S-8233C_1 Datasheet, PDF (2/27 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 3-SERIAL-CELL PACK

BATTERY PROTECTION IC FOR 3-SERIAL-CELL PACK
S-8233C Series
Block Diagram
Rev.4.1_00
VCC
CSO
Over
charge
VC1
ISO
Over
c urrent
VC2
Reference
voltage 1
+
-
Battery 1
Over charge
+
-
Battery 1
Over discharge
+
-
Battery 2
Over charge
+
Control
Logic
-
Battery 2
Over discharge
Reference
voltage 2
Over current
2,3 delay circuit
Over current
detection
c ircuit
Over current1‚
delay circuit
Over discharge
delay circuit
Over charge
delay circuit
VMP
COVT
CDT
CCT
DOP
DSO
Over
discharge
VSS
+
-
Battery 3
Over charge
+
-
Battery 3
Over discharge
Reference
voltage 3
COP
Floating
CTL
detection circuit
Figure 1
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.
In the overcharge condition, the CSO pin outputs “H”.
In the overdischarge condition, the DSO pin outputs “H”.
In the overcurrent condition, the ISO pin outputs “H”.
In normal condition, the above CSO, DSO, and ISO pins output “L”.
The outputs are CMOS outputs.
2
Seiko Instruments Inc.