S-8244ABKFM-CFKT2U データシートの表示（PDF） - Seiko Instruments Inc

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S-8244ABKFM-CFKT2U

BATTERY PROTECTION IC FOR 1-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION)

Seiko Instruments Inc 

BATTERY PROTECTION IC FOR 1-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION)

S-8244 Series

Rev.6.4_02

 Test Circuits

(1) Test Condition 1, 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 “H”, Nch open drain output active “H”

The overcharge detection voltage 1 (VCU1) is a voltage at V1; when the CO pin’s voltage is set to “H” by increasing

V1 gradually, after setting V1 = V2 = V3 = V4 = 3.5 V. After that, gradually decreasing V1’s voltage to set CO = “L”,

and the difference of this V1’s voltage and VCU1 is the overcharge hysteresis voltage 1 (VCD1).

• Product with CMOS output active “L”, Nch open drain output active “L”, Pch open drain output active “L”

The overcharge detection voltage 1 (VCU1) is a voltage at V1; when the CO pin’s voltage is set to “L” by increasing

V1 gradually, after setting V1 = V2 = V3 = V4 = 3.5 V. After that, gradually decreasing V1’s voltage to set CO =

“H”, and the difference of this V1’s voltage and VCU1 is the overcharge hysteresis voltage 1 (VCD1).

(2) Test Condition 2, 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 “H”, Nch open drain output active “H”

The overcharge detection voltage 2 (VCU2) is a voltage at V2; when the CO pin’s voltage is set to “H” by increasing

V2 gradually, after setting V1 = V2 = V3 = V4 = 3.5 V. After that, gradually decreasing V2’s voltage to set CO = “L”,

and the difference of this V2’s voltage and VCU2 is the overcharge hysteresis voltage 2 (VCD2).

• Product with CMOS output active “L”, Nch open drain output active “L”, Pch open drain output active “L”

The overcharge detection voltage 2 (VCU2) is a voltage at V2; when the CO pin’s voltage is set to “L” by increasing

V2 gradually, after setting V1 = V2 = V3 = V4 = 3.5 V. After that, gradually decreasing V2’s voltage to set CO =

“H”, and the difference of this V2’s voltage and VCU2 is the overcharge hysteresis voltage 2 (VCD2).

(3) Test Condition 3, 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 “H”, Nch open drain output active “H”

The overcharge detection voltage 3 (VCU3) is a voltage at V3; when the CO pin’s voltage is set to “H” by increasing

V3 gradually, after setting V1 = V2 = V3 = V4 = 3.5 V. After that, gradually decreasing V3’s voltage to set CO = “L”,

and the difference of this V3’s voltage and VCU3 is the overcharge hysteresis voltage 3 (VCD3).

• Product with CMOS output active “L”, Nch open drain output active “L”, Pch open drain output active “L”

The overcharge detection voltage 3 (VCU3) is a voltage at V3; when the CO pin’s voltage is set to “L” by increasing

V3 gradually, after setting V1 = V2 = V3 = V4 = 3.5 V. After that, gradually decreasing V3’s voltage to set CO =

“H”, and the difference of this V3’s voltage and VCU3 is the overcharge hysteresis voltage 3 (VCD3).

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