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SC412AEVB 数据表(PDF) 3 Page - Semtech Corporation |
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SC412AEVB 数据表(HTML) 3 Page - Semtech Corporation |
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3 / 22 page ![]() Parameter Conditions 25°C -40° to 85°C Units Min Typ Max Min Max Timing On-Time Continuous Mode Operation V OUT = 1.1V 250 225 275 ns Minimum On-Time 100 ns Minimum Off-Time 350 Maximum Duty Cycle V BAT < VOUT +0.2 V OUT < On-Time Threshold 85 80 % Soft-Start Soft-Start Time I OUT = ILIM/2 1000 μs Analog Inputs/Outputs VOUT Input Resistance 500 kΩ Current Sense Zero-Crossing Detector Threshold LX - GND 0 -7 +7 mV Power Good Power Good Threshold 1% HysteresisTypical -12% -9% -15% % Threshold Delay Time(1) 1.5 μs Leakage 1 μA Fault Protection ILIM Source Current 10 9 11 μA ILIM Comparator Offset 0 -10 +10 mV Current Limit (Negative) LX - GND 80 60 100 mV Output Under-Voltage Fault FB with Respect to REF -30 -35 -25 % Steady-State Over-Voltage Fault FB with Respect to REF 20 +17 +23 % Over-Voltage Fault Delay(1) FB Forced 50mV Above Over-Voltage Fault Threshold 1.5 μs VCCA Under-Voltage (UVLO) Conditions = Falling Edge (Hysteresis 100mV) 4 3.7 4.35 V Over-Temperature Shutdown(1) 160 °C Logic Inputs/Outputs Logic Input Hgh Voltage EN 1.2 V Logic Input Low Voltage EN 0.4 V 3 © 2006 Semtech Corp. www.semtech.com SC412A POWER MANAGEMENT Electrical Characteristics (continued) |
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