FAN7528 Fairchild Semiconductor, FAN7528 Datasheet - Page 15

• Manufacturer Part Number: FAN7528
• Description: Dual Output Critical Conduction Mode PFC Controller
• Manufacturer: Fairchild Semiconductor

FAN7528 Rev. 1.0.1
Typical application circuit
Features
• High efficiency (>90% at 90Vac input)
• Low THD(total harmonic distortion) (<10% at 264Vac input)
• Dual output control
Key Design Notes
• Diode D4 is used to prevent IC malfunction that can happen if the CS pin voltage is lower than -0.3V.
• Important Component s for low THD are R2, R5 and C11.
1. Schematic
Application
NTC
LF1
Adapter
F1
AC INPUT
BD
C3 C4
C2
C1
V1
Output power
C5
100W
R3
C6
ZD1
R2
C10
Figure 39. Schematic
R8
C8
R4
V
C7
AUX
D1
Input voltage
FAN7528
Universal input
(90~264Vac)
R1
15
C11
R5
T1
D4
D3
R6
R7
Q1
D2
Output voltage
389V/232V
R10
R11
PFC OUTPUT
C9
www.fairchildsemi.com