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IR1155S Datasheet(PDF) 4 Page - International Rectifier |
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IR1155S Datasheet(HTML) 4 Page - International Rectifier |
4 / 21 page IR1155S www.irf.com 4 © 2011 International Rectifier Oscillator Section Parameter Symbol Min. Typ. Max. Units Remarks Switching Frequency FSW 48 200 kHz 200khz:C=430pF approx. 48kHz: C=2nF approx. Oscillator Charge Current IOSC(CHG) 200 µA Oscillator Discharge Current IOSC(DCHG) 6.6 mA Oscillator Peak VOSC PK 4 V Oscillator Valley VOSC VAL 2 V 5 % C=2nF, TA = 25°C Initial Accuracy FSW ACC 8 % C=500pF, TA = 25°C Voltage Stability VSTAB 0.2 1 % 14V < VCC < 19V Temperature Stability TSTAB 2 % -25°C ≤ TJ ≤ 125°C Total Variation FVT 10 % Line & Temperature Maximum Duty Cycle DMAX 94 99 % Minimum Duty Cycle DMIN 0 % Pulse Skipping Protection Section Parameter Symbol Min. Typ. Max. Units Remarks Open Loop Protection (OLP) VFB Threshold V OLP 17 19 21 % VREF Bias on VFB pin Output Over Voltage Protection (OVP) V OVP 104.5 106.5 108.5 % VREF Bias on OVP/EN pin Output Over Voltage Protection (OVP) Reset VOVP(RST) 100.2 102.2 104.2 % VREF Bias on OVP/EN pin Peak Current Limit Protection (IPK LMT) ISNS Voltage Threshold V ISNS -0.85 -0.77 -0.69 V Bias on ISNS pin OVP Input Bias Current IOVP(Bias) -0.2 µA |
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