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FAN4800AUN Datasheet(PDF) 3 Page - Fairchild Semiconductor |
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FAN4800AUN Datasheet(HTML) 3 Page - Fairchild Semiconductor |
3 / 20 page © 2011 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN4800AU/CU • Rev. 1.0.0 3 Application Diagrams AC IEA ILIMIT FBPWM SS ISENSE IAC GND OPFC VDD FBPFC VEA VDD OPWM LBoost CBulk DBoost RSENSE RFilter 12V 5V FBPWM RFB1 RD CFB 1nF FBPWM CFilter CVIN 10Ω 10KΩ Q1 RFBPFC1 RFBPFC2 RFBPFC3 CFBPFC 10Ω 10KΩ 10KΩ Q2 Q3 DF1 DF2 RIEA CIEA1 CIEA2 RVEA CVEA1 CVEA2 CSS RILIMIT RFilter CFilter CVDD Lm RFB2 RFB3 10Ω VREF 47nF VRMS RT/CT RAMP RFB4 3MΩ 3MΩ 1MΩ 1MΩ 200KΩ 36KΩ 220nF RFBPWM RRAMP CRAMP RT CT 12V 5V Figure 2. Current Mode AC IEA ILIMIT FBPWM SS ISENSE IAC GND OPFC VDD FBPFC VEA VDD OPWM LBoost CBulk DBoost RSENSE RFilter 12V 5V FBPWM RFB1 RD CFB 1nF FBPWM CFilter CVin 10Ω 10KΩ Q1 RFBPFC1 RFBPFC2 RFBPFC3 CFBPFC 10Ω 10KΩ 10KΩ Q2 Q3 DF1 DF2 RIEA CIEA1 CIEA2 RVEA CVEA1 CVEA2 CSS RILIMIT RFilter CFilter CVDD Lm RFB2 RFB3 10Ω VREF 47nF VRMS RT/CT RAMP RFB4 3MΩ 3MΩ 1MΩ 1MΩ 200KΩ 36KΩ 220nF RFBPWM RRAMP CRAMP RT CT 12V 5V Figure 3. Voltage Mode |
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