S-8239BAA-M6T1U Datasheet, PDF (16/25 Pages) Seiko Instruments Inc – OVERCURRENT MONITORING IC

OVERCURRENT MONITORING IC FOR MULTI-SERIAL-CELL PACK
S-8239B Series
Rev.1.1_03
 5-serial-cell Protection Circuit Example
Figure 13 shows the 5-serial-cell protection circuit example used by the S-8239B Series and the S-8225A Series. Contact
our sales office when using the circuit other than the following protection circuit example.
EB+
FET4
100 Ω
FET2^*2
1 MΩ
1 MΩ
FET3
330 kΩ
RVM R_DOP
RDO
FET1^*2
VM
DP
S-8239B
Series
DO
VDD
VINI
VSS
RVDD 1 kΩ
CVDD
1 MΩ
CHA−
DIS−
CFET
RVINI
DFET
ZVINI
RSENSE
Figure 13
1 kΩ
1 kΩ
1 kΩ
1 kΩ
0.1 μF 0.1 μF
CTLD VDD _{0.1 μF 0.1 μF}
CTLC VC1
0.1 μF
CO
VC2
0.1 μF
DO
VC3
S-8225A
Series^*1
SEL1 VC4
0.1 μF
0.1 μF
SEL2 VC5
0.1 μF
CDT VC6
0.1 μF
CCT VSS
100 Ω
1 kΩ
1 kΩ
1 kΩ
1 kΩ
1 kΩ
1 kΩ
Table 7 Constants for External Components
Symbol
Min.
Typ.
Max.
Unit
R_VDD
R_VINI
R_SENSE
R_VM
R_DO^*3
R_DOP
C_VDD
300
470
1000
Ω
1
−
−
kΩ
0
−
−
mΩ
1
5.1
51
kΩ
−
5.1
−
kΩ
330
510
2000
kΩ
0.022
0.1
1
μF
*1. Refer to the data sheet of the S-8225A Series for the recommended value for external components
of the S-8225A Series.
*2. Use the products with the same model number for FET1 and FET2.
*3. Set up the optimal constant according to the FET in use.
Caution 1. The above constants may be changed without notice.
2. The example of connection shown above and the constants do not guarantee proper operation.
Perform thorough evaluation using the actual application to set the constant.
3. The DP pin should be open.
16