S-8233A Datasheet, PDF (17/30 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 3-SERIAL-CELL PACK

Rev.3.2_10
BATTERY PROTECTION IC FOR 3-SERIAL-CELL PACK
S-8233A Series
Timing Chart
1. Overcharge detection
VCU
Battery ^VCD
voltage ^VDU
VDD
VCC
DOP
terminal
VSS
V1 battery
COP
terminal
VMP
terminal
VSS
VCHA
VCC
VIOV1
VSS
Charger
connected
Load
connected
Mode^*1
Hi-z
Delay
V2 battery
V3 battery
Hi-z
Hi-z
Delay
Delay
Delay
*1. Normal mode, Over charge mode, Over discharge mode, Over current mode
Remark The charger is assumed to charge with a constant current. VCHA indicates the open voltage of the charger.
Hi-z
Delay
&
Figure 6
2. Overdischarge detection
VCU
Battery VCD
voltage VDU
VDD
V1 battery
VCC
DOP
terminal
VSS
COP
terminal
VMP
terminal
VSS
VCHA
VCC
VIOV1
VSS
Charger
connected
Load
connected
Mode^*1
Delay
Delay
V2 battery
V3 battery
Hi-z
Delay
Delay
Delay
*1. Normal mode, Over charge mode, Over discharge mode, Over current mode
Remark The charger is assumed to charge with a constant current. VCHA indicates the open voltage of the charger.
Figure 7
Seiko Instruments Inc.
17