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IR1155S Datasheet(PDF) 8 Page - International Rectifier |
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IR1155S Datasheet(HTML) 8 Page - International Rectifier |
8 / 21 page IR1155S www.irf.com 8 © 2011 International Rectifier Block Diagram VREF VFB COMP VCOMP Discharge VOVP VOLP Q S R1 ISNS Vm OSCILLATOR COM VCC GATE RESET OVP V BIAS V BIAS V BIAS V BIAS V BIAS VBIAS MAX DUTY CYCLE LIMIT Blanking Pulse at Ton V BIAS V BIAS VCC Q RQ S1 250mV VISNS(PK) OVP VSLEEP Enable Comparator (SLEEP MODE) VBIAS FREQ RAMP + - VSUMMER V BIAS UVLO VOVP = 106% VREF VREF VOLP = 19%VREF Internal Rail & Precision Reference 250mV VSLEEP VOUV = 50% VREF 80% VREF OVP VCC OK PWM OFF GATE OFF GATE OFF RESET SET MAX DUTY OCP OSC BLANK 0 VCOMP Open Loop Comparator (Stand-By Mode) SLEEP (POWER OFF) UVLO/SLEEP STNDBY VCOMP Discharge Threshold Comparator Overvoltage Comparator Peak Overcurrent Comparator SLEEP |
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