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S-8244AAAPH-CEATFU Datasheet, PDF (11/32 Pages) Seiko Instruments Inc – BATTERY PROTECTION IC FOR 1-SERIAL TO 4-SERIAL-CELL PACK | |||
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BATTERY PROTECTION IC FOR 1-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION)
Rev.6.4_02
S-8244 Series
(4) Test Condition 4, Test Circuit 1
Set switches 1 and 2 to OFF for CMOS output product.
Set switch 1 to ON and switch 2 to OFF for Nch open drain product.
Set switch 1 to OFF and switch 2 to ON for Pch open drain product.
⢠Product with CMOS output active âHâ, Nch open drain output active âHâ
The overcharge detection voltage 4 (VCU4) is a voltage at V4; when the CO pinâs voltage is set to âHâ by increasing
V4 gradually, after setting V1 = V2 = V3 = V4 = 3.5 V. After that, gradually decreasing V4âs voltage to set CO = âLâ,
and the difference of this V4âs voltage and VCU4 is the overcharge hysteresis voltage 4 (VCD4).
⢠Product with CMOS output active âLâ, Nch open drain output active âLâ, Pch open drain output active âLâ
The overcharge detection voltage 4 (VCU4) is a voltage at V4; when the CO pinâs voltage is set to âLâ by increasing
V4 gradually, after setting V1 = V2 = V3 = V4 = 3.5 V. After that, gradually decreasing V4âs voltage to set CO =
âHâ, and the difference of this V4âs voltage and VCU4 is the overcharge hysteresis voltage 4 (VCD4).
(5) Test Condition 5, Test Circuit 2
Set switches 1 and 2 to OFF for CMOS output product.
Set switch 1 to ON and switch 2 to OFF for Nch open drain product.
Set switch 1 to OFF and switch 2 to ON for Pch open drain product.
⢠Product with CMOS output active âHâ, Nch open drain output active âHâ
Rise V1 to 4.7 V momentarily within 10 μs after setting V1 = V2 = V3 = V4 = 3.5 V. The period from V1 having
reached 4.7 V to CO = âHâ is the overcharge detection delay time (tCU).
⢠Product with CMOS output active âLâ, Nch open drain output active âLâ, Pch open drain output active âLâ
Rise V1 to 4.7 V momentarily within 10 μs after setting V1 = V2 = V3 = V4 = 3.5 V. The period from V1 having
reached 4.7 V to CO = âLâ is the overcharge detection delay time (tCU).
(6) Test Condition 6, Test Circuit 3
Measure current consumption (I1) setting V1 = V2 = V3 = V4 = 2.3 V. This I1 is current consumption at power-down
(IPDN).
Measure current consumption (I1) setting V1 = V2 = V3 = V4 = 3.5 V. This I1 is current consumption during normal
operation (IOPE), I2 is the VC1 sink current (IVC1), I3 is the VC2 sink current (IVC2), I4 is the VC3 sink current (IVC3).
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