S-8241 Datasheet, PDF (24/38 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 1-CELL PACK

BATTERY PROTECTION IC FOR 1-CELL PACK
S-8241 Series
Rev.7.6_00
(3) Overcurrent detection
VCU
VCL
Battery
voltage VDU
VDL
VDD
DO pin
VSS
VDD
CO pin
VSS
VM pin
VDD
VSHORT
VIOV2
VIOV1
VSS
Charger connection
Load connection
Overcurrent 1 detection delay time (tIOV1) Overcurrent 2 detection delay time (tIOV2) Load short-circuiting detection delay time (t ) SHORT
Mode
(1) (4)
(1)
(4)
(1)
(4)
(1)
Note: (1) Normal mode, (2) Overcharge mode, (3) Overdischarge mode, (4) Overcurrent mode
The charger is assumed to charge with constant current.
(4) Charger detection
V_CU
Battery ^VCL
voltage _VDU
V_DL
Figure 9
DO pin ^VDD
V_SS
CO pin ^VDD
V_SS
V_DD
VM pin
V_SS
V_CHA
Charger connection
Load connection
Mode
Overdischarge detection delay time (t_DL)
If VM pin voltage < V_CHA
Overdischarge is released at
overdischarge detection voltage (V_DL)
(1)
(3)
(1)
Note: (1) Normal mode, (2) Overcharge mode, (3) Overdischarge mode, (4) Overcurrent mode
The charger is assumed to charge with constant current.
Figure 10
24
Seiko Instruments Inc.