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BQ24725ARGRR

更新时间： 2024-02-23 23:50:54
品牌 Logo 应用领域
德州仪器 - TI 电池电路保护控制器
页数 文件大小 规格书
42页 1491K
描述
1-4 Cell Li Battery SMBus Charge Controller with N-Channel Power MOSFET Selector and Advanced Circuit Protection

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BQ24725ARGRR 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：QFN
包装说明：HVQCCN,针数：20
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：0.8
Is Samacsys：N可调阈值：NO
模拟集成电路 - 其他类型：POWER SUPPLY MANAGEMENT CIRCUITJESD-30 代码：S-PQCC-N20
JESD-609代码：e4长度：3.5 mm
湿度敏感等级：2信道数量：1
功能数量：1端子数量：20
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：HVQCCN
封装形状：SQUARE封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：1 mm最大供电电压 (Vsup)：24 V
最小供电电压 (Vsup)：4.5 V表面贴装：YES
温度等级：INDUSTRIAL端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：NO LEAD端子节距：0.5 mm
端子位置：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：3.5 mmBase Number Matches：1

BQ24725ARGRR 数据手册

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bq24725A  
www.ti.com  
SLUSAL0 –SEPTEMBER 2011  
1-4 Cell Li+ Battery SMBus Charge Controller with N-Channel Power MOSFET Selector  
and Advanced Circuit Protection  
Check for Samples: bq24725A  
1
FEATURES  
DESCRIPTION  
The bq24725A is a high-efficiency, synchronous  
battery charger, offering low component count for  
space-constraint, multi-chemistry battery charging  
applications.  
•
SMBus Host-Controlled NMOS-NMOS  
Synchronous Buck Converter with  
Programmable 615kHz, 750kHz, and 885kHz  
Switching Frequencies  
The bq24725A utilizes two charge pumps to  
separately drive n-channel MOSFETs (ACFET,  
RBFET and BATFET) for automatic system power  
source selection.  
•
•
•
Automatic N-channel MOSFET Selection of  
System Power Source from Adapter or Battery  
Driven by Internal Charge Pumps  
Enhanced Safety Features for Over Voltage  
Protection, Over Current Protection, Battery,  
Inductor and MOSFET Short Circuit Protection  
SMBus controlled input current, charge current, and  
charge voltage DACs allow for very high regulation  
accuracies that can be easily programmed by the  
system power management micro-controller.  
Programmable Input Current, Charge Voltage,  
Charge Current Limits  
The bq24725A uses internal input current register or  
external ILIM pin to throttle down PWM modulation to  
reduce the charge current.  
–
–
–
–
±0.5% Charge Voltage Accuracy up to 19.2V  
±3% Charge Current Accuracy up to 8.128A  
±3% Input Current Accuracy up to 8.064A  
The bq24725A charges one, two, three or four series  
Li+ cells, and is available in a 20-pin, 3.5x3.5 mm2  
QFN package.  
±2% 20x Adapter Current or Charge Current  
Amplifier Output Accuracy  
•
•
Programmable Battery Depletion Threshold,  
and Battery LEARN Function  
PIN CONFIGURATION  
Programmable Adapter Detection and  
Indicator  
20  
19  
18  
17  
16  
•
•
•
Integrated Soft Start  
1
2
3
4
5
15 LODRV  
14 GND  
ACN  
ACP  
Integrated Loop Compensation  
Real Time System Control on ILIM pin to Limit  
Charge Current  
CMSRC  
ACDRV  
ACOK  
13 SRP  
bq24725A  
•
•
•
AC Adapter Operating Range 4.5V-24V  
12 SRN  
5µA Off-State Battery Discharge Current  
11 BATDRV  
0.65mA (0.8mA max) Adapter Standby  
Quiescent Current  
20-pin 3.5 x 3.5 mm2 QFN Package  
6
7
8
9
10  
•
APPLICATIONS  
•
Portable Notebook Computers, UMPC,  
Ultra-Thin Notebook, and Netbook  
•
•
•
Handheld Terminal  
Industrial and Medical Equipment  
Portable Equipment  
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.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2011, Texas Instruments Incorporated  
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