FAN7529_07 Datasheet, PDF (14/20 Pages) Fairchild Semiconductor – Critical Conduction Mode PFC Controller

Typical Application Circuit
Application
Output Power
Input Voltage
Ballast
100W
Universal input
(85~265V_AC)
Features
„ High efficiency (>90% at 85V_AC input)
„ Low Total Harmonic Distortion (THD) (<10% at 265V_AC input, 25W load)
Key Design Notes
„ R1, R2, R5, C11 should be optimized for best THD characteristic.
1. Schematic
Output Voltage
400V
BD
NTC
C3 C4
C2
LF1
C1
V1
F1
AC INPUT
C5
R3
T1
V_AUX
D2
R4
C10
R5
D3
Q1
ZD1
C11
R6
D1
87
6
5
V_CC OUT GND ZCD
R9
R2
FAN7529
INV COMP MOT CS
1
2
3
4
R8
R7
C8 ^{C7 R1}
C6
Figure 37. Schematic
PFC OUTPUT
R10
C9
R11
FAN7529 Rev. 00
© 2006 Fairchild Semiconductor Corporation
FAN7529 Rev. 1.0.2
14
www.fairchildsemi.com