BATTERY PROTECTION IC FOR SINGLE-CELL PACK
S-8261 Series
Rev.1.9_00
3. Charger Detection
VCU
V
CU−VHC
Battery
voltage
V
DL+VHD
VDL
VDD
DO pin
CO pin
VSS
VDD
VSS
VDD
VM pin
VSS
VCHA
Charger connection
Load connection
In case VM pin voltage < VCHA
Overdischarge is released at the overdischarge
Overdischarge detection delay time (tDL
)
detection voltage (VDL
)
Mode
(1)
(1)
(3)
Remark (1) Normal condition, (2) Overcharge condition, (3) Overdischarge condition, (4) Overcurrent condition
The charger is supposed to charge with constant current.
Figure 9
4. Abnormal Charge Current Detection
VCU
V
CU−VHC
Battery
voltage
V
DL+VHD
VDL
VDD
DO pin
CO pin
VM pin
VSS
VDD
VSS
VDD
VSS
VCHA
Charger connection
Load connection
Abnormal charging current detection delay time
( = Overcharge detection delay time (tCU))
Overdischarge detection delay time (tDL
(1)
)
Mode
(3)
(1)
(2)
(1)
Remark (1) Normal condition, (2) Overcharge condition, (3) Overdischarge condition, (4) Overcurrent condition
The charger is supposed to charge with constant current.
Figure 10
Seiko Instruments Inc.
23
SII [ SEIKO INSTRUMENTS INC ]
