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© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7530 Rev. 1.0.0 2 Typical Application Diagrams Figure 1. Typical Boost PFC Application Internal Block Diagram Figure 2. Functional Block Diagram of FAN7530 GND ZCD INV V CC AC IN V O COMP FAN7530 CS MOT R1 R2 LD N AUX V AUX R ZCD I2 I1 C O FAN7530 Rev. 00 INV Error Amplifier Vref OVP COMP 8pF 40k 2.5V Ref Internal Bias 150ms Timer V CC ZCD CS UVLO 6.5V 12V 8.5V 2.675V 2.5V Current Protection Comparator 1V Offset MOT GND Sawtooth Generator Zero Current Detector R S Q 2 6 4 5 3 1 8 Vref Gm 0.8V Disable 0.45V 0.35V Disable 1.5V 1.4V 7 V CC OUT Drive Output Ramp Signal 1V~5V Range 13V FAN7530 Rev. 00 |
