FAN7529 ,Critical Conduction Mode PFC Controllerapplications that operates in crit- Precise Adjustable Output Over-Voltage Protectionical conducti ..
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FAN7529
Critical Conduction Mode PFC Controller
FAN7529 Critical Conduction Mode PFC Controller April 2007 FAN7529 Critical Conduction Mode PFC Controller Features Description Low Total Harmonic Distortion (THD) The FAN7529 is an active power factor correction (PFC) controller for boost PFC applications that operates in crit- Precise Adjustable Output Over-Voltage Protection ical conduction mode (CRM). It uses the voltage mode Open-Feedback Protection and Disable Function PWM that compares an internal ramp signal with the Zero Current Detector error amplifier output to generate MOSFET turn-off sig- 150µs Internal Start-up Timer nal. Because the voltage-mode CRM PFC controller does MOSFET Over-Current Protection not need rectified AC line voltage information, it saves the power loss of the input voltage sensing network neces- Under-Voltage Lockout with 3.5V Hysteresis sary for the current-mode CRM PFC controller. Low Start-up (40µA) and Operating Current (1.5mA) Totem Pole Output with High State Clamp FAN7529 provides many protection functions, such as over-voltage protection, open-feedback protection, over- +500/-800mA Peak Gate Drive Current current protection, and under-voltage lockout protection. 8-Pin DIP or 8-Pin SOP The FAN7529 can be disabled if the INV pin voltage is lower than 0.45V and the operating current decreases to Applications 65µA. Using a new variable on-time control method, Adapter THD is lower than the conventional CRM boost PFC ICs. Ballast LCD TV, CRT TV SMPS Related Application Notes AN-6026 - Design of Power Factor Correction Circuit Using FAN7529 Ordering Information Operating Temp. Marking Part Number Range Pb-Free Package Packing Method Code FAN7529N -40°C to +125°C Yes 8-DIP Rail FAN7529 FAN7529M -40°C to +125°C Yes 8-SOP Rail FAN7529 FAN7529MX -40°C to +125°C Yes 8-SOP Tape & Reel FAN7529 © 2006 FAN7529 Rev. 1.0.2
