S-8235AAA-TCT1U Datasheet, PDF (12/24 Pages) Seiko Instruments Inc – FOR AUTOMOTIVE BATTERY PROTECTION IC

FOR AUTOMOTIVE BATTERY PROTECTION IC FOR 3-SERIAL TO 5-SERIAL CELL PACK (SECONDARY PROTECTION)
S-8235A Series
Rev.1.7_00
 Battery Protection IC Connection Example
1. 8-serial cell (5-cell + 3-cell, cascade connection)
R_VDD
RVC1
R_VC2
R_VC3
RVC4
R_VC5
R_VSS
R_NPI
C_VDD
CVC1
C_VC2
C_VC3
C_VC4
C_VC5
C_VSS
C_NPI
1 VDD
CTL 16
2 VC1
CAI 15
3 VC2
CLKO 14
4 VC3
RSTO 13
S-8235A
5 VC4 ₍₂₎ RSTI 12
6 VC5
CLKI 11
7 VSS
CAO 10
8 NPI
CO 9
1 kΩ
1 kΩ
R_IFRST
R_IFCLK
1000 pF 1000 pF
EB+
R_VDD
R_VC1
R_VC2
R_VC3
R_VC4
R_VC5
R_VSS
RNPI
C_VDD
C_VC1
C_VC2
C_VC3
C_VC4
C_VC5
C_VSS
CNPI
1 VDD
CTL 16
2 VC1
CAI 15
3 VC2
CLKO 14
4 VC3
RSTO 13
S-8235A
5 VC4 ₍₁₎ RSTI 12
6 VC5
CLKI 11
7 VSS
CAO 10
8 NPI
CO 9
Figure 7
1000 pF
1000 pF
R_IFC
R_IFCA
1 kΩ
1 kΩ
1 kΩ
1 kΩ
Input for reset signal
Input for clock signal
Output for chip active signal
Output for charge control
EB−
Table 7 Constants for External Components
Part
Min.
Typ.
Max.
Unit
R_VDD, R_NPI
R_VCn, R_VSS
R_IFC, R_IFCA, R_IFCLK, R_IFRST
C_VDD, C_NPI
C_VCn, C_VSS
0.1
1
0.25
1.2
−
5.1
0.075
0.1
0.075
0.1
1
kΩ
1.2
kΩ
−
MΩ
1
μF
1
μF
Caution 1. The above constants are subject to change without prior notice.
2. The example of connection shown above and the constants will not guarantee successful
operation. Perform thorough evaluation using the actual application to set the constants.
3. R_VC1 to R_VC5 should be the same constant. C_VDD, C_VC1 to C_VC5, C_VSS, and C_NPI should be the same
constant.
4. Set R_VDD and C_VDD so that the condition R_VDD × C_VDD ≥ 7.5 × 10^-5 is satisfied.
5. Set R_VCn and C_VCn so that the condition 1.0 ≤ (R_VCn × C_VCn) / (R_VDD × C_VDD) ≤ 1.2 is satisfied.
6. Connect R_IFC, R_IFCA, R_IFCLK, and R_IFRST as close to the input pin as possible.
Remark n = 1 to 5
12