FAN7529M Datasheet

Critical Conduction Mode PFC Controller


The FAN7529M is an active power factor correction (PFC) controller for boost PFC applications that operates in crit-ical conduction mode (CRM). It uses the voltage mode PWM that compares an internal ramp signal with the error amplifier output to generate MOSFET turn-off sig-nal. Because the voltage-mode CRM PFC controller does not need rectified AC line voltage information, it saves the power loss of the input voltage sensing network neces-sary for the current-mode CRM PFC controller. FAN7529M Features • Low Total Harmonic Distortion (THD)• Precise Adjustable Output Over-Voltage Protection• Open-Feedback Protection and Disable Function• Zero Current Detector• 150µs Internal Start-up Timer • MOSFET Over-Current Protection• Under-Voltage Lockout with 3.5V Hysteresis• Low Start-up (40µA) and Operating Current (1.5mA)• Totem Pole Output with High State Clamp• +500/-800mA Peak Gate Drive Current• 8-Pin DIP or 8-Pin SOP FAN7529M Applications • Adapter• Ballast• LCD TV, CRT TV• SMPS


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