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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SC471AEVB датащи(PDF) 4 Page - Semtech Corporation |
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SC471AEVB датащи(HTML) 4 Page - Semtech Corporation |
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4 / 27 page  4 © 2008 Semtech Corp. SC471/SC471A www.semtech.com POWER MANAGEMENT Electrical Characteristics (continued) Parameter Conditions 25°C -40° to 85°C Units Min Typ Max Min Max Regulation Line Regulation Error Typical Application Circuit 0.04 %/V Load Regulation Error Typical Application Circuit 0.3 % Timing On-Time VOUT = 1.1V 250 225 275 ns Minimum On-Time 100 ns Minimum Off-Time 350 ns Maximum Duty Cycle V BAT = VOUT + 0.2 FB < 0.7V 85 80 % Soft-Start Soft-Start Time I OUT = ILIM/2 1000 μs Analog Inputs/Outputs VOUT Input Resistance 500 kΩ FB Input Bias Current -1 +1 μA Current Sense Zero Crossing Detector Threshold LX - GND 0 -7 +7 mV Power Good Power Good Threshold 1% Hysteresis Typical -20% -17% -23% V Threshold Delay Time(1) 5 μs Voltage Transition Blank Time(1) G0 or G1 Transition 32 clks 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 |
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