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FAN5234QSCX 数据表(PDF) 4 Page - Fairchild Semiconductor |
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FAN5234QSCX 数据表(HTML) 4 Page - Fairchild Semiconductor |
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4 / 15 page  PRODUCT SPECIFICATION FAN5234 4 REV. 1.0.10 5/3/04 Electrical Specifications Recommended operating conditions, unless otherwise noted. Parameter Conditions Min. Typ. Max. Units Power Supplies VCC Current LDRV, HDRV Open, VSEN forced above regulation point 850 1300 µA Shut-down (EN=0) 5 15 µA VIN Current - Sinking VIN pin = input voltage source 10 20 30 µA VIN Current - Sourcing VIN pin = GND 7 15 20 µA VIN Current - Shut-down 1 µA UVLO Threshold Rising VCC 4.3 4.55 4.75 V Falling 4.1 4.27 4.5 V Hysteresis 0.1 0.5 V Oscillator Frequency VIN > 5V 255 300 345 KHz VIN = 0V 510 600 690 KHz Ramp Amplitude, pk–pk VIN = 16V 2 V Ramp Amplitude, pk–pk VIN < 5V 1.25 V Ramp Offset 0.5 V Ramp / VIN Gain VIN > 3V 125 mV/V Ramp / VIN Gain 1V < VIN < 3V 250 mV/V Reference and Soft Start Internal Reference Voltage 0.891 0.9 0.909 V Soft Start current (ISS) at start-up 5 µA Soft Start Complete Threshold 1.5 V PWM Converter Load Regulation IOUT from 0 to 3A, VIN from 2 to 24V -1 +1 % VSEN Bias Current 50 80 120 nA VOUT pin input impedance 40 55 65 K Ω Under-voltage Shutdown as % of set point. 2 µS noise filter 70 75 80 % ISNS Over-Current threshold RILIM = 68.5KΩ. See Figure 4 115 144 172 µA Over-voltage threshold as % of set point. 2 µS noise filter 113 120 % Output Driver HDRV Output Resistance Sourcing 8 15 Ω Sinking 3.2 4 Ω LDRV Output Resistance Sourcing 8 15 Ω Sinking 1.5 2.4 Ω PGOOD (Power Good Output) and Control pins Lower Threshold as % of set point, 2 µS noise filter 86 92 % Upper Threshold as % of set point, 2 µS noise filter 110 115 % PGOOD Output Low IPGOOD = 4mA 0.5 V Leakage Current VPULLUP = 5V 1 µA Soft Start Voltage when PGOOD Enabled 1.5 V EN, FPWM Inputs Input High 2 V Input Low 0.8 V |
类似零件编号 - FAN5234QSCX |
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类似说明 - FAN5234QSCX |
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