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| S-8243A Datasheet, PDF (20/34 Pages) Seiko Instruments Inc – BATTRY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK | |||
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BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK
S-8243A/B Series
2. Overcurrent detection
VCU
VHC
Battery
VCL
voltage
VDU
VDL
VHD
VDD
DOP pin
voltage
VSS
Rev.2.4_00
COP pin
Hi-Z
voltage
VSS
VMP pin
voltage
VDD
VIOV1
VIOV2
VIOV3
VSS
VRETURN*1
Hi-Z
Hi-Z
VOUT
VBATOUT VBAT
pin voltage *2
VSS
VDD
VREG pin
voltage
VOUT
VSS
Charger connected
Load connected
Overcurrent detection
delay time 1 ( tIOV1)
Overcurrent detection
delay time 2 ( tIOV2)
Overcurrent detection
delay time 3 ( tIOV3)
Mode*3
<1>
<2>
<1>
<2>
<1> <2> <1>
*1. VRETURN = VDD / 6 (typ.)
*2. State depends on CTL3 and CTL4 input levels. Refer to Figure 9.
*3. <1>: Normal mode, <2>: Overcurrent mode
Remark The charger is assumed to charge with a constant current. VEB+ indicates the open voltage of the
charger.
Figure 7
20
Seiko Instruments Inc.
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