S-8232ABFT-T2-G Seiko Instruments, S-8232ABFT-T2-G Datasheet - Page 20

• Manufacturer Part Number: S-8232ABFT-T2-G
• Description: IC BATT PROTECTION 2CELL 8-TSSOP
• Manufacturer: Seiko Instruments

Specifications of S-8232ABFT-T2-G

• Function: Over/Under Voltage Protection
• Battery Type: Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
• Voltage - Supply: 2 V ~ 16 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-TSSOP
• Product: Li-Ion Protection
• Output Voltage: 0.3 V
• Operating Supply Voltage: 2 V to 16 V
• Supply Current: 12.7 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 728-1031-2

20
BATTERY PROTECTION IC FOR 2-SERIAL-CELL PACK
S8232 Series
• After the overcurrent detection delay, if either one of battery voltages equals the overdischarge detection
• When one of the battery voltages is overdischarge detection voltage (V
Precautions
voltage (V
occurs because capacitor C3 sets all of delay times (refer to the Figure 9) .
becomes higher than the overcharge detection voltage (V
overcharge detection delay time (t
[Cause]
[Conclusion]
[Cause]
[Conclusion]
When overcurrent detection is released until t
battery voltage is lower than V
typical.
This phenomenon occurs when all battery voltage is nearly equal to the overdischarge voltage (V
after overcurrent detected. It means that the battery capacity is small and those must be charged in
the future. Even if the state changes to overdischarge status, the battery package capacity is same as
typical.
It is same as the overdischarge detection under the overcurrent status. It occurs because capacitor
C3 sets all of delay times.
This phenomenon occurs when one battery voltage is lower than overdischarge voltage (V
batteries are charged by charger. Since voltage difference between two batteries is large in this
situation, the S-8232 Series immediately stops the charging of the other battery to reduce voltage
difference. This action improves the safety of a battery pack and dose not do any harm to the pack.
DD1,2
) or lower, the overdischarge detection delay time becomes shorter than 10ms (min.). It
B attery
voltage
D O pin
voltage
V M pin
voltage
B attery
voltage
V 1
B attery
voltage
V 2
C O pin
voltage
Load connect
V
V
EB −
CU
V
V
V
0 V
V
IO V 2
IO V 1
V
E B −
D D
C C
C C
SS
SS
V
V
V
V
V
V
V
V
V
V
DD1, 2
) (refer to the Figure 10) .
C U
C D
D U
D D
C U
C D
D U
D D
C C
S S
Seiko Instruments Inc.
Overcharge detect
The over current delay
The over discharge delay
at that time, charging goes on. So delay time is shorter than
Charger connected
D elay tim e = 0
Figure 10
Figure 9
IOV1
, the capacitor C3 is charged by S-8232 Series. If all
The delay time becomes shorter than typical
The battery voltage is equal to
or less the overdischarge voltage (V
after stopping the overcurrent.
CU1, 2
), the IC detects the overcharge without the
Overdischarge state
DD1, 2
DD
)
) or lower and the other one
Rev.6.0
DD1, 2
) and
DD1, 2
_00
)