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APW8700 Datasheet(PDF) 4 Page - Anpec Electronics Coropration |
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APW8700 Datasheet(HTML) 4 Page - Anpec Electronics Coropration |
4 / 26 page Copyright © ANPEC Electronics Corp. Rev. A.1 - Jun., 2011 APW8700 www.anpec.com.tw 4 Electrical Characteristics (Cont.) APW8700 Symbol Parameter Test Conditions Min. Typ. Max. Unit CHIP ENABLE/FREQUENCY SETTING IRT/EN RT/EN Source Current RT/EN=GND - - 120 µA RT/EN Shutdown Threshold 0.45 0.5 0.55 V Enable Debounce time RT/EN high debounce - 200 - µs VRT/EN RT/EN Voltage RRT/ENB=33k Ω - 1 - V Switching Frequency Setting Range 100 - 800 kHz FOSC Free Run Switching Frequency RRT/EN=33k Ω 255 300 345 kHz ΔFOSC Switching Frequency Accuracy FOSC=200kHz~500kHz -15 - 15 % SOFT-START ISS Soft-start Current During Soft-start - 20 - µA SS Source/Sink Current Capability After Soft-start - 200 - µA OSCILLATOR Maximum Duty Cycle - 85 - % Minmum Duty Cycle - 0 - % ΔVOSC Ramp Amplitude VVCC=12V - 1.5 - V POWER SAVING MODE VPSI Threshold Voltage to Enter Dual Phase VPSI Rising 0.55 0.6 0.65 V ΔVPSI Hysteresis to Enter Single Phase VPSI Falling - 0.2 - V 2 Phase to single phase debounce Continuously - 0.2 - ms REFERENCE VOLTAGE VREF Reference Voltage Accuracy IREF=100µA, TJ= -20 oC ~ 70oC 1.98 2.00 2.02 V VREF Maximum Output Current VREF=GND 20 - - mA ΔVREF Reference Voltage Load Regulation IREF=0~2mA -5 - 5 mV VREFIN-VFB, VREFIN=0.8V~2V, RDRP=0 Ω -5 - 5 mV VFB Output Voltage Accuracy VFB operating range 0.2 - VREF V ERROR AMPLIFIER Open-Loop DC Gain (Note 4) RL = 10k Ω, C L =10pF - 80 - V/V Open-Loop Bandwidth (Note 4) RL = 10k Ω, C L =10pF - 20 - MHz Slew Rate (Note 4) RL = 10k Ω, C L =10pF - 8 - V/ µs FB Input Leakage Current VFB=1V - 0.1 0.5 µA COMP High Voltage RL = 10k Ω, C L =10pF - 4.8 - V/ µs VCOMP COMP Low Voltage RL = 10k Ω, C L =10pF - 0.2 - µA Maximum COMP Source Current VCOMP=2V - 2 - mA ICOMP Maximum COMP Sink Current VCOMP=2V - 2 - mA Refer to figure 1 in the “Typical Application Circuits”. These specifications apply over V VCC = 12V, TA= 25 oC, unless otherwise noted. |
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