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S-8244AAGFM-CEGT2U Datasheet(PDF) 10 Page - Seiko Instruments Inc |
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S-8244AAGFM-CEGT2U Datasheet(HTML) 10 Page - Seiko Instruments Inc |
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10 / 32 page  BATTERY PROTECTION IC FOR 1-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION) S-8244 Series Rev.6.4_02 10 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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