S-8253A Datasheet, PDF (10/32 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 2-SERIAL OR 3-SERIAL-CELL PACK

BATTERY PROTECTION IC FOR 2-SERIAL OR 3-SERIAL-CELL PACK
S-8253A/B Series
Rev.3.7_00
„ Test Circuits
1. Overcharge Detection Voltage 1, Overcharge Release Voltage 1, Overdischarge Detection Voltage 1,
Overdischarge Release Voltage 1
(Test Condition 1, Test Circuit 1)
Confirm that V1 = V2 = 3.5 V (S-8253A Series), V1 = V2 = V3 = 3.5 V (S-8253B Series), V4 = 0 V, V5 = 0 V, and the COP
and DOP pins are “L” (V_DD × 0.1 V or lower) (this status is referred to as the initial status).
1. 1 Overcharge Detection Voltage 1 (V_CU1), Overcharge Release Voltage 1 (V_CL1)
Overcharge detection voltage 1 (V_CU1) is the voltage of V1 when the voltage of the COP pin is “H” (V_DD × 0.9 V or
more) after the V1 voltage has been gradually increased starting at the initial status. Overcharge release voltage 1
(V_CL1) is the voltage of V1 when the voltage at the COP pin is low after the V1 voltage has been gradually decreased.
1. 2 Overdischarge Detection Voltage 1 (V_DL1), Overdischarge Release Voltage 1 (V_DU1)
Overdischarge detection voltage 1 (V_DL1) is the voltage of V1 when the voltage of the DOP pin is high after the V1
voltage has been gradually decreased starting at the initial status. Overdischarge release voltage 1 (V_DU1) is the
voltage of V1 when the voltage at the DOP pin is low after the V1 voltage has been gradually increased.
By changing Vn (n = 2: S-8253A Series, n = 2, 3: S-8253B Series) the overcharge detection voltage (V_CUn), overcharge
release voltage (V_CLn), overdischarge detection voltage (V_DLn), and overdischarge release voltage (V_Dun) can be
measured in the same way as when n = 1.
2. Overcurrent Detection Voltage 1, Overcurrent Detection Voltage 2, Overcurrent Detection Voltage 3
(Test Condition 2, Test Circuit 1)
Confirm that V1 = V2 = 3.5 V (S-8253A Series), V1 = V2 = V3 = 3.5 V (S-8253B Series), V4 = 0 V, V5 = 0 V, and the COP
pin and DOP pin are low (this status is referred to as the initial status).
2. 1 Overcurrent Detection Voltage 1 (V_IOV1)
Overcurrent detection voltage 1 (V_IOV1) is the voltage of V5 when the voltages of the COP pin and DOP pin are high
after the V5 voltage has been gradually increased starting at the initial status.
2. 2 Overcurrent Detection Voltage 2 (V_IOV2)
Overcurrent detection voltage 2 (V_IOV2) is the voltage of V5 when the voltages of the COP pin and DOP pin are high
within the minimum and maximum values of overcurrent detection time 2 (t_IOV2) after the voltage of V5 was
instantaneously increased (within 10 µs) starting at the initial status.
2. 3 Overcurrent Detection Voltage 3 (V_IOV3)
Overcurrent detection voltage 3 (V_IOV3) is the voltage of V5 when the voltages of the COP pin and DOP pin are high
within the minimum and maximum values of overcurrent detection time 3 (t_IOV3) after the voltage of V5 was
instantaneously increased (within 10 µs) starting at the initial status.
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Seiko Instruments Inc.