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SC225KSIT Datasheet(PDF) 6 Page - SEC Electronics Inc. |
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SC225KSIT Datasheet(HTML) 6 Page - SEC Electronics Inc. |
6 / 13 page SC225KSIT 120 kHz Bandwidth, High Voltage Isolation Current Sensor with Integrated Overcurrent Detection 6/13 Fault Enable (FAULT_EN Pin) Input Low Voltage Threshold V IL – – 0.1 × V CC V Fault Enable (FAULT_EN Pin) Input High Voltage Threshold V IH 0.8 × V CC – – V Fault Enable (FAULT_EN Pin) Input Resistance R FEI – 1 – M Ω OVERCURRENT CHARACTERISTICS Fault Enable (FAULT_EN Pin) Delay 8 t FED Set FAULT_EN to low, V OC = 0.25 × V CC , COC = 0 F; then run a DC IP exceeding the corresponding overcurrent threshold; then reset FAULT_EN from low to high and measure the delay from the rising edge of FAULT_EN to the falling edge of ¯ FAULT – 15 – μs Fault Enable (FAULT_EN Pin) Delay(Non-Latching versions)9 t FED(NL) Set FAULT_EN to low, V OC = 0.25 × V CC , COC = 0 F; then run a DC IP exceeding the corresponding overcurrent threshold; then reset FAULT_EN from low to high and measure the delay from the rising edge of FAULT_EN to the falling edge of FAULT – 150 – ns Overcurrent Fault Response Time t OC FAULT_EN set to high for a minimum of 20 μs before the overcurrent event; switchpoint set at V OC = 0.25 × VCC ; delay from IP exceeding overcurrent fault threshold to V FAULT < 0.4 V, – 1.9 – μs Undercurrent Fault Response Time(Non-Latching versions) t UC FAULT_EN set to high for a minimum of 20 μs before the undercurrent event; switchpoint set at V OC = 0.25 × VCC ; delay from I P falling below the overcurrent faultthreshold to V FAULT > 0.8 × VCC , without external C OC capacitor, RPU = 330 kΩ – 3 – μs Overcurrent Fault Reset Delay t OCR Time from V FAULTEN < VIL to V FAULT > 0.8 × VCC , R PU = 330 kΩ – 500 – ns Overcurrent Fault Reset Hold Time t OCH Time from V FAULTEN <VIL to rising edge of V FAULT – 250 – ns Overcurrent Input Pin Resistance R OC T A = 25°C, VOC pin to GND 2 – – MΩ VOLTAGE REFERENCE CHARACTERISTICS Voltage Reference Output V ZCR T A = 25 °C (Not a highly accurate reference) 0.48×V CC 0.5×V CC 0.51×VCC V Voltage Reference Output Load Current I ZCR Source current 3 – – mA Sink current 50 – – μA Voltage Reference Output Drift ∆V ZCR – ±10 – mV |
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