BATTERY PROTECTION IC FOR 1-CELL PACK
S-8241 Series
Rev.7.6_00
(3) Overcurrent detection
VCU
V
CL
Battery
voltage
V
V
DL
DU
VDD
DO pin
CO pin
V
SS
VDD
V
SS
VDD
V
SHORT
IOV2
IOV1
VM pin
V
V
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)
(1)
(1)
(4)
(4)
(1)
(4)
Note: (1) Normal mode, (2) Overcharge mode, (3) Overdischarge mode, (4) Overcurrent mode
The charger is assumed to charge with constant current.
Figure 9
(4) Charger detection
VCU
VCL
Battery
voltage
VDU
VDL
VDD
DO pin
CO pin
VSS
VDD
VSS
VDD
VM pin
VSS
VCHA
Charger connection
Load connection
If VM pin voltage
Overdischarge is released at
V
CHA
<
overdischarge detection voltage (VDL
)
Overdischarge detection delay time (tDL
)
Mode
(1)
(1)
(3)
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.
SII [ SEIKO INSTRUMENTS INC ]
