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BQ77908DBTR PDF预览

BQ77908DBTR

更新时间： 2024-02-20 23:41:37
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德州仪器 - TI 电源电路电源管理电路光电二极管
页数 文件大小 规格书
56页 870K
描述
Stand-Alone Multi-Cell Lithium-Ion/Polymer Precision Protectors

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中文翻译

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BQ77908DBTR 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Obsolete零件包装代码：TSSOP
包装说明：TSSOP-38针数：38
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.79
Is Samacsys：N可调阈值：YES
模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUITJESD-30 代码：R-PDSO-G38
长度：9.7 mm信道数量：1
功能数量：1端子数量：38
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：TSSOP
封装等效代码：TSSOP38,.25,20封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：NOT SPECIFIED
电源：5.6/35 V认证状态：Not Qualified
座面最大高度：1.2 mm子类别：Power Management Circuits
最大供电电流 (Isup)：0.075 mA最大供电电压 (Vsup)：35 V
最小供电电压 (Vsup)：5.6 V标称供电电压 (Vsup)：6.4 V
表面贴装：YES温度等级：INDUSTRIAL
端子形式：GULL WING端子节距：0.5 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：4.4 mmBase Number Matches：1

BQ77908DBTR 数据手册

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bq77908  
www.ti.com  
SLUSAI5D –APRIL 2011–REVISED NOVEMBER 2011  
Stand-Alone Multi-Cell Lithium-Ion/Polymer Precision Protectors  
Check for Samples: bq77908  
1
FEATURES  
Automatic cell balancing is provided using internal  
50-mA cell circuits. A robust balancing algorithm  
ensures optimum performance by maintaining all cell  
voltages in balance. Balancing may be configured to  
operate at all times, only during charge, or can be  
disabled completely.  
•
•
•
4-, 5-, 6-, 7-, or 8 Series Cell Protection  
Individual Cell-Voltage Monitoring  
Low-Side NMOS FET Drive for Charge and  
Discharge Control  
•
•
•
•
Compatible With 1-mΩ Current-Sense Resistor  
Supply-Voltage Range From 5.6 V to 40 V  
Integrated 3.3-V Micro-Power LDO Regulator  
Low Supply Current  
Additional advanced safety features of the bq77908  
include the ability to control split power-path  
MOSFETs, an open-cell sense-line detection  
mechanism, and the ability to detect an open or  
shorted external temperature sensor.  
–
–
Normal Mode: 50 µA, Typical  
Shutdown Mode, LDO OFF: 5 µA, Typical  
Programmable Protection Functions  
•
•
38-Pin TSSOP Package  
•
Wide range of programmable detection thresholds  
and delay times  
Internal 50-mA Automatic Cell Balancing  
•
Configurable for multiple cell types and application  
requirements:  
APPLICATIONS  
–
–
–
–
–
Cell overvoltage  
Cell undervoltage  
Pack discharge overcurrent  
Pack discharge short circuit  
Pack charge short-circuit current  
•
•
•
•
•
•
Cordless Power Tools  
Cordless Lawn Equipment  
Electric Bikes  
UPS  
Medical Equipment  
Light Electric Vehicles (LEV)  
•
Variable gain (×1 or ×5) current-sense circuit  
–
Compatible with a wide range of current-sense  
resistors (1 mΩ to 5 mΩ typical) sized for  
application requirements  
DESCRIPTION  
The bq77908 precision protector is a complete  
stand-alone, self-contained battery-protection and  
cell-balancing device intended for Li-ion/polymer  
battery packs.  
Fixed Hardware Protection Functions  
•
•
•
•
Preset overtemperature protections  
Open-cell detection  
Open and shorted thermistor detection  
Brownout protection quickly shuts off FETs under  
low-battery conditions to avoid FET overheating  
The bq77908 monitors 4 to 8 series individual cell  
voltages and provides fast-acting outputs which may  
be used to drive N-channel MOSFETs to interrupt the  
power path. Activation delays and recovery methods  
for each safety condition are fully programmable in  
non-volatile memory.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2011, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
 
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BQ77908DBTR 替代型号

型号 品牌 替代类型 描述 数据表
BQ77908DBT TI

完全替代

 Stand-Alone Multi-Cell Lithium-Ion/Polymer Precision Protectors
BQ77908ADBTR TI

完全替代

 Multi-Cell Lithium-Ion/Polymer Precision Protector
ISL94208IRZ RENESAS

功能相似

 4- to 6-Cell Li-ion Battery Management Analog Front-End; QFN32; Temp Range: -40° t

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