specifications are at T A = 25°CPARAMETER CONDITIONS MIN TYP MAX UNITS Input Voltage Range3055VEfficiency V IN = 30V, I OUT = 3.0AV IN = 48V, I OUT = 3.0AV IN = 55V, I OUT = 3.0A 97.495.494.7%%%Switching Frequency200kHz Output Voltage I OUT = 0A to 3.0A24V Output Voltage Ripple V IN = 48V, I OUT = 3.0A 100mV1dc736af2dc736afQuick start proceDureDC736A is easy to set up to evaluate the performance of the LT3724. Refer to Figure 1 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 oscil-loscope probe. See Figure 2 for the proper scope technique. 1. Place JP1 in the RUN position.2. Place JP2 in the desired operating mode: fixed frequency or Burst Mode operation.3. With power off, connect the input power supply to V IN and GND.4. With power off, connect the load to V OUT and GND.5. Turn on the power at the input and adjust the input voltage until the LT3724 turns on. NOTE: Make sure that the input voltage does not exceed 55V.6. 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.7. Once the proper output voltage is established, adjust the input voltage and load within the operating range and observe the output voltage regulation, ripple voltage,efficiency and other parameters.Figure 1. Proper Measurement Equipment SetupFigure 2. Measuring Output Rippleparts ListITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER11CIN1Cap., Aluminum 68µF 63V 20%Sanyo 63MV68AX-T22CIN2, CIN3 Cap., X7R 2.2µF 100V 20%TDK C4532X7R2A225M31COUT1 Cap., Alum 330µF 35V 10%Sanyo 35CV330AX-T42COUT3, COUT2 Cap., X7R 22µF 25V 20%TDK C5750X7R1E226M51C1 Cap., NPO 1000pF 100V 10%AVX 08051A102KAT1A61C2 Cap., X5R 0.22µF 16V 10%Taiyo Yuden EMK107BJ224KA71C3 Cap., X7R 1000pF 25V 10%AVX 04023C102KAT2A81C4 Cap., X5R 0.1µF 16V 10%AVX 0402YD104KAT2A91C5 Cap., X5R 1µF 16V 10%Taiyo Yuden EMK212BJ105KG101C6 Cap., X7R 120pF 25V 10%AVX 04023C121KAT2A111C7 Cap., X7R 1500pF 16V 20% 0402AVX 0402YC152MAT2A121C12Cap., X7R 0.01µF 16V 10%AVX 0402YC103KAT2A131D1 Diode, Speed Switching Diodes Inc. BAS19141D2 Schottky Diode 60V IR 30BQ060151D5Diode, 75V/200mW Diodes Inc. 1N4148WS161L1 Inductor, 47µH Coilcraft DO5040H-473MLB171Q1 MOSFET N-Channel, PowerPak SO8 Vishay Siliconix Si7852DP181R1 Res, Chip 1M 0.1W 5%AAC CR10-105JM191R2 Res/Jumper, Chip 0Ω 0.06W 1A AAC CJ05-000M201R3 Res., Chip 52.3k 1/16W 1%Vishay CRCW0402 52.3K 1%211R4 Res., Chip 402K 1/16W 1%AAC CR05-4023FM221R5 Res., 0.025 0.5W 1%IRC LRF2010-01-R025-F231R6 Res., Chip 1M 0.1W 5%AAC CR16-105JM241R7 Res., Chip 4.99k 0.06W 1%AAC CR05-4991FM251R8 Res., Chip 93.1k 1/16W 1%AAC CR05-9312FM261R9 Res., Chip 2.21k 1/16W 1%AAC CR05-2211FM271R14Res., Chip 470 1/16W 5%AAC CR05-471JM281R15Res., Chip 47k 1/16W 5%AAC CR05-473JM291U1 I.C., Voltage Regulator Linear Technology Corporation LT3724EFE Additional Demo Board Circuit Components10C8 Cap., X5R C-4.7µF, 6.3V-0805 6.3V 20%Taiyo Yuden JMK212BJ475MG-T20C9 Cap., X5R 1µF 16V 20%Taiyo Yuden EMK212BJ105MG30C10 Cap., NPO 220pF 25V 10%AVX 04023A221KAT2A40C11Cap., Aluminum 22µF 35V 10%Sanyo 35MV22UAX50D3,D4 Schottky Diode, 40V Zetex ZHCS40060L2 Inductor, L-10µH Murata LQH3C100M2470R10 Res./Jumper, Chip 0Ω 0.06W 1A AAC CJ05- 000M80R11 Res., Chip 107k 0.06W 1%AAC CR05-1073FM90R12 Res., Chip 10k 0.06W 5%AAC CR05-103JM100R13 Res., Chip 12.4k 1/16W 1%AAC CR05-1242FM110U2 I.C., Voltage Regulator Linear Technology Corporation LT1613CS53dc736afparts ListITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Hardware – For Demo Board Only14E1, E2, E3, E4 Testpoint, Turret Mill Max 2501-220E5 Testpoint, Turret Mill Max 2501-232JP2, JP1 Headers, 3 Pins 2mm Ctrs. Comm Con Connectors 2802S-03G242XJP1, XJP2JMP, 3 Pin 1 Row .079CC Comm Con Connectors CCIJ2MM-138GW 4dc736af5dc736afInformation 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 Diagram6dc736afLinear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7417(408) 432-1900 ● FAX : (408) 434-0507 ● www.linear .comLINEAR TECHNOLOGY CORPORA TION 2012LT 0912 • 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。

DC DC变换器控制电路34063

DC/DC变换器控制电路340631．概述34063是一单片双极型线性集成电路，专用于直流－直流变换器的控制部分，片内包括温度补偿带隙基准源，一个占空比周期控制器，驱动器和大电流输出开关，能输出1.5A的开关电流。

它具备以下特点：○1能在3.0V~40V的输入电压下工作; ○2短路电流限制; ○3低静态电流;○4输出开关电流可达1.5A（无外接三极管）;○5输出电压可调; ○6工作振荡频率从100Hz到100KHz;○7可构成升压，降压和反向电源变换器。

2．内部框图及工作原理2．1内部框图图1 .34063内部框图2．2工作原理振荡器通过恒流源对外接在CT管脚（3脚）上的定时电容不断地充电和放电，以产生振荡波形，充电和放电的电流都是恒定的，所以振荡频率决定于外接定时电容的容量。

与门的C输入端在振荡器对外充电时为高电平，D输入端在比较器的输入电平低于阈值电平时为高电平。

当C和D的输入端都变成高电平时，触发器被置为高电平，输出开关管导通。

反之，到振荡器在放电期间，C输入端为低电平，触发器被复位，使得输出开关管处于关闭状态。

电流限制检测端Is通过检测连接在V＋和7脚之间电阻上的压降来完成功能。

当检测到电阻上的电压降接近超过300mV时，电流限制电路开始工作。

这时通过CT管脚（3脚）对定时电容进行快速充电，以减少充电时间和输出开关管的导通时间，结果是使得输出开关管的开关时间延长。

3．参数及测试条件：3．1极限参数表1.极限参数表2. 电参数（除非特殊说明：V＋＝5V，Ta＝0～70℃）4．典型应用电路和设计规范：4．1典型应用电路图2 .升压变换器图3 .降压变换器图4 .反向变换器图5 .升压变换器（大电流）图6 .降压变换器（大电流）4．2应用电路设计规范表表4.设计规范表V SA T 输出开关管饱和电压V F整流二极管正向压降t ON输出开关管导通时间t OFF输出开关管关断时间7．封装形式：封装采用塑封双列8引线直插式如图7所示。

drv8803

intellectual property matters and other important disclaimers. PRODUCTION DATA.
English Data Sheet: SLVSAW5
DRV8803
ZHCS219C – JULY 2011 – REVISED NOVEMBER 2015
4 修订历史记录
注：之前版本的页码可能与当前版本有所不同。
Changes from Revision B (February 2012) to Revision C
Page
• 已添加 ESD 额定值表，特性描述部分，器件功能模式，应用和实施部分，电源相关建议部分，布局部分，器件和文档支持部分以及机械、封装和可订购信息部分........................................................................................................................ 1
7.4 Device Functional Modes.......................................... 9 8 Application and Implementation ........................ 10
8.1 Application Information............................................ 10 8.2 Typical Application ................................................. 10 9 Power Supply Recommendations...................... 12 9.1 Bulk Capacitance .................................................... 12 10 Layout................................................................... 13 10.1 Layout Guidelines ................................................. 13 10.2 Layout Example .................................................... 13 10.3 Thermal Consideration.......................................... 13 11 器件和文档支持 ..................................................... 15 11.1 文档支持................................................................ 15 11.2 社区资源................................................................ 15 11.3 商标 ....................................................................... 15 11.4 静电放电警告......................................................... 15 11.5 Glossary ................................................................ 15 12 机械、封装和可订购信息....................................... 15

MC34063芯片原理与应用技巧（车充）

MC34063芯片原理与应用技巧（车充）MC34063芯片原理与应用技巧(车充)1. MC34063 DC/DC变换器控制电路简介：MC34063是一单片双极型线性集成电路，专用于直流-直流变换器。

它能使用很少的外接元件构成开关式升压变换器、降压变换器和电源反向器。

特点：价格便宜0.2元,电路简单,且效率满足一般要求*能在3-40V的输入电压下工作；*低静态电流；*电流限制；*输出电压可调*输出开关电流峰值可达1.5A（平均0.8A）（无外接三极管时）*工作振荡频率从100HZ到100KHZ2.MC34063引脚图及原理框图MC34063 电路原理振荡器通过恒流源对外接在CT 管脚(3 脚)上的定时电容不断地充电和放电以产生振荡。

充电和放电电流都是恒定的，振荡频率仅取决于③脚外接的定时电容。

与门的C 输入端在定时电容充电时为高电平，D 输入端在比较器的输入电平低于阈值电平时为高电平。

当C 和D输入端都变成高电平时触发器被置为高电平，输出开关管导通;反之当振荡器定时电容（③脚上）在放电期间，C 输入端为低电平，触发器被复位，使得输出开关管处于关闭状态。

电流限制通过检测连接在VCC（即6脚）和7 脚之间安全电阻（Rsc）上的压降来实现，当检测到电阻上的电压降接近超过0.3V 时，电流限制电路开始工作，这时通过CT 管脚(3 脚) 对定时电容进行快速充电以减少充电时间和输出开关管的导通时间，结果是使得输出开关管的关闭时间延长。

如⑧②两脚直接连到电源的正负极上，那么，T2上将承受很高的压降：为防T2因承压→发热过大，应在⑧或②外接电阻|电感等负载★。

线性稳压电源效率低，通常不适合于大电流或输入、输出压差大的情况。

开关电源的效率相对较高，按转换方式可分为斩波型、变换器型和电荷泵式，按开关方式可分为软开关和硬开关。

MC34063属于低成本斩波型硬开关。

有一个车用手机充电器（车充），芯片是MC34063，MicroUSB 接口。

180KHz 40V 12A开关电流降压型DC-DC转换器说明书

180KHz 40V 12A 开关电流降压型DC-DC转换器XL4016特点⏹推荐操作电压范围8V~36V ⏹输出电压从1.25V到32V可调⏹最大占空比100%⏹最小压降0.3V⏹固定180KHz开关频率⏹最大12A开关电流⏹内置功率MOS⏹效率高达96%⏹出色的线性与负载调整率⏹内置热关断功能⏹内置限流功能⏹内置输出短路保护功能⏹TO220-5L封装应用⏹LCD电视与显示屏⏹便携式仪器电源⏹通讯设备供电描述XL4016是一款高效降压型DC-DC转换器，固定180KHz开关频率, 可以提供最高12A输出电流能力，具有低纹波，出色的线性与负载调整率特点。

XL4016内置固定频率振荡器与频率补偿电路，简化了电路设计。

PWM控制环路可以调节占空比从0~100%之间线性变化。

内置输出过电流保护功能。

当输出短路时，开关频率从180KHz降至48KHz。

内置补偿模块可以减少外围元器件数量。

图1.XL4016封装180KHz 40V 12A 开关电流降压型DC-DC 转换器 XL4016引脚配置12345VIN SW FB GNDVC TO220-5LMetal Tab SW图2. XL4016引脚配置表1.引脚说明引脚号引脚名称描述1 GND 接地引脚。

2 FB 反馈引脚，通过外部电阻分压网络，检测输出电压进行调整，参考电压为1.25V 。

3 SW 功率开关输出引脚，SW 是输出功率的开关节点。

4VC内部电压调节器旁路电容引脚，需要在VIN 与VC 引脚之间连接1个1uF 电容。

5 VIN电源输入引脚，支持DC8V~36V 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。

180KHz 40V 12A 开关电流降压型DC-DC 转换器 XL4016方框图EAGND FB3.3V1.25VEA COMPOscillator180KHz/48KHz3.3V Regulator1.25V ReferenceStart Up LatchCOMP2COMP1DriverThermal ShutdownVINVC SW220mV 200mV20m ΩCurrent LimitPower PMOS1:100020K Ω3.3nFOSP图3. XL4016方框图典型应用XL4016CIN470uF/50VCOUT1000uF/25VR210K R13.3KD1MBR2045C1105C21055312VIN4VOUT=1.25*(1+R2/R1)IOUT=0~12AVIN VCSWGNDFBCC 105CFF 33nFVOUTVIN=8V~20V, VOUT=5V/9A; VIN=20V~36V, VOUT=5V/12A 图4. XL4016系统参数测量电路（VIN=8~36V, VOUT=5V/12A ）180KHz 40V 12A开关电流降压型DC-DC转换器XL4016订购信息产品型号打印名称封装方式包装类型XL4016E1 XL4016E1 TO220-5L 50只每管/ 1000只每盒XLSEMI无铅产品，产品型号带有“E1”后缀的符合RoHS标准。

数字幅频均衡功率放大器

数字幅频均衡功率放大器——硬件电路设计摘要本文设计了一个基于FPGA的数字信号处理技术的幅频均衡功率放大器（硬件电路）。

系统由前置放大器、低通滤波、带阻网络、AD转换、FPGA数字幅频均衡、DA转换及功率放大电路构成。

前置放大是采用运放NE5532设计的同相比例放大电路，实现了500倍的电压放大，通频带为20hz-20khz，输出电阻为600欧；无源T型带阻滤波器的中心频率是10kHz，衰减为-11.735db；AD转换电路采用16位，转换速率250ksps 的ADS8505芯片，在FPGA设计一个数字幅频参数均衡器,补偿前级带阻网络的频响特性，以达到幅频均衡的目的，通频带20hz-20KHz内的电压幅度波动在1.5db以内。

数字幅频均衡后的信号通过DAC5687（采样率500ksps）转换，并在OCL低频功放电路驱动负载，OCL功率放大电路输出功率大于10W，转换效率大于50%。

基本实现题目要求。

关键字：数字幅频均衡；功率放大器；前置放大；带阻滤波器；ADC;DAC；Digital Amplitude-Frequency Balanced PowerAmplifier——Circuit DesignThis thesis is to design a digital amplitude-frequency balanced amplifier by digital signal processing technology on FPGA . The system is consists of pre-amplifier, low pass filter, band-stop network, A / D sampling, FPGA digital amplitude and frequency equalization circuit, DA conversion and power amplification circuit. Preamplifier is a circuit which Amplifier with the phase ratio consists by NE5532, voltage of 500-fold magnification, when the pass band attenuation -0.56db as 20hz-20khz, output resistance is 600 ohm. The center frequency of passive band-stop filter is 10kHz, the attenuation -11.735db, after sampling the output signal through the AD, in the FPGA ,the design of a digital amplitude and frequency parameters of the equalizer to compensate the former level frequency responsecharacteristics of band-stop networks to achieve the objective of balanced amplitude and frequency - pass band 20hz-20KHz range of the voltage fluctuations within the 1.5db. DA sampling the signal by digital amplitude-frequency balanced into the OCL low-frequency power amplifier circuit and driving the load. The OCL power amplifier circuit output power of 12.6W, conversion efficiency of 65%. This amplifier can better handle the signal to achieve power amplificationKeywords: digital amplitude-frequency equalization; Power Amplifier; Preamplifier; Bandstop filter;A/D;目录第一章绪论 (4)1.1引言 (4)1.2数字幅频均衡功率放大器的优点与应用 (5)1.3本课题的研究任务和论文介绍 (5)1.31 设计的主要任务 (5)1.32 论文的主要内容 (5)第二章方案论证 (6)2.1系统结构介绍 (6)2.2前置放大电路的方案论证 (6)2.3带阻网络电路的方案论证 (6)2.4数字幅频均衡的方案论证 (7)2.5功率放大电路的方案论证 (7)第三章各部分电路设计 (8)3.1前置放大电路 (8)3.11 NE5532的介绍 (8)3.12 同相比例放大电路 (10)3.13 同相比例放大组成的前置放大电路 (11)3.2带阻网络 (12)3.21 滤波器的介绍与分类 (12)3.22 无源带阻滤波器的设计原理 (13)3.23带阻网络的设计过程 (14)3.3数字幅频均衡处理 (17)3.31 A/D转换电路 (17)3.32 数字均衡的理论分析与设计 (21)3.33 D/A转换电路设计 (23)3.4功率放大电路 (25)3.41 原理介绍 (25)3.42 OCL放大器的设计方法 (28)第四章电路调试与性能测试 (34)4.1测试仪器与方法 (34)4.2调试与测试数据 (34)4.3测试结论 (37)第五章结语 (37)5.1论文工作总结 (37)5.2心得体会 (38)致谢 (38)参考文献 (39)附录1：英文翻译—原文 (40)附录2：英文翻译—译文 (45)第一章绪论1.1 引言均衡是指对信道特性的均衡，即接收端的均衡器产生与信道特性相反的特性，用来减小或消除因信道的时变多径传播特性引起的码间干扰.在数字通信系统中插入一种可调滤波器可以校正和补偿系统特性，减少码间干扰的影响。