S-8264AAA-I8T1U Datasheet, PDF (22/36 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 2-SERIAL

BATTERY PROTECTION IC FOR 2-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION)
S-8264A/B/C Series
Rev.4.2_02
(3) 2-serial cell
SC PROTECTOR
BAT1
BAT2
R_VDD
C_VDD
R1
C1
R2
C2
VDD
SENSE
VC1
S-8264A/B/C
Series
VC2
VC3
CO
EB+
FET
D_P
External
input^*1
R_CTL
VSS
CTL
EB−
Figure 15
*1. Refer to Table 13 for setting on external input.
Table 16 Constants for External Components
No.
Part
Min.
Typ.
Max.
Unit
1
R1 and R2
0.1
1
10
kΩ
2
C1 and C2, C_VDD
0.01
0.1
1
μF
3
R_VDD
50
100
500
Ω
4
R_CTL
0
100
500
Ω
Caution 1. The above constants are subject to change without prior notice.
2. It has not been confirmed whether the operation is normal or not in circuits other than the above
example of connection. In addition, the example of connection shown above and the constant
will not guarantee successful operation. Perform thorough evaluation using the actual
application to set the constant.
3. Set the same constants to R1 to R3 and to C1 to C3 and C_VDD.
4. Set R_VDD, C1 to C3, and C_VDD so that the condition (R_VDD) × (C1 to C3, C_VDD) ≥ 5 × 10^−6 is satisfied.
5. Set R1 to R3, C1 to C3, and C_VDD so that the condition (R1 to R3) × (C1 to C3, C_VDD) ≥ 1 × 10^−4 is
satisfied.
6. Since “H” may be output at CO transiently when the battery is being connected, connect the
positive terminal of BAT1 last in order to prevent the three terminal protection fuse from cutoff.
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