《锂电保护芯片 DW01.pdf》由会员分享，可在线阅读，更多相关《锂电保护芯片 DW01.pdf（13页珍藏版）》请在三一文库上搜索。
1、DW01A One-cell Lithium Battery Protection IC General Description 概述概述 The DW01A battery protection IC is designed to protect lithium-ion / polymer battery from damage or degrading the lifetime due to over current for one-cell lithium-ion / polymer battery powered systems. such as cellular phones。 Th
2、e ultra-small package and less required external components make it ideal to integrate the DW01A into the limited space of battery pack. The accurate 50mV overcharging detection voltage ensures safe and full utilization charging. The very low standby current drains little current from the cell while
3、 in storage。 DW01A 电池保护 IC 是专为保护锂离子/锂聚合物电池损坏，或因过电流使用而降低寿 命之锂电池保护系统。诸如蜂窝电话。 DW01A 使用超小型封装， 减少所需的外部组件;非常适用于空间有限的电池组。 准确的 50mV 的过充电检测电压，确保安全和充分充电。及储存时极低的待机电流。 Features 特点特点 High-accuracy voltage detection circuit 高精度电压检测电路 Overcharge detection voltage 过充电检测电压 3.6V to 4.4V Accuracy 精度 50mV Overcharge re
4、lease voltage 过充电解除电压 3.6V to 4.4V Accuracy 精度 50mV Overdischarge detection voltage 过放电检测电压 2.0V to 3.0V Accuracy 精度 100mV Overdischarge release voltage 过放电解除电压 2.0V to 3.4V Accuracy 精度 100mV Discharge overcurrent detection voltage 过放过电流检测电压 0.05V to 0.3V Accuracy 精度 30mV Load short-circuiting detec
5、tion voltage 负载短路检测电压 1.1V Accuracy 精度 100mV Detection delay times are generated by an internal circuit (external capacitors are unnecessary) 内置延迟电路，不需要外接电容即具有延迟保护的功能 Overcharge detection delay time 过充电检测延迟时间 Typical.典型值 80ms Overdischarge detection delay time 过放电检测延迟时间 Typical.典型值 100ms Discharge o
6、vercurrent detection delay time 过放放电流检测延迟时间 Typical.典型值 10ms Load short-circuiting detection delay time 负载短路检测延迟时间 Typical.典型值 300s High voltage tolerance is used for charger connection pins, VM and CO pins are absolute maximum rating28V 充电器充电端子 VM 端子与 CO 端子采用高压元器件设计，额定电压值为 28V 0V battery charge fun
7、ction available 可选择向 0V 电池充电功能或是禁止 0V 电池充电功能 Wide operation temperature range 宽工作温度范围 -40 +85 Low current consumption 低消耗电流 Operation mode 正常操作 Typ. 2.4 A Max. 6.0 A (25) Standby mode 待机电流 Green-mode 休眠功能 Max. 0.1 A (25) Self-recovery function 自恢复功能 Max. 3.0 A (25) Small package 超小型封装 SOT-23-6L Lead
8、-free / Green product 无铅 / 绿色产品封装 Applications 应用应用 Protection IC for One-Cell Lithium-ion 单节锂电池保护电路 Lithium-Polymer Rechargeable Battery Packs 锂离子电池保护电路 Block Diagram 内部结构图内部结构图 Absolute Maximum Ratings 绝对最大额定值绝对最大额定值 (无特殊标注时 Vss=0V，Ta=25 unless otherwise specified) Item 项目项目 Symbol 符号符号 Rating 参数范
9、围参数范围 Unit 单位单位 Input voltage between VDD and VSS 电源电压 VDD VSS= -0.3 VSS= +12 V VM pin input voltage VM 端输入电压 VM VDD - 28 VDD + 0.3 V DO pin output voltage DO 端输出电压 VDO VSS - 0.3 VDD + 0.3 V CO pin output voltage CO 端输出电压 VCO VDD - 28 VDD + 0.3 V Electrical static discharge 静电放电电压 HBM 2 KV MM 200 V
10、Operating Temperature Range 工作温度范围 TOPR - 40 + 85 Storage Temperature Range 储存温度范围 TSTG - 55 + 125 Remarks: Any operation condition exceeds the absolute maximum ratings will damage the IC. 附注：任何超过绝对最大额定值的操作条件，并不能保证芯片处于正常工作状态，并且会造成芯片劣化与损坏。 Product Name List 产品电压版本产品电压版本 Product Over charge Detection
11、Voltage Vdet1 Over charge Release Voltage Vrel1 Over discharge Detection Voltage Vdet2 Over discharge Release Voltage Vrel2 Discharge overcurrent Detection Voltage Vdet3 0V Battery Charge Function Mode Selection 产品名称产品名称 过充电检测电压过充电检测电压 过充电解除电压过充电解除电压 过放电检测电压过放电检测电压 过放电解除电过放电解除电 压压 放电过电流检放电过电流检 测电压测电
12、压 0V 充电充电 休眠功能休眠功能 DW01A 4.3V0.050V 4.1V0.050V 2.4V0.100V 3.0V0.100V 140mV 30mV Available 允许 Auto- recovery 自恢复 Electrical Characteristics 电气参数电气参数 (无特殊标注时 TA = 25 unless otherwise specified) Item 项目项目 Symbol 符号符号 Test Condition 测试条件测试条件 Min. 最小值最小值 Typ. 典型值典型值 Max. 最大值最大值 Unit 单位单位 Operating voltag
13、e between VDD & VSS VDD 与 VSS 端工作电压 VDDop 1.5 - 10.0 V Operating voltage between CO & VM CO 与 VM 端工作电压 VVMop 1.5 - 25.0 V Minimum operating voltage for 0V charging 0V充电最小电池电压 Vst VDD-VM, VDD-VSS=0V - - 1.2 V Discharging overcurrent release resistance 过电流解除电阻 Rshort VDD=3.6,VM=1.0V 30 50 100 K CO pin
14、 Nch ON voltage CO Nch ON 电压 VCOL - 0.4 0.5 V CO pin Pch ON voltage CO Pch ON 电压 VCOH VDD-0.1 VDD-0.02 - V DO pin Nch ON voltage DO Nch ON 电压 VDOL - 0.2 0.5 V DO pin Pch ON voltage DO Pch ON 电压 VDOH VDD-0.1 VDD-0.02 - V Current consumption 正常操作消耗电流 IDD VDD=3.5V,VM=0V 1.2 2.4 6.0 uA Overdischarge cur
15、rent consumption (Self-recovery) 过放消耗电流 IDOX VDD=2.0V 1,8 3.0 uA DETECTION VOLTAGE 检测电压检测电压 Item 项目项目 Symbol 符号符号 Test Condition 测试条件测试条件 Min. 最小值最小值 Typ. 典型值典型值 Max. 最大值最大值 Unit 单位单位 Overcharge detection voltage 过充电检测电压 Vdet1 R1=100 4.250 4.300 4.350 V Overcharge release voltage 过充电解除电压 Vrel1 R1=10
16、0 4.050 4.100 4.150 V Overcharge hysteresis voltage 过充电滞后电压 Vhys1 R1=100 Vhys1=Vdet1-Vrel1 - 0.200 - V Overdischarge detection voltage 过放电检测电压 Vdet2 VM=0V,R1=100 2.300 2.400 2.500 V Overdischarge release voltage 过放电解除电压 Vrel R1=100 2.900 3.000 3.100 V Overdischarge release voltage2 过放电解除电压2 Vrel2 R1
17、=100, R2=1.0k, VM=Vchg 2.300 2.400 2.500 V Discharging overcurrent detection voltage 过放电电流检测电压 Vdet3 VDD=3.0V, R2=1.0k 0.110 0.140 0.170 V Short detection voltage 负载短路检测电压 Vshort VDD=3.0V 1.30 1.10 0.90 V Electrical Characteristics 电气参数电气参数 (无特殊标注时 TA = 25 unless otherwise specified) DELAY TIME 延迟时间
18、延迟时间 Item 项目项目 Symbol 符号符号 Test Condition 测试条件测试条件 Min. 最小值最小值 Typ. 典型值典型值 Max. 最大值最大值 Unit 单位单位 Overcharge detection delay time 过充电检测延迟时间 TVdet1 VDD=3.8V4.5V 35 80 150 ms Overcharge release delay time 过充电解除延迟时间 TVrel1 VDD=4.5V3.8V - 0.7 - ms Overdischarge detection delay time 过放电检测延迟时间 TVdet2 VDD=3
19、.2V2.2V 50 100 200 ms Overdischarge release delay time 过放电解除延迟时间 TVrel2 VDD=2.2V3.3V - 0.7 - ms Discharging overcurrent detection delay time 过放电电流检测延迟时间 TVdet3 VDD=3.0V, VM=0V0.2V 5 10 20 ms Discharging overcurrent release delay time 过放电电流解除延迟时间 TVrel3 VDD=3.0V, VM=0.2V0V - 0.7 - ms Short detection
20、delay time 负载短路检测延迟时间 Tshort VDD=3.5V, VM=0V1.0V 100 300 500 us Charger detection voltage 充电器检测电压 Vchg VDD=3.6V, R2=1.0k 0.3 0.7 1.1 V Pin Configuration and Package Marking Information 管脚描述管脚描述 Type Application Circuit 典型应用电路图典型应用电路图 Package 封装型式封装型式 Pin No. 管脚号管脚号 Symbol 符号符号 Description 管脚描述管脚描述 S
21、OT-23-6L 1 DO Over-discharge MOSFET Gate control terminal 放电控制用 MOSFET 栅极连接端子 2 VM Input terminal connect to charger and system ground 输入端连接到充电器和系统接地 3 CO Over-charge MOSFET Gate control terminal 充电控制用MOSFET栅极连接端子 4 NC No connection 空脚 5 VDD Battery positive terminal 正电源输入端子 6 VSS Battery negative t
22、erminal 负电源输入端子 Symbol 符号符号 Components 器件名称器件名称 Function 功能功能 Min. 最小值最小值 Typ. 典型值典型值 Max. 最大值最大值 Unit 单位单位 Remarks 备注备注 R1 Resistor 电阻器 Current limit noise filtering 限流与滤波稳压 100 1K *1 R2 Resistor 电阻器 Current limit ESD protection 限流与静电保护 300 1K 2K *4 R3 Thermistor 热敏电阻 Temp. protection 温度保护 k C1 Cap
23、acitor 电容器 Noise filtering 滤波稳压 0.022 0.1 1.0 F *3 M1 N-MOSFET Nch 场效应管 Discharge switch 放电控制开关 *2 M2 N-MOSFET Nch 场效应管 Charge switch 充电控制开关 *2 *1：R1 is a singlestage RC filter，the higher resistance of R1，the better the filtering effect，If the R1 resistance higher than the recommended value， it will
24、 affect the internal detection circuit and the voltage detection accuracy will out of specification. We suggest using the recommended resistance in application. R1电阻主要提供一个单极的RC滤波器，R1的电阻愈高，滤波稳压的效果愈佳，若选择太高的R1，将影响内部分压电阻的阻 抗，进而会影响过充电压与过放电压判断之精度，建议选择建议的电阻值。 *2：The absolute maximum rating of CO and VM is
25、28V, customer could choose 20V or 30V dual NMOSFET switches for different application. 保护IC的耐压为28V，可选择业界常用的20V或是30V耐压的双N沟道MOS管。 *3：Add a C1 capacitor between VDD and VSS could filter conduction and radiation noise. 在VDD与VSS端间加一个C1电容，可滤除外界的传导与辐射噪声。 *4：R2 resistor could have a current limit function a
26、nd limit charger current surge. 在 R2 处加一个电阻可以限制充电器瞬间的电流脉冲。 Normal Operation 功能说明功能说明 The DW01A monitors the VDD power supply voltage relative to VSS detecting the over- charge and over-discharge conditions. It also monitors the VM voltage to detect the discharge over-current and load short circuitin
27、g to protect the battery cell. In normal operation, the VDD should be in the range from the over-charge detection voltage Vdet1 to the over-discharge voltage Vdet2, and the VM pin voltage is in the range from discharge over-current voltage Vdet3 to charger detection voltage VCHA. In normal condition
28、, the internal pull-up resistor（RVMD）from VM pin to VDD is disconnected and the internal pull- down resistor（RVMS）from VM pin to VSS is also disconnected. DW01A可检测VDD到VSS的过充电压和过放电压情形。还可以监测VM的电压，并检测放电过电流 和负载短路保护电池单元。在正常操作中，VDD应该在过充电检测电压Vdet1的到过放电电压Vdet2的 范围内，并且VM电压的范围是从放电过电流电压Vdet3到充电器检测电压VCHA。在正常情况下
29、，从 VM到VDD内部上拉电阻（RVMD），或从VM和VSS内部下拉电阻（RVMS）则也会关断。 Notice : Discharging may not be enacted when the battery is first time connected. To regain normal status, VM and VSS terminal must be shorted or the charger must be connected. 附记附记 : 当第一次连接电池的时候，有时不能进行放电。要恢复正常状态，将当第一次连接电池的时候，有时不能进行放电。要恢复正常状态，将VM和和VSS
30、端子短路或 将充电器连接上去即可恢复正常。 端子短路或 将充电器连接上去即可恢复正常。 Over-Charge Condition 过充电保护状态过充电保护状态 When the battery voltage is greater than over-charge voltage（Vdet1）and have a TVdet1 time duration from a normal operation condition, the over-charge condition hold and the CO pin will output from logic “H” to logic “L”
31、 to disconnect the battery charging path. It will turn-off the external MOSFET and the charging status stopped. 当正常操作条件下，电池电压高于过充电电压（Vdet1），延迟时间超过TVdet1，及过充电状态保 持时，当CO端子电位从“H”到“L” ，则会断开电池充电路径。这将关断外部MOSFET开关和终止充电。 It will release the over-charge condition in the following conditions. If the battery v
32、oltage less than Vrel1 from the over-charge condition, the CO will output logic “H” to turn on the external MOSFET to resume the charging path. In the over-charge condition, the discharge over-current and load short circuiting function will be disabled until the battery voltage falls below the overc
33、harge detection voltage. It is because that the internal resistance of battery which will trigger the discharge over- current and load short circuiting function in the time when over-charge condition enabled. 在以下的条件，会停止过充电情况。如果在过充电情况下电池电压小于Vrel1，CO将输出为“H”，将 打开外部MOSFET恢复充电路径。在过充电状态，放电过电流保护和负载短路保护的功能将
34、启动，直 到电池电压低于过充电检测电压才会恢复。这是由于当有过充电情况时，电池的内部电阻将会触发放电 过电流保护和负载短路保护功能。 In over-charge condition, the internal pull-up resistor（RVMD）from VM pin to VDDis disconnected and the internal pull-down resistor（RVMS）from VM pin to VSS is also disconnected. 在过充电情况下，内部上拉电阻（RVMD）从VM到VDD断开，及内部下拉电阻（RVMS）从VM到 VSS也断开。
35、Over-Discharge Condition 过放电保护状态过放电保护状态 The DW01A single-cell lithium protect IC monitors the VDD voltage to detect the over- discharge state from normal operation condition. If the VDD voltage becomes lower than the Vdet2 and continues for the over-discharge delay time TVdet2 from normal operation
36、condition, the DO pin will output “L” to disable the external MOSFET and the discharging stopped. DW01A单节锂电池保护IC，在正常运行状态检测过放电保护状态。如果VDD电压低于Vdet2电压 下，DO端子电位为“L”，过放电延迟时间超过TVdet2，则关断外部MOSFET及停止放电。 If a charger is connected and the VDD voltage is greater than over-discharge release voltage Vrel2, the ov
37、er-discharge condition released. In over-discharge condition, the charging path is connected by the parasitic diode of discharge controlled MOSFET. 如果连接充电器后VDD电压大于过放电解除电压Vrel2，则为过放电解除状态。在过放电状态下，充 电路径连接是经由放电控制MOSFET的寄生二极管。 When a battery in the over-discharge condition, if VDD is greater than Vrel2 a
38、nd the VM is higher than VCHA, the over-discharge condition is released. When a battery in the over- discharge condition, if VDD is greater than Vdet2 and the VM is lower than VCHA, the over- discharge condition is released. 当电池处于过放电的状态，当VDD大于Vrel2及VM电压高于VCHA，过放电状态将解除。当VDD大于 Vdet2及VM电压低于VCHA，过放电状态将解
39、除。 When the over-discharge condition hold, and the voltage difference between VM and VDD is less than 1.3V, the current consumption is reduced to the power-down current consumption 0.1uA in typical. 当过放电保护时，并且VM和VDD之间的电压差小于1.3V，Power-down消耗电流会降低到典型值 0.1uA。 In over-discharge condition, the VM pin is
40、connected to VDD by internal pull-up resistor (RVMD) and the internal pull-down resistor（RVMS）from VM pin to VSS is disconnected. 在过放电保护时，VM端子连接到VDD，通过内部上拉电阻(RVMD)和内部下拉电阻（RVMS）从VM端 子与VSS断开。 When the MOSFET is off, VM pin voltage is pulled up by the resistor to VDD in the IC, at this time, the power
41、consumption is reduced to the lowest. This condition is called the “Green MODE”. 当MOSFET关断时，电阻器到VDD会拉升VM端子的电压，在这段时间内，功耗减小到最低。这种 情况被称为“绿色模式”。 Over-current Condition 过电流保护过电流保护 There are 3 kinds of over-current condition. One is the discharge over-current condition and another is the load short-circui
42、ting condition and the other is charge over-current condition. 过电流有3种情况 : 一种是放电过电流情况，一种是在负载短路情况，而另一种是充电过电流情 况。 The DW01A monitors the VM pin voltage to detect the over-current and load short- circuiting condition. If VM pin voltage is greater than Vdet3 and continues to discharge over- current delay
43、 time TVdet3, the over-current condition enabled and the DO pin output logic “L” to disable the discharging path. At the same time, the discharging is stopped. DW01A监控VM的电压，来检测过电流和负载短路状态。如果VM电压大于Vdet3，并超过放电过流 延迟时间TVdet3，则启动过电流保护，DO输出电位为“L”关闭放电回路。同时停止放电。 In over-current condition, the internal pull-u
44、p resistor from VM pin to VDD（RVMD）is disconnected and the VM pin is connected to VSS by internal pull-down resistor (RVMS). However, the VM pin is pull-up to VDD by external load resistor. When the load is disconnected, the VM pin is pull-down to VSS by internal resistor. 在过电流状态下，VM到VDD内部上拉电阻（RVMD）
45、，及VM到VSS通过内部下拉电阻(RVMS)断 开。然而，通过外部负载电阻VM上拉至VDD。当负载断开，通过内部电阻VM下拉到VSS。 If the VM pin voltage falls below the charger detection voltage VCHA under normal condition, and it continues and longer than the overcharge detection delay time TVdet1, the CO pin will disable the charging path by disconnected the charge controlled MOSFET. The charge over-current detection is released when the voltage difference between VM pin and VSS becomes less than charger detection voltage VCHA. 如果在正常情况下，VM电压低于充电器检测电压VCHA，并且时间超过过充电检测延迟时间 TVdet1，CO将断开控制MOSFET停止充电。当VM和VSS之间的电压差，小于充电器检测电压VCHA， 充电过流检测被解除。 Timing Diagram