BQ4802YDW中文资料

合集下载

电动二通阀

电动二通阀电动二通阀是专供中央空调风机盘管的配套产品，由驱动器与阀体两部分组成，驱动器由一个同步电机驱动，具备弹簧复位及手动开阀杠杆操纵功能。

阀体部分采用活塞式结构。

电动阀可与温控器配套使用，由温控器控制电动阀电机，使阀门开或关，实现管道冷水或热水的通或断，再通过风机盘管送风，以实现温度的自动调节。

目录• 电动二通阀-应用范围及产品特点• 工作原理• 电动二通阀-调试•电动二通阀技术参数驱动器规格型号和技术参数铜阀规格型号和技术参数电动二通阀安装尺寸电动二通阀-应用范围及产品特点1.用于控制冷水或热水空调系统管道的开启或关闭，达到控制室温之目的。

2.驱动器由单项磁滞同步马达驱动，阀门弹簧复位，阀门不工作时处于常闭状态，当需要工作时，由温控器提供一个开启信号，使电动阀接通交流电源而动作。

3..开启阀门，冷冻水或热水进入风机盘管，为房间提供冷气或暖气，当室温达到温控器设定值时，温控器令电动阀断电，复位弹簧使阀门关闭，从而截断进入风机盘管的水流，通过阀门关闭和开启，使室温始终保持在温控设定的温度范围内。

4..ZYFT系列电动阀的驱动器与阀门采用螺纹连接方式，可在阀门安装之后，再安装驱动器。

现场装配，接线灵活、方便。

驱动器之平面设计可以贴近墙面安装，占用空间小，产品可靠耐用，工作噪音低，并能在隐蔽式风机盘管装置内常出现的高温高湿环境可靠工作。

执行器选用铸铝支架及塑料外壳，体积小、重量轻★选用永磁同步电机，并带有磁滞离合机构，具有可靠的自我保护功能★适合多种控制信号：增量（浮点）、电压（0～10V）、电流（4～20mA）★具有0～10V或4～20mA反馈信号（选配）★传动齿轮采用金属齿轮，大大提高了驱动器的使用寿命★功耗低、输出力大、噪音小★阀体有铸铜、铸铁、铸钢、不锈钢多种材质可供选择，以适合不同工作介质及温度的要求★阀体有螺纹连接和法兰连接两种，安装方便，其构造符合IEC国际标准★阀体结构形式有两通阀（单座）、两通平衡阀（平衡式）、三通合流和三通分流阀它分为直动式和先导式2种。

JUF4802 型 RS485 串口转 PWM 输出调速器用户手册说明书

*此功能码查询出的信息为调速器根据相关配置实际判断出的风机故障状态， *此功能必须要配合“风机数量”参数及按要求接接风机才能正常使用以 modbus 地址 01，风机数量为 4；3 号风机故障、124 号风机正常运转为例主机发送：01 02 00 01 00 04 28 09 调速器应答：01 02 01 0B E0 4F (0B=1011，也就对应出 3 号风机处于故障状态)
5.4.8 读取全部参数 (03 功能码，寄存器地址 0000~000B) 指令格式：01 03 00 00 00 0C 45 CF (0000：寄存器起始地址，000C：读取 12 个寄存器) 调速器返回： 01 03 18 00A8 0001 0001 0014 465A 0001 0004 0276 0000 0000 0000 0005 CB77 18：返回数据长度，共 24 个字节 00A8 对应寄存器 0000 的值，0001 对应寄存器 0001 的值，以此类推…
3.产品尺寸：
3.1，主板 70mm*46mm，安装孔尺寸：63mm*40mm
3
成都兢志成电子科技有限公司
4.接口说明
tel:028-66570969/18227618314
1 号端子：调速器供电电源﹢极接口（DC12~60V） 2 号端子：调速器供电电源 -极接口 3 号端子：RS485 串口 A / D+， 4 号端子：RS485 串口 B / D-，（5~8 号端子为第 1 路风机的 4 个接线端口，和 14 号端子的 4 针是直通的） 5 号（F1v-）：接 1 号风机的电源线-，6 号（F1v+）：接 1 号风机的电源线+， 7 号（F1-S）：接 1 号风机的转速信号线，8 号（F1-P）：接 1 号风机的 PWM 转速控制线， 13 号位置：LED 指示灯，POW 为整机电源指示灯，FAN 为 PWM 输出指示灯 14~17 号接口：第 1~4 路风机接口，标准 2510-4P 座子（线序：V-，V+，S=FG，P=PWM） *9~12 号为预留端口，不需接线 *全功能接线示意图： *直流电源的电压必须和所接风扇的额定电压一致，且输出电流必须大于风扇电流的总和 *尽可能的不要带电插拔风扇

电液动蝶阀

电液动蝶阀使用说明书江苏创格流体控制有限公司产品简介：该电液执行器具有安装方便、操作简单、液压集成、远程/本地控制等特点，可与蝶阀、球阀等阀门配套使用，目前已广泛应用于石油化工、冶金、水利、船舶、电力管道等多个领域。

结构特点：驱动机构分单作用和双作用，来实现角位移输出采用高保压元件，效率高，可靠性高。

采用侧装结构，体积小可适用于多种工况。

主要功能：具有本地/远程控制功能系统带液压锁，能更好地锁住压力该电液动机构执行器具有阀位反馈，能直接的看出阀处在什么状态，当执行机构断电的时，可采用手动应急泵对其应急。

规格：执行机构机构部分形式：电液动蝶阀主要由二部分组成：电液动执行器和蝶阀。

防护等级及执行标准：IP67使用环境温度（整机）：-10℃~+70℃液压微动力单元H1采用贺尔碧格自动化技术有限公司。

具有响应快速，运行平稳，力矩输出恒定等特点。

液压部分:液压油牌号：N46#抗磨耐压油液压回路：柱塞泵、液压集成块、油箱等组成柱塞泵：电制：220V/50Hz功率：300W转速：3000r/min最大工作电流：4A过载保护：温度开关，设定值140℃工作原理：电器控制部分构成：控制模块、电机驱动模块以及过载保护模块、电源模块等组成。

阀位反馈形式：安装在齿轴顶部。

防护等级：IP67反馈元件：行程开关（寿命可达1万次全程往复运动）蝶阀：蝶阀介质压力：≤1.0MPA蝶阀适用介质：淡水、海水、各种油品及酸碱类电液动蝶阀特点：动作灵敏，运行平稳，能有效缓冲外来的冲击力，行程控制准确，可以带负荷启动，并具有超负荷保护能力。

由于采用机、电、液一体化全封闭结构，工作油路循环于无压的封闭钢筒里，体积小，不漏油，便于安装，维修。

在恶劣的工作环境下，不吸尘，不进水，内部不锈蚀，使用寿命长。

电液动蝶阀工作原理：电液动蝶阀以柱塞泵动力源，通过动力泵输出压力油，经油路集成块的控制送至油缸，实现齿条往复运动，同时通过齿轴转动阀轴、阀板作90度范围内旋转，达到开启关闭阀门。

西门子BQD CQD型号电源保护器产品指南说明书

/bqdGeneral informationThe BQD and CQD type circuit breakers are 1 inch pole width similar to the BQ, BL and EL type circuit breakers. They are available in 1, 2, or 3 pole configurations, with voltage ratings of 120, 240, 277 and 480/277V AC and interruption ratings up to 65,000 amperes.Due to their compact size, the BQD/CQD type circuit breakers are well suited for OEM designed equipment in both light commercial and industrial applications.SpecificationsBQD/CQD breaker 1, 2, 3 poles15-100 amperes, 120, 240, 277, 480/277V AC 50, 60 Hz 125, 125/250V DCBQD6/CQD6 breaker (CSA only) 1, 2, 3 poles15-70 amperes, 600/347V AC 50/60 Hz 125, 125/250V DCApplication• 1, 2, 3 poles 15-100 amperes are HCAR marked • 1 pole 15-20 amperes SWD marked for flourescent lighting applications• 15-30A BQD/CQD are IEC 60947-2 (CE mark) • 1 pole 15-50 amperes tested and marked HID • Suitable for reverse feed applications• CQD/CQD6 – Independently mounted on customer supplied DIN rail or bolted directly to surface• Not suitable for 3 phase delta 480V AC grounded “B” phase applicationsTerminal connectors UL listed for 60/75 CU AL4number BQD215 5BQD315 5BQD220 5BQD320 5BQD225 5BQD325 5BQD230 5BQD330 5Ordering information1 SWD rated for switching fluorescent lighting.2 HID rated at 277V AC.3 Not suitable for 3-phase delta 480V applications.4 HACR rated.5 HID rated at 480Y/277V AC.6 Applicable for 15-30A breakers only.7 BQD6/CQD6 are CSA only – not UL listed.3number numbernumber CQD115 1 2CQD215 2CQD315 2CQD120 1 2CQD220 2CQD320 2CQD125 2CQD225 2CQD325 2CQD130 2CQD230 2CQD330 2CQD135 2CQD235 2Ordering information1 SWD rated.Note: CQD breakers are UL Listed for reverse feed applications. 2 HID rated.3 HACR rated4 Applicable for 15-30A breakers only.5 BQD6/CQD6 are CSA only – not UL listed.Internal accessoriesMounted left side only, not available on single pole breakers.Shunt trip, auxiliary switches, and alarm switches are operational devices that are contained within an add-on module for the BQD/CQD frame circuit breakers. One module can be attached to the left side only of the circuit breaker. Each module can be installed in the field.Shunt trip – A shunt trip is used to trip the breaker remotely.It is operated by providing voltage to the shunt trip coil. The coil in this device is designed to be energized only momentarily, so included is a built-in limit switch which opens the coil circuit after the breaker trips. With the circuit breaker in the tripped position, voltage cannot be applied through the coil circuit due to the open contacts in the limit switch. The operational range of this device is (70 to 110%) of the marked voltage rating.Auxiliary switches – Auxiliary switches are used for remote indication of breaker contact position (ON or OFF). Each switch consists of “A” (normally open) and “B” (normally closed) contact with a common connection. These devices are typically used for signaling purposes.Alarm switch – The alarm switch provides indication of breaker tripping. Alarm contacts operate off of the tripping mechanism of the circuit breaker and only change state when the breaker is tripped. Each alarm switch consists of 1 “A” (normally open) and 1 “B” (normally closed) contact, with a common connection. Sometimes these are also called Bell Alarms.Auxiliary and alarm switch contactsBQDCQDHandle Padlocking Device BQDHBDHandle Blocking Device BQDPLDFace mounting plate 1 pole CQDFMB12-pole CQDFMB2 3-pole CQDFMB3Mounting Hardware Kit CQDSMKBQD outline drawings45-100ALUG STYLETYPICAL25-40ATYPICALLUG STYLE15-20ATYPICALWIRE CLAMPLINECQD outline drawings2X .03.19 1.472.942X .0345-100A15-40ATYPICAL TYPICALLUG STYLE LUG STYLE2X .03SEE 800145 SHEET 1 OF 2 FOR OUTLINE DRAWING GENERAL NOTES..191STD DIN MOUNTING RAIL.SEE NOTE 2.DIN RAIL MOUNTING CLIPHANDLE POLE ONLYNOTESPublished bySiemens Industry, Inc. 2020.Siemens Industry, Inc.3617 Parkway LnPeachtree Corners, GA 30092For more information, please contactour Customer Support Center.Phone: 1-800-241-4453E-mail: *******************/bqdOrder No.: CBPG-BQDCQ-0820Printed in U.S.A.All rights reserved.© 2020 Siemens Industry, Inc.The technical data presented in this document is based on an actual case or on as-designed parameters, and therefore should not be relied upon for any specific application and does not constitute a performance guarantee for any projects. Actual results are dependent on variable conditions. Accordingly, Siemens does not make representations, warranties, or assurances as to the accuracy, currency or completeness of the content contained herein. If requested, we will provide specific technical data or specifications with respect to any customer’s particular applications. Our company is constantly involved in engineering and development. For that reason, we reserve the right to modify, at any time, the technology and product specifications contained herein.。

一种船闸式开关电源[实用新型专利]

专利名称：一种船闸式开关电源专利类型：实用新型专利
发明人：高为将
申请号：CN201420569991.0申请日：20140929
公开号：CN204145314U
公开日：
20150204
专利内容由知识产权出版社提供
摘要：本实用新型公开了一种船闸式开关电源，包括一级电路、二级电路、三级电路、一次开关、二次开关、一级充电电容和二级充电电容；一级电路、一次开关和一级充电电容依次串联；二级电路并联在一级充电电容的两端，二级电路、二次开关和二级充电电容依次串联；三级电路并联在二级充电电容的两端；一次开关和二次开关不同时闭合；一级电路为整流滤波电路，二级电路为泄压保护电路，三级电路为滤波保护电路。

本实用新型船闸式开关电源可将雷电等意外高压阻拦在电源部分，能有效地保护电子设备。

申请人：江苏农林职业技术学院
地址：212400 江苏省镇江市句容市文昌东路19号江苏农林职业技术学院
国籍：CN
代理机构：南京苏高专利商标事务所(普通合伙)
代理人：王云
更多信息请下载全文后查看。

电液动扇形阀门技术参数

电液动扇形闸门产品介绍
电液动扇形闸门一种包括有左、右阀体、扇形闸板、橡胶密封圈、闸板传动轴、阀体松紧轴的电动扇形闸阀，它是通过阀体松紧轴、导杆、闸板传动轴将扇形闸板夹在左阀体、有波纹管的右阀体的中间并通过阀体传动轴上的链轮的转动而实现阀体的松开和夹紧，阀体传动轴上的拨叉控制扇形闸板在左、右阀体的中间位置而不摩擦密封面，且扇形闸板上增设的金属密封圈满足了密封性能。

本实用新型的结构合理、能满足在温度高、腐蚀性强的介质的工艺要求。

本系列扇形闸门广泛应用于建材、冶金、矿山、电力、化工、轻工、粮食等行业，是各类落料系统的卸料控制装置。

电液动扇形闸门结构特点
本闸门结构简单，采用优质钢板焊接而成，采用电液推杆驱动，运行平稳，故障率低，可以快速切断料流。

电液动扇形阀门性能特点
电液动扇形闸门是根据建材行业的特殊需要，用作水泥熟料库除尘设备的理想卸料装置。

扇形阀门在出料口处设置了防尘罩，避免了灰尘飞扬；扇形阀门采用电液推杆作动力源，取代气缸传动，节约了工程投资成本；扇形阀门阀体采用阶台结构，减少了料流冲击。

电液动扇形阀门技术参数
连接形式：法兰
主体材料：碳钢
公称通径：1000（mm）
适用介质：晶料、固体颗粒物料、粉状物料
材质：碳钢
密封形式：硬密封型
标准：国标
外形：中型
流动方向：单向
驱动方式：电气、电液动、气动
零部件及配件：配件
用途：放料
压力环境：低压
工作温度：常温
类型(通道位置)：二通式。

扬修户外型电动执行机构样本

扬修户外型电动执行机构样本
一、引言
二、产品特点
1.多功能：扬修户外型电动执行机构(DZW、DQW、DJW)具有多种工作
模式，可根据需要进行调节，满足不同的工作需求。

2.高效率：该产品采用先进的电动执行器技术，具有高速度、高精度、高负载能力的优势，提高了工作效率。

3.稳定性强：电动执行机构采用优质材料制造，具有稳定的性能和卓
越的耐用性，能够在恶劣的户外环境中长时间稳定工作。

三、产品结构
1.电动执行器：电动执行器是该产品的核心部件，其采用优质电动机
和纯铜线圈设计，具有高效率、低噪音的特点。

2.传动装置：传动装置采用优质的齿轮和传动带，能够将电动执行器
的力量传递到工作装置上，实现运动控制。

3.控制装置：控制装置采用先进的电子控制技术，能够对电动执行机
构的运动进行精确控制，实现自动化操作。

四、工作原理
扬修户外型电动执行机构(DZW、DQW、DJW)的工作原理是通过电动执
行器产生的转动力驱动传动装置，使工作装置实现运动。

电动执行器接受
控制装置发出的信号，通过内部电路控制电机转动，从而实现工作装置的
运动。

五、应用领域
六、总结
扬修户外型电动执行机构(DZW、DQW、DJW)是一种具有多功能、高效率、稳定性强的电动执行机构产品。

它通过先进的电动执行器技术，实现精确控制和高效率运动。

该产品被广泛应用于户外环境中的门窗、阀门、闸门等工程设备的控制和运动，为城市建设和管理提供了便利。

电磁脉冲阀规格表

电磁脉冲阀总体介绍【直角脉冲阀产品介绍】：直角脉冲阀是脉冲袋式除尘器清灰喷吹系统的压缩空气"开关".受脉冲喷吹控制仪输出信号的控制,对滤袋逐排（室）喷吹清灰,使除尘器的阻力保持在设定的范围之内,以保证除尘器的处理能力和收尘效率.直角脉冲阀为直角式阀,其进出口之间夹角为90°,适合于气包与除尘器喷吹管的安装连接.气流畅通,能提供符合要求的清灰气脉冲.按阀进出口的角度及进气口的形式可分为三种：a) 直角式电磁脉冲阀：阀体进出口成直角，直接受电信号控制的膜片阀；b) 直通式电磁脉冲阀：阀体进出口成180度，直接受电信号控制的膜片阀；c) 淹没式电磁脉冲阀：阀体进气口淹没在气包内，直接受电信号控制的膜片阀。

直角脉冲阀工作原理】膜片把电磁脉冲阀分成前,后二个气室,当接通压缩空气后,压缩空气通过节流孔进入后气室,此时后气室压力将膜片紧贴阀的输出口,电磁脉冲阀处于"关闭"状态.脉冲控制仪的电信号使脉冲阀衔铁移动,阀后气室放气孔打开,后气室迅速失压.膜片后移,压缩空气通过阀输出口喷吹.脉冲处于"开启"状态.脉冲喷吹控制仪电信号消失,电磁脉冲阀衔铁复位,后气室放气孔关闭,后气室压力升高使膜片紧贴阀出口,电磁脉冲阀又处于"关闭"状态.【直角脉冲阀安装方法】脉冲阀输入端（IN）与储气筒金属管相连接,其输出端与除尘箱喷吹管连接,连接螺纹间均填以四氟乙烯生料带紧固密封.优势：1. 电磁脉冲阀型号多样，用途广泛。

2. 系统简单，便于安装，价格低谦。

3. 外漏堵绝，内漏易控，使用安全。

4. 动作快递，功率微小，外形轻巧。

【技术参数】：工作压力：0.3-0.6MPa工作介质：清洁空气电压：DC24V/AC220V 电流：800mA/60mA使用环境：温度℃-65℃空气相对湿度不超过85%使用寿命：100万次或3-5年【安装使用】25. 使用前注意检查元件是否在运输过程中损坏。

BQ2902资料

1Features➤Safely charges two rechargeable alkaline batteries such as Re-newal ®from Rayovac ®➤Terminates pulsed charge with maximum voltage limit ➤Contains LED charge status out-put ➤Features a pin-selectable low-battery cut-off➤Pre-charge qualification indicates fault condition ➤Available in 8-pin 300-mil DIP or 150-mil SOICGeneral DescriptionThe bq2902is a low-cost charger for rechargeable alkaline batteries such as Renewal ®batteries from Rayovac ®.The bq2902combines sensitive,full-charge detection for two recharge-able alkaline cells,with a low-battery cut-off for overdischarge protection.Designed for system integration into a two-cell system,the bq2902can improve the service life of the rechargeable alkaline cells by prop-erly managing the charge and dis-charge.The bq2902requires a voltage limited current source to generate the proper charge pulses for the Renewal ®cell.Each cell is individually monitored to ensure full charge without a damaging overcharge.Charge completion is indicated when the average charge rate falls below approximately 3%of the fast charge rate.A status output is pro-vided to indicate charge in progress,charge complete,or fault indication.The bq2902avoids over-depleting the battery by using the internal end-of-discharge control circuit.The bq2902also eliminates the external power switching transis-tors needed to separately charge individual Renewal cells.For safety,charging is inhibited if the per-cell voltage is greater than 3.0V during charge (closed-circuit voltage),or if the cell voltage is less than 0.4V (open-circuitvoltage).Rechargeable Alkaline Charge/DischargeController ICbq29025/99 C1PN290201.eps8-Pin Narrow DIPor SOIC2348765V SEL BAT 1N BAT 1PDCCHG V SS V SS LRTNDC Charging supply input CHG Battery status outputBAT 1PBattery 1 positive input BAT 1NBattery 1 negative inputV SSBattery 2 negative input IC groundLRTNSystem load returnV SELEnd-of-discharge voltage select input Pin NamesPin ConnectionsPin DescriptionsDC DC supply inputThis input is used to charge the rechargeablealkaline cells and power the bq2902duringcharge.To charge the batteries,this inputshould be connected to a current-source lim-ited to300mA.If the DC input current isgreater than300mA,the power dissipationlimits of the package may be exceeded.TheDC input should also be capable of supplyinga minimum of3.3V and should not exceed5.5V.CHG Charge statusThis open-drain output is used to signify thebattery charging status and is valid onlywhen DC is applied.V SEL End-of-discharge select inputThis three-level input selects the desiredend-of-discharge cut-off voltage for thebq2902.V SEL=BAT1P selects an EDV of1.10V.V SEL floating selects EDV=1.0V.V SEL=V SS selects EDV=0.9.VBAT1P Battery1positive inputThis input connects to the positive terminalof the battery designated BAT1(see Figure3).This pin also provides power to the bq2902when DC is not present.BAT1N Battery1negative inputThis input connects to the negative terminalof the battery designated BAT1(see Figure3).V SS Battery2negative input/IC groundThis input connects to the negative terminalof the battery designated BAT2(see Figure3).LRTN Load returnThis open-drain pull-down output is typi-cally used as a low-side switch.High-sideload switching is also possible with the addi-tion of an external P-FET.Functional DescriptionFigure1is a block diagram outlining the major compo-nents of the bq2902.Figure2illustrates the charge control and display status during a bq2902cycle.Table1outlines the vari-2bq2902Figure 1. Functional Block Diagramous operational states and their associated conditions which are described in detail in the following section. Figure3is an application example.Charge InitiationThe bq2902always initiates and performs a charge cycle whenever a valid DC input is applied.A charge cycle consists of pulse charging the battery and then checking for a termination condition.The charging section ex-plains charging in greater detail.Charge Pre-QualificationAfter DC is applied,the bq2902checks the open-circuit voltage(V OCV)of each cell for an undervoltage condition (V MIN=0.4V)and begins a charge cycle when the V OCV of all cells is above V MIN.If V OCV of any cell is below V MIN,the bq2902enters a charge-pending mode and in-dicates a fault condition(see Table1).The bq2902re-mains in a charge-pending mode until V OCV of each cell is above V MIN.Charge TerminationOnce a charge cycle begins,the bq2902terminates charge when the average charge rate falls below3%of the maximum charge rate.The bq2902also terminates charge when the closed-circuit voltage(V CCV)of any cell exceeds3.0V(V FLT)during charge and indicates a fault condition on the CHG output(see Table1).Charge Re-InitiationIf DC remains valid,the bq2902suspends all charge activity after full-charge termination.A charge cycle is re-initiated when all cell potentials fall below1.4V.The rechargeable alkaline cells,unlike other rechargeable chemistries,do not require a maintenance charge to keep the cells in a fully charged state.The self-discharge rate for the Renewal cells is typically4%per year at room temperature.Charge Status IndicationTable1and Figure2outline the various charge action states and the associated BAT1P,and CHG output states.The charge status output is designed to work with an LED indicator.In all cases,if DC is not present at the DC pin,or if the DC supply is less than the volt-age at the BAT1P pin,the CHG output is held in a high-impedance condition.ChargingThe bq2902controls charging by periodically connecting the DC current-source to the battery stack,not to the in-dividual battery cells.The charge current is pulsed from the internal clock at approximately a80Hz rate on the BAT1P pin.The bq2902pulse charges the battery for approximately 10ms of every12.5ms,when conditions warrant.The bq2902measures the open-circuit voltage(V OCV)of each battery cell during the idle period.If a single-cell poten-3bq2902Notes: 1.V OCV= Open-circuit voltage of each cell between positive and negative leads.2.V CCV= Closed-circuit voltage.Table1.bq2902 Operational Summarytial of any battery is above the maximum open-circuit voltage(V MAX=1.63V±3%),the following pulses are skipped until all cell potentials fall below the V MAX limit.Charging is terminated when the average charge rate falls below approximately3%of the maximum charge rate.Once charging is terminated,the internal charging FET remains off,and the CHG output becomes active per Table1and Figure2.With DC applied,the internal discharge FET will always remain on.End-of-Discharge ControlWhen DC is not present or less than the voltage present on the BAT1P pin,the bq2902power is supplied by the voltage present at the BAT1P pin.In this state,the bat-teries discharge down to the level determined by the V SEL pin.The bq2902monitors the cell voltage of the re-chargeable alkaline cells.If the voltage across any cell is below the voltage speci-fied by the V SEL input,the bq2902disconnects the bat-tery stack from the load by turning the internal discharge FET off.The discharge FET remains off until either the batteries are replaced or DC is reapplied,ini-tiating a new charge cycle.After disconnecting the bat-tery stack from the load,the standby current in the bq2902is reduced to less than1µA.The end-of-discharge voltage(V EDV)is selectable by connecting the V SEL pin as outlined in Table2.Typically,higher dis-charge loads(>200mA)should use a lower discharge voltage cut-off to maximize battery capacity.4bq2902End-of-Discharge Voltage Pin Connection1.10V V SEL= BAT1P1.00V V SEL= Z0.90V V SEL=V SSTable 2.bq2902EDV SelectionsFigure 2.bq2902 Application Diagrambq2902Figure 3.bq2902 Application Example,1.0V EDV5bq2902Absolute Maximum RatingsSymbol Parameter Minimum Maximum Unit NotesDC IN V DC relative to GND-0.37.0VV T DC threshold voltage applied on anypin,excluding the DC pin,relative toGND-0.37.0VT OPR Operating ambient temperature0+70°C Commercial -40+85°C IndustrialT STG Storage temperature-40+85°CT SOLDER Soldering temperature-+260°C10 sec max.I DC DC charging current-400mAI LOAD Discharge current-500mAI OL Output current--mA CHGNote:Permanent device damage may occur if Absolute Maximum Ratings are exceeded.Functional operation should be limited to the Recommended DC Operating Conditions detailed in this data sheet.Exposure to con-ditions beyond the operational limits for extended periods of time may affect device reliability.DC Thresholds(T A= 25°C;V DC= 5.5V)Symbol Parameter Rating Tolerance Unit NotesV MAX Maximum open-circuitvoltage 1.63±3%VV OCV>V MAX inhibits/terminatescharge pulsesV EDV End-of-discharge voltage 0.90±5%V V SEL= BAT2N1.00±5%V V SEL= Z1.10±5%V V SEL= BAT1PV FLT Maximum open-circuitvoltage3.00±5%VV CCV>V FLT terminates charge,in-dicates faultV MIN Minimum battery voltage0.40±5%V V OCV<V MIN inhibits chargeV CE Charge enable 1.40±5%V V OCV<V CE on both cells re-initiates chargeNote:Each DC threshold parameter above has a temperature coefficient associated with it.To determine the coefficient for each parameter,use the following formula:TempcoParameterRating=163.*-0.5mV/°CThe tolerance for these temperature coefficients is 10%.67bq2902DC Electrical Characteristics (T A =T OPR )Symbol ParameterMinimum TypicalMaximum Unit NotesV IH Logic input high V BAT1P - 0.1-V BAT1P V V SEL V IL Logic input low V SS -V SS + 0.1V V SELV OL Logic output low --0.8V I OL =10mA I OL Output current 10--mA @V OL =V SS + 0.8V I CC Supply current --250µA Outputs unloaded,V DC = 5.5VI SB1Standby current --25µA V DC = 0V ,V OCV >V EDV I SB2End-of-discharge standby current --1µA VDC = 0V I L Input leakage --±1µA V SEL I OZ Output leakage in high-Z state -5--µA CHGR DSON On resistance -0.5-ΩDischargeFET;V BAT1P =1.8V I IL Logic input low --70µA V SEL I IH Logic input high -70--µA V SEL I IZ Logic input float -2-2µA V SELI DC DC charging current --300mA V DC DC charging voltage 3.3- 5.5V DC I LOAD Discharge current --400mA V OPOperating voltage1.8- 5.5VBAT 1P Timing(T A =T OPR )Symbol ParameterMinimumTypical MaximumUnit Notest P Pulse period -12.5-ms See Figure 2t PW Pulse width-10-msSee Figure 2Note:Typical is at T A = 25°C.bq2902DE1EC e LGBAA1B1 S8-Pin DIP(PN)8-Pin PN(0.300" DIP)DimensionInches Millimeters Min.Max.Min.Max.A0.1600.180 4.06 4.57A10.0150.0400.38 1.02B0.0150.0220.380.56B10.0550.065 1.40 1.65C0.0080.0130.200.33D0.3500.3808.899.65E0.3000.3257.628.26E10.2300.280 5.847.11e0.3000.3707.629.40G0.0900.110 2.29 2.79L0.1150.150 2.92 3.81S0.0200.0400.51 1.0289bq29028-Pin SOIC Narrow (SN)8-Pin SN (0.150" SOIC )DimensionInchesMillimeters Min.Max.Min.Max.A0.0600.070 1.52 1.78A10.0040.0100.100.25B 0.0130.0200.330.51C 0.0070.0100.180.25D 0.1850.200 4.70 5.08E 0.1500.160 3.81 4.06e 0.0450.055 1.14 1.40H 0.2250.245 5.72 6.22L0.0150.0350.380.89bq2902Data Sheet Revision HistoryChange No.Page No.Description Nature of Change 12Figure 1.Functional Block Diagram Updated block diagram Notes:Change 1 = May 1999 C changes from Jan.1997 B.10bq2902 Ordering Informationbq2902Package Option:PN=8-pin plastic DIPSN=8-pin narrow SOICDevice:bq2902Rechargeable AlkalineCharge/Discharge Controller IC11IMPORTANT NOTICETexas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability.TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements.CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK.In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards.TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI’s publication of information regarding any third party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.Copyright © 1999, Texas Instruments Incorporated。

4809场效应管参数

4809场效应管参数【最新版】目录1.场效应管的基本概念2.场效应管的参数3.场效应管参数的测量方法4.场效应管参数对电路性能的影响5.结论正文一、场效应管的基本概念场效应管（Field Effect Transistor，简称 FET）是一种半导体器件，是基于半导体材料的电子运动方式而设计的。

场效应管是三种主要的晶体管之一，另外两种是双极晶体管和绝缘栅双极晶体管。

场效应管具有高输入阻抗、低噪声和低功耗等特点，在电路设计中有着广泛的应用。

二、场效应管的参数场效应管的参数主要包括：1.源极和漏极之间的电流 ID2.源极和漏极之间的电压 VDS3.栅极和源极之间的电压 VGS4.漏极和栅极之间的电压 VGD5.输入阻抗 Ri6.输出阻抗 Ro7.跨导 Gm8.耗尽电压 Vth9.源极和漏极之间的击穿电压 VDB10.栅极电流 IG三、场效应管参数的测量方法场效应管参数的测量方法主要包括：1.直流参数测量法2.交流参数测量法3.脉冲参数测量法4.小信号参数测量法四、场效应管参数对电路性能的影响场效应管的参数对电路性能有着重要的影响，其中：1.源极和漏极之间的电流 ID 决定了场效应管的放大能力2.源极和漏极之间的电压 VDS 决定了场效应管的工作状态3.栅极和源极之间的电压 VGS 决定了场效应管的导通程度4.漏极和栅极之间的电压 VGD 决定了场效应管的输出特性5.输入阻抗 Ri 决定了场效应管的输入信号强度6.输出阻抗 Ro 决定了场效应管的输出信号强度7.跨导 Gm 决定了场效应管的灵敏度8.耗尽电压 Vth 决定了场效应管的截止电压9.源极和漏极之间的击穿电压 VDB 决定了场效应管的工作稳定性10.栅极电流 IG 决定了场效应管的功耗五、结论场效应管是一种重要的半导体器件，其参数对电路性能有着重要的影响。

1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。

DESCRIPTION (CONTINUED)
The bq4802Y/bq4802LY provides direct connections for a 32.768-kHz quartz crystal and a 3-V backup
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.
TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using TI components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information published by TI regarding third–party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for such altered documentation.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.
Mailing Address:
Texas Instruments
Post Office Box 655303
Dallas, Texas 75265
Copyright 2003, Texas Instruments Incorporated。