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BQ24202

更新时间： 2024-11-08 22:50:19
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
14页 205K
描述
SINGLE CHIP U-I ONAND LI-POL CHARGE MANAGEMENT IC FOR CURRENT LIMITED APPLICATIONS

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BQ24202 数据手册

 浏览型号BQ24202的Datasheet PDF文件第2页浏览型号BQ24202的Datasheet PDF文件第3页浏览型号BQ24202的Datasheet PDF文件第4页浏览型号BQ24202的Datasheet PDF文件第5页浏览型号BQ24202的Datasheet PDF文件第6页浏览型号BQ24202的Datasheet PDF文件第7页 
ꢀ ꢁꢂ ꢃ ꢂ ꢄ ꢄ ꢅ ꢀ ꢁꢂ ꢃ ꢂ ꢄ ꢆ ꢅ ꢀꢁ ꢂꢃ ꢂꢄ ꢂ  
ꢀ ꢁꢂ ꢃ ꢂ ꢄ ꢇ ꢅ ꢀ ꢁꢂ ꢃ ꢂ ꢄ ꢃ ꢅ ꢀꢁ ꢂꢃ ꢂꢄ ꢈ  
SLUS501A – OCTOBER 2001  
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FEATURES  
DESCRIPTION  
D
D
Designed Specifically to Work With  
Current-Limited Wall Supplies  
The bq2420x series are simple Li-Ion linear  
charge management devices targeted at low-cost  
and space limited charger applications. The  
bq2420x series offer integrated powerFET,  
high-accuracy voltage regulation, temperature  
monitoring, charge status, and charge  
termination, in a single monolithic device.  
Ideal for Low Dropout Charger Design for  
Single-Cell Li-Ion Packs With Coke or  
Graphite Anodes  
D
D
Integrated PowerFET for 500 mA  
Integrated Voltage Regulation With 0.5%  
Accuracy  
The bq2420x is designed to work with a  
current-limited wall-mount transformer and  
therefore does not provide any current regulation.  
However, these devices offer a fixed internal  
current limit to prevent damage to the internal  
powerFET. A time-limited pre-conditioning phase  
is provided to condition deeply discharged cells.  
Once the battery reaches the charge voltage, the  
high accuracy voltage regulation loop takes over  
and completes the charge cycle. Charge is  
terminated based on minimum current. An internal  
charge timer provides a backup safety for charge  
termination.  
D
Battery Insertion and Removal Detection  
D
Charge Termination by Minimum Current and  
Time  
D
D
D
Pre-Charge Conditioning With Safety Timer  
Sleep Mode for Low-Power Consumption  
Charge Status Output for LED or Host  
Processor Interface Indicates  
Charge-in-Progress, Charge Completion, and  
Fault Conditions  
D
D
Optional Temperature Monitoring Before and  
During Charge  
Other standard features include an automatic  
Small, 8-Pin Power-Pad MSOP Package  
sleep mode activated when V  
battery voltage and a recharge feature activated  
falls below the  
CC  
when the battery voltage falls below the V  
threshold.  
RCH  
TYPICAL APPLICATION  
bq24202DGN  
DC+  
In addition to the standard features, the core  
product provides two additional enhancements:  
temperature monitoring and status display. The  
temperature-sense circuit continuously measures  
battery temperature using an external thermistor  
and inhibits charge until the battery temperature is  
within the user–defined thresholds. The STAT pin  
indicates three conditions of operation of the  
charger. These conditions are charge-  
in-progress, charge complete, and fault. This  
output can be used to drive an LED or an interface  
to a microcontroller.  
1
2
3
4
IN  
OUT  
8
7
6
5
C1  
C1  
VCC BAT  
+
STAT  
VSS  
CE  
DC–  
R1  
N/C  
BATTERY PACK  
UDG–01111  
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Copyright 2001, Texas Instruments Incorporated  
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BQ24202 替代型号

型号 品牌 替代类型 描述 数据表
BQ24203 TI

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