FAN7529 Datasheet, PDF (1/20 Pages) Fairchild Semiconductor – Critical Conduction Mode PFC Controller

FAN7529
Critical Conduction Mode PFC Controller
September 2006
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 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.
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. 1.0.0
www.fairchildsemi.com