s-8264a Seiko Instruments Inc., s-8264a Datasheet - Page 18

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

18
BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION)
S-8264A/B Series
Cautions 1. The above constants are subject to change without prior notice.
(2) 3-serial cell
No.
BAT1
BAT2
BAT3
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 R3 and to C1 to C3 and CVDD.
4. Set RVDD, C1 to C3, and CVDD so that the condition (RVDD) × (C1 to C3, CVDD) ≥ 5 × 10−6 is
5. Set R1 to R3, C1 to C3, and CVDD so that the condition (R1 to R3) × (C1 to C3, CVDD) ≥ 1 × 10−4
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.
is 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.
External
input
R
R1
R2
R3
C1 to C3, C
VDD
R1 to R3
R
R
Part
VDD
CTL
R
C3
C
C1
C2
CTL
VDD
VDD
Table 11 Constants for External Components
VDD
SENSE
VC1
VC2
VC3
VSS
CTL
Seiko Instruments Inc.
Min.
0.01
0.1
50
0
S-8264A/B
Series
Figure 13
CO
Perform thorough evaluation using the actual
Typ.
100
100
0.1
1
SC PROTECTOR
Max.
500
500
10
1
FET
D
P
Rev.2.0
Unit
kΩ
µF
Ω
Ω
EB+
EB−
_00