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STBC21 数据表(PDF) 20 Page - STMicroelectronics

部件名 STBC21
功能描述  LI battery charger with thermal regulation
PDF  54 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STBC21 数据表(HTML) 20 Page - STMicroelectronics

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Detailed description
STBC21
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Doc ID 023256 Rev 1
Figure 9.
Battery temperature alarm during charge flowchart
The chip also includes an NVM to allow the temperature thresholds above to be
programmable few times by the battery manufacturer.
The temperature thresholds are sensed by the NTC inside the battery pack. A reference
voltage is properly partitioned to translate the variable resistance in a variable voltage as
shown in
Figure 10.
Figure 10.
Temperature detector schematic
AM10420v 1
Ba ery Temperature
Alarm Detecon /
During charge
Baery Temperature >
60°C
Baery Temperature < -
2°C
Charge
Baery Temperature
Alarm occurrence
Stop charging
Timers keep coun ng
Alarm asserons =2 mes
Charge on going
LED SET
Ba ery
removed
YES
YES
YES
YES
NO
0°C < Baery Temperature < 43°C
NO
NO
NO
NO
Charging Comple on
LED SET
Ba ery Unistalla on
LED SET
YES
Restart charging from the
interrupted point
END
Baery Temperature
> 60°C
YES
NO
Increase
alarm counter
Charge on going
LED SET
Ba ery Temp Alarm /
During charge
LED SET
AM10421v 1
STBC21
TEMP
+
_
RPART2
RPART1
R1
NTC
VREF
BATTERY PACK
R2
R3



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