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APW8821 数据表(PDF) 4 Page - Anpec Electronics Coropration |
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APW8821 数据表(HTML) 4 Page - Anpec Electronics Coropration |
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4 / 24 page ![]() Copyright © ANPEC Electronics Corp. Rev. A.1 - Feb., 2011 APW8821 www.anpec.com.tw 4 Electrical Characteristics These specifications apply over T A = -40 ~ 85°C, unless otherwise specified. Typical values are at TA = 25°C, VCC=5V APW8821 Symbol Parameter Test Conditions Min. Typ. Max. Unit VOUT AND VFB VOLTAGE External REFIN output voltage tolerance, REFIN=1V -5 - 5 mV External REFIN adjustable output range 0.5 - 2.5 Internal FB adjustable output range 0.5 3.3 V Reference Voltage - 0.5 - V TA = 25 oC −0.4 − +0.4 % VREF Regulation Accuracy TA = -40 oC ~ 85 oC −0.6 − +0.6 % IFB FB Input Bias Current FB=0.5V - 0.02 0.1 µA RDIS VOUT Discharge Resistance - 20 32 Ω SUPPLY CURRENT IVCC VCC Input Bias Current VCC Current, REFIN=5V, VFB=0.55V, PHASE=0.5V - 250 400 µA IVCC_SHDN VCC Shutdown Current REFIN=GND, VCC=5V - 0 7 µA SWITCHING FREQUENCY AND DUTY AND INTERNAL SOFT START FSW Switching Frequency Vin=8V, VOUT=1V, IOUT=10A 315 350 385 kHz TON(MIN) Minimum on time - 110 - ns TOFF(MIN) Minimum off time VFB=0.45V, VPHASE=-0.1V 350 450 550 ns TSS Internal Soft Start Time VOUT from 0% to 95%Regulation - 1.0 - ms GATE DRIVER UG Pull-Up Resistance BOOT-UG=0.5V - 1.5 3 Ω UG Sink Resistance UG-PHASE=0.5V - 0.7 1.8 Ω LG Pull-Up Resistance PVCC-LG=0.5V - 1.0 2.2 Ω LG Sink Resistance LG-PGND=0.5V - 0.5 1.2 Ω UG to LG Dead time UG falling to LG rising - 20 - ns LG to UG Dead time LG falling to UG rising - 20 - ns BOOTSTRAP SWITCH VF Ron VVCC – VBOOT-GND, IF = 10mA - 0.3 0.4 V IR Reverse Leakage VBOOT-GND = 30V, VPHASE = 25V, VVCC = 5V - - 0.5 µA VCC POR THRESHOLD VVCC_THR Rising VCC POR Threshold Voltage 4.25 4.35 4.45 V VCC POR Hysteresis - 100 - mV |
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