S-8225BAA-TCT1U Datasheet, PDF (17/24 Pages) Seiko Instruments Inc – BATTERY MONITORING IC

Rev.1.5_01
BATTERY MONITORING IC FOR 3-SERIAL TO 5-SERIAL CELL PACK
S-8225B Series
3. 3-serial cell
EB+
CTLD
R_CTLD
1 CTLD
VDD 16
RVDD
CTLC
RCTLC
2 CTLC
VC1 15
C_VDS
CVDD
RVC1
3 CO
VC2 14
CVC1
RVC2
4 DO
VC3 13
C_VC2
RVC3
OD
R_SEL1
S-8225B
5 SEL1
VC4 12
CVC3
RVC4
OC
RSEL2
6 SEL2
VC5 11
CVC4
CCDT
7 CDT
8 CCT
VC6 10
VSS 9
CCCT
EB−
Figure 16
Remark Regarding the recommended values for external components, refer to "Table 9 Constants for External
Components".
Table 9 Constants for External Components
Symbol
RVDD
RVCn
CVDS
CVDD
CVCn
CCCT
CCDT
RCTLC, RCTLD
RSEL1, RSEL2
Min.
Typ.
Max.
Unit
50
100
1000
Ω
0.5
1
2
kΩ
0.01
0.1
1
μF
−
0
1
μF
0.01
0.1
1
μF
0.001
0.1
0.22
μF
0.001
0.1
0.22
μF
−
1
−
kΩ
0.5
1
−
kΩ
Caution 1. The above constants may be changed without notice.
2. The example of connection shown above and the constant do not guarantee proper operation.
Perform thorough evaluation using the actual application to set the constant.
3. RVC1 to RVC6 and CVC1 to CVC6 should be the same constant, respectively.
4. Set up RVCn and CVCn as RVCn × CVCn ≥ 50 × 10^-6.
5. Set up RVDD and CVDS as 5 × 10^-6 ≤ RVDD × CVDS ≤ 100 × 10^-6.
6. Set (RVDD × CVDS) / (RVCn × CVCn) = 0.1.
Remark n = 1 to 6
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