S-8261 Datasheet, PDF (23/36 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR SINGLE-CELL PACK

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