s-8243b Seiko Instruments Inc., s-8243b Datasheet - Page 20

• Manufacturer Part Number: s-8243b
• Description: Battry Protection Ic For 3-serial Or 4-serial Cell Pack
• Manufacturer: Seiko Instruments Inc.

20
BATTERY PROTECTION IC FOR 3-SERIAL OR 4-SERIAL CELL PACK
S-8243A/B Series
2. Overcurrent detection
*1. V
*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. V
Battery
voltage
DOP pin
voltage
COP pin
voltage
VMP pin
voltage
VBATOUT
pin voltage
VREG pin
voltage
Charger connected
Load connected
Mode
RETURN
*3
= V
*2
DD
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
EB
CU
CL
DU
DL
DD
SS
SS
DD
IOV1
IOV2
IOV3
SS
OUT
BAT
SS
DD
OUT
SS
/ 6 (typ.)
+
V
Overcurrent detection
RETURN
delay time 1 ( t
<1>
*1
V
V
HC
HD
IOV1
)
Seiko Instruments Inc.
High-Z
<2>
Figure 7
Overcurrent detection
delay time 2 ( t
<1>
EB
+ indicates the open voltage of the charger.
IOV2
High-Z
<2>
)
<1>
Overcurrent detection
delay time 3 ( t
High-Z
<2>
IOV3
)
Rev.2.5
<1>
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