BATTERY PROTECTION IC FOR 1-CELL PACK
S-8241 Series
Block Diagram
Rev.7.6
_00
Delay circuit
Clock generation circuit
VDD
DO
Load
short-circuiting
detection circuit
Counter circuit
−
+
Overcharge
detection
comparator
Level conversion circuit
0V battery charging circuit
0V battery charge
inhibition circuit
CO
R
COL
Overdischarge
detection
comparator
+
−
The overdischarge
hysterisis is released when
a charger is detected.
Charger
detection circuit
R
VMD
+
−
Overcurrent 1
detection comparator
R
VMS
VM
+
−
Overcurrent 2
detection comparator
VSS
Remark
The diodes in the IC are parasitic diodes.
Figure 1
2
Seiko Instruments Inc.