S-8232 Datasheet, PDF (2/27 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK

BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK
S-8232 Series
„ Block Diagram
Rev.5.4_00
VCC
SENS
Reference
voltage 1
−
+
Auxiliary
overcharge
detector 1
Overcharge
− ^{detector 1}
+ _Over-
discharge
DO
Delay circuit
− ^{detector 1}
control signal
+
Control
logic
VC
VSS
Over-
discharge
+ ^{detector 2}
−
Overcharge
detector 2
+
−
Delay circuit control signal
Over current
detection circuit
Delay circuit
+
−
Auxiliary
Reference
voltage 2
overcharge
detector 2
Delay circuit
control signal
control signal
Delay circuit
DO, CO control signal
CO
RCOL
VM
ICT
Remark Resistor (RCOL) is connected to the Nch transistor although CO pin serves as a CMOS output.
For this, impedance becomes high when outputting “L” from CO pin. Refer to the “„ Electrical
Characteristics” for the impedance value.
Figure 1
2
Seiko Instruments Inc.