S-8233A Datasheet, PDF (2/30 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 3-SERIAL-CELL PACK

BATTERY PROTECTION IC FOR 3-SERIAL-CELL PACK
S-8233A Series
Block Diagram
Rev.3.2_10
VCC
CD1
VC1
CD2
VC2
CD3
VSS
Reference
voltage 1
+
−
Battery 1
Over charge
+
−
Battery 1
Over discharge
Battery 1
Over charge
+
−
Battery 2
Over charge
+
Control
Logic
−
Battery 2
Over discharge
Reference
voltage 2
Battery 2
Over charge
+
−
Battery 3
Over charge
+
−
Battery 3
Over discharge
Reference
voltage 3
Battery 3
Over charge
Figure 1
Over current
2,3 delay
circuit
Over current
detection
circuit
Over current1,
delay circuit
Over discharge
delay circuit
Over charge
delay circuit
Floating
detection circuit
VMP
COVT
CDT
CCT
DOP
COP
CTL
Remark The delay time for over current detection 2 and 3 is fixed by an internal IC circuit. The delay time
cannot be changed via an external capacitor.
2
Seiko Instruments Inc.