S-8243AACFT-TB-X Datasheet, PDF (20/35 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC

BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK
S-8243A/B Series
Rev.3.1_00
2. Overcurrent detection
V_CU
V_HC
Battery
V_CL
voltage
V_DU
V_DL
V_HD
DOP pin
voltage
COP pin
voltage
VMP pin
voltage
V_DD
V_SS
V_EB+
V_SS
V_DD
V_IOV1
V_IOV2
V_IOV3
V_SS
V_RETURN^*1
High-Z
High-Z
High-Z
V_OUT
VBATOUT ^VBAT
pin voltage^*2
V_SS
V_DD
VREG pin
voltage
V_OUT
V_SS
Charger connected
Load connected
Status^*3
Overcurrent detection
delay time 1 ( t_IOV1)
<1>
<2>
Overcurrent detection
delay time 2 ( t_IOV2)
<1>
<2>
Overcurrent detection
delay time 3 ( t_IOV3)
<1> <2>
<1>
*1. V_RETURN = V_DD / 6 (typ.)
*2. State depends on CTL3 and CTL4 input levels. Refer to Figure 9.
*3. <1>: Normal status, <2>: Overcurrent status
Remark The charger is assumed to charge with a constant current. V_EB+ indicates the open voltage of the charger.
Figure 7
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