S-8233B Datasheet, PDF (16/26 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC (FOR A 3-SERIAL-CELL PACK)

BATTERY PROTECTION IC FOR 3-SERIAL-CELL PACK
S-8233B Series
„ Timing Charts
1. Over charge detection
V_CU
Battery
volta ge
VCD
VDU
VDD
VCC
DOP
terminal
VSS
V1 battery
V2 battery
V3 battery
COP
terminal
VMP
terminal
V_SS
V CHA
VCC
V IOV1
V_SS
C harg er
conne cted
Load
connected
Mode^*1
Hi -z
Delay
c
d
Hi-z
Hi-z
Delay
c
d
De lay
c
Delay
c
*1. cNormal mode, dOver charge mode, eOver discharge mode, fOver current mode
Remark The charger is assumed to charge with a constant current. VCHA indicates the open voltage of the charger.
Figure 6
2. Over discharge detection
Rev.4.2_00
Hi-z
Delay
e d&e e
V_CU
Battery VCD
voltage VDU
V_DD
VCC
DOP
termina l
V_SS
V1 battery
V2 battery
V3 battery
CO P
terminal
Hi-z
V_SS
VMP
terminal
V_CHA
VCC
VIOV1
V_SS
Charger
connected
Load
connected
De lay
Delay
Delay
De lay
Delay
Mode^*1
c
e
c
e
c
e
c dc
e
c
*1. cNormal mode, dOver charge mode, eOver discharge mode, fOver current mode
Remark The charger is assumed to charge with a constant current. V_CHA indicates the open voltage of the charger.
Figure 7
16
Seiko Instruments Inc.