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FAN7529

Fairchild Semiconductor
Part Number FAN7529
Manufacturer Fairchild Semiconductor
Description Critical Conduction Mode PFC Controller
Published Dec 23, 2006
Detailed Description FAN7529 Critical Conduction Mode PFC Controller FAN7529 Critical Conduction Mode PFC Controller April 2007 Features „...
Datasheet PDF File FAN7529 PDF File

FAN7529
FAN7529

Overview
FAN7529 Critical Conduction Mode PFC Controller FAN7529 Critical Conduction Mode PFC Controller April 2007 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 Applications „ Adapter „ Ballast „ LCD TV, CRT TV „ SMPS Related Application Notes „ AN-6026 - Design of Power Factor Correction Circuit Using FAN7529 Description The FAN7529 is an active power factor correction (PFC) controller for boost PFC applications that operates in critical 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 signal.
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 necessary for the current-mode CRM PFC controller.
FAN7529 provides many protection functions, such as over-voltage protection, open-feedback protection, overcurrent protection, and under-voltage lockout protection.
The FAN7529 can be disabled if the INV pin voltage is lower than 0.
45V and the operating current decreases to 65µA.
Using a new variable on-time control method, THD is lower than the conventional CRM boost PFC ICs.
Ordering Information Part Number FAN7529N FAN7529M FAN7529MX Operating Temp.
Range -40°C to +125°C -40°C to +125°C -40°C to +125°C Pb-Free Yes Yes Yes Package 8-DIP 8-SOP 8-SOP Packing Method Rail Rail Tape & Reel Marking Code FAN7529 FAN7529 FAN7529 © 2006 Fairchild Semiconductor Corporation FAN7529 Rev.
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2 www.
fairchildsemi.
com FAN7529 Critical Conduction Mode PFC Controller Typical Application Diagrams...


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