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| S-8243A Datasheet, PDF (19/34 Pages) Seiko Instruments Inc – BATTRY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK | |||
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Rev.2.4_00
BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK
S-8243A/B Series
 Timing Charts
1. Overcharge detection, Over discharge detection
VCUn
VCLn
Battery voltage
VDUn
VDLn
(n= 1~4)
VDD
DOP pin voltage
VSS
VDD
COP pin voltage
Hi-Z
Hi-Z
VSS
VMP pin voltage
VDD
VIOV1
VSS
VBATOUT pin
voltage*1
VOUT
VBAT
VSS
VREG pin votage
VDD
VOUT
VSS
Charger connected
Load connected
Mode*2
Overcharge detection
delay time (tCU)
Overdischarge detection
delay time (tDL)
<1>
<2>
<1>
<3>
<1>
*1. State depends on CTL3 and CTL4 input levels. Refer to Figure 9.
*2. <1>: Normal mode, <2>: Overcharge mode, <3>: Overdischarge mode
Remark The charger is assumed to charge with a constant current. VEB+ indicates the open voltage of the
charger.
Figure 6
Seiko Instruments Inc.
19
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