s-8264a Seiko Instruments Inc., s-8264a Datasheet - Page 17

• Manufacturer Part Number: s-8264a
• Description: Battery Protection Ic For 2-serial To 4-serial-cell Pack Secondary Protection
• Manufacturer: Seiko Instruments Inc.

Rev.2.0
Battery Protection IC Connection Example
Cautions 1. The above constants are subject to change without prior notice.
(1) 4-serial cell
_00
No.
BAT1
BAT2
BAT3
BAT4
1
2
3
4
2. It has not been confirmed whether the operation is normal or not in circuits other than the above
3. Set the same constants to R1 to R4 and to C1 to C4 and C
4. Set R
5. Set R1 to R4, C1 to C4, and C
6. In the S-8264A Series, normally input “H” to the external input, and input “L” when setting CO to
7. Since “H” may be output at CO transiently when the battery is being connected, connect the
example of connection. In addition, the example of connection shown above and the constant
will not guarantee successful operation.
application to set the constant.
satisfied.
“H”. In the S-8264B Series, normally input “L” to the external input, and input “H” when
releasing the latch that maintains CO at “H” after overcharge detection.
positive terminal of BAT1 last in order to prevent the three terminal protection fuse from cutoff.
BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION)
External
VDD
R1
R2
R3
R4
R
C1 to C4, C
input
VDD
, C1 to C4, and C
R1 to R4
R
R
Part
VDD
CTL
C3
C4
C
C1
C2
R
VDD
VDD
Table 10 Constants for External Components
CTL
VDD
VDD
SENSE
VC1
VC2
VC3
VSS
CTL
Seiko Instruments Inc.
so that the condition (R
Min.
0.01
VDD
0.1
50
0
S-8264A/B
so that the condition (R1 to R4) × (C1 to C4, C
Series
Figure 12
CO
Perform thorough evaluation using the actual
Typ.
100
100
0.1
1
VDD
) × (C1 to C4, C
VDD
SC PROTECTOR
.
Max.
500
500
10
1
FET
VDD
D
) ≥ 5 × 10
S-8264A/B Series
P
VDD
− 6
) ≥ 1 × 10
is satisfied.
Unit
kΩ
µF
Ω
Ω
EB+
EB−
− 4
is
17