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FAN6754BMRMY Fiches technique(PDF) 4 Page - Fairchild Semiconductor |
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FAN6754BMRMY Fiches technique(HTML) 4 Page - Fairchild Semiconductor |
4 / 24 page © 2010 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN6921AMR • Rev. 1.0.2 4 Marking Information 1 - Fairchild Logo Z - Plant Code X - Year Code (1-Digit for SOP, 2-Digit for DIP) Y - Week Code (1-Digit for SOP, 2-Digit for DIP) TT–Die-Run Code F - Frequency (M=Low, H=High Level) O - OLP Mode (L=Latch, R=Recovery) T - Package Type (N=DIP, M=SOP) P - Y:Green Package M - Manufacture Flow Code 16 ZXYTT FAN6921AFO TPM Figure 3. Marking Diagram Pin Configuration GND DET FB RT VIN ZCD NC HV OPWM VDD OPFC CSPWM CSPFC INV COMP RANGE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Figure 4. Pin Configuration Pin Definitions Pin # Name Description 1 RANGE RANGE pin’s impedance changes according to the VIN pin voltage level. When the input voltage detected by the VIN pin is lower than a threshold voltage, it sets to high impedance; whereas it sets to low impedance if input voltage is at a high level. 2 COMP Output pin of the error amplifier. Transconductance-type error amplifier for PFC output voltage feedback. Proprietary multi-vector current is built-in to this amplifier; therefore, the compensation for PFC voltage feedback loop allows a simple compensation circuit between this pin and GND. 3 INV Inverting input of the error amplifier. This pin is used to receive PFC voltage level by a voltage divider and provides PFC output over- and under-voltage protections. 4 CSPFC Input to the PFC over-current protection comparator that provides cycle-by-cycle current limiting protection. When the sensed voltage across the PFC current-sensing resistor reaches the internal threshold (0.82 V typical), the PFC switch is turned off to activate cycle-by-cycle current limiting. 5 CSPWM Input to the comparator of the PWM over-current protection and performs PWM current-mode control with FB pin voltage. A resistor is used to sense the switching current of the PWM switch and the sensing voltage is applied to the CSPWM pin for the cycle-by-cycle current limit, current- mode control, and high / low line over-power compensation according to the DET pin source current during PWM tON time. Continued on the following page… |
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