FAN7529

Manufacturer Part NumberFAN7529
DescriptionCritical Conduction Mode PFC Controller
ManufacturerFairchild Semiconductor
FAN7529 datasheet

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FAN7529
Critical Conduction Mode PFC Controller
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
Ordering Information
Operating Temp.
Part Number
Range
FAN7529N
-40°C to +125°C
FAN7529M
-40°C to +125°C
FAN7529MX
-40°C to +125°C
© 2006 Fairchild Semiconductor Corporation
FAN7529 Rev. 1.0.0
Description
The FAN7529 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.
FAN7529 provides many protection functions, such as
over-voltage protection, open-feedback protection, over-
current 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.
Pb-Free
Package
Packing Method
Yes
8-DIP
Yes
8-SOP
Yes
8-SOP
September 2006
Marking
Code
Rail
FAN7529
Rail
FAN7529
Tape & Reel
FAN7529
www.fairchildsemi.com

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