S-8233B Datasheet, PDF (2/26 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC (FOR A 3-SERIAL-CELL PACK)

BATTERY PROTECTION IC FOR 3-SERIAL-CELL PACK
S-8233B Series
„ Block Diagram
Rev.4.2_00
VCC
CD1
Reference
voltage 1
+
−
Battery 1
Over charge
+
−
Battery 1
Over discharge
Over current
2,3 delay circuit
Over current
detection
VMP
c ircuit
Over current1,
delay circuit
COVT
VC1
Battery 1
Over discharge
delay circuit
CDT
Over charge
+
Control
Logic
−
Battery 2
Over charge
CD2
+
Over charge
delay circuit
CCT
−
Battery 2
Over discharge
Reference
voltage 2
VC2
Battery 2
Over charge
DOP
+
−
Battery 3
Over charge
CD3
+
COP
−
Battery 3
Over discharge
Reference
voltage 3
VSS
Battery 3
Over charge
Floating
CTL
detection circuit
Figure 1
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.