STBC21 Datasheet, PDF (24/54 Pages) STMicroelectronics – LI+ battery charger with thermal regulation

Detailed description
Figure 13. Battery alarm flowchart
BaƩery alarm detecƟon
TIMER-4
YES
expired
NO
NO
TIMER-1
YES
expired
NO
BaƩery
YES
ConnecƟon DetecƟon
error
NO
UVLO on VBAT
YES
VBAT < 3.0V
NO
NO
OVP on VBAT
YES
VBA T > 4.25V
NO
YES
BaƩery hot
VTEMP < 0.3V
NO
YES
VBAT < 1.0V
Fast-Charge
YES
or
End of Charge
Figure 14. Charger alarm flowchart
Charger alarm detecƟon
STBC21
Charging Stop
BaƩery Alarm
LED SET
NO
BaƩery removal
YES
BaƩery unistallaƟon
LED SET
END
AM10422v 1
24/54
OVP on VCC
YES
VCC > 9.0V
NO
UVLO on VCC
YES
VCC < 2.8V
NO
YES
Power UP
NO
2.8V TransiƟon
Over Current ^YES
IBAT > 1.1A
NO
Doc ID 023256 Rev 1
Charging Stop
Charger Alarm
LED SET
NO
POWER OFF
YES
END
AM10423v 1