s-8204a Seiko Instruments Inc., s-8204a Datasheet - Page 18

• Manufacturer Part Number: s-8204a
• Description: Battery Protection Ic For 3-series Or 4-series Cell Pack
• Manufacturer: Seiko Instruments Inc.

18
BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK
S-8204A Series
1. Overcharge Detection and Overdischarge Detection
Timing Chart
*1. < 1 > : Normal status
Remark The charger is assumed to charge with a constant current. V
VMP pin voltage 1/2×V
Battery voltage
DOP pin voltage
COP pin voltage
Charger connection
Load connection
Status
< 2 > : Overcharge status
< 3 > : Overdischarge status
charger.
*1
39/40×V
(n = 1 to 4)
V
V
V
V
V
V
V
V
V
V
CUn
CLn
DLn
DD
SS
EB+
SS
EB+
DD
DD
SS
DD
<1>
Overcharge detection
delay time (t
Seiko Instruments Inc.
High-Z
CU
<2>
)
Figure 9
Overdischarge detection
<1>
delay time (t
EB+
indicates the open voltage of the
DL
High-Z
)
<3>
Rev.1.3
<1>
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