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FAN7528 Datasheet(PDF) 2 Page - Fairchild Semiconductor

Part # FAN7528
Description  Dual-Output, Critical Conduction Mode PFC Controller
Download  21 Pages
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Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN7528 Datasheet(HTML) 2 Page - Fairchild Semiconductor

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© 2005 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN7528 Rev. 1.0.6
2
Typical Application Diagrams
Figure 1. Typical Boost PFC Application
Internal Block Diagram
Figure 2. Functional Block Diagram of FAN7528
GND
ZCD
INV
V
CC
AC IN
V
O
COMP
FAN7528
CS
MOT
R1
R2
LD
C
O
N
AUX
V
AUX
R
ZCD
FAN7528 Rev. 1.01
INV
Error
Amplifier
OVP
COMP
8pF
40k
2.5V
Ref
Internal
Bias
160
μs
Timer
V
CC
ZCD
CS
UVLO
6.7V
12V
8.5V
2.66V
2.55V
OCP
Comparator
1V Offset
MOT
GND
Sawtooth
Generator
Zero Current
Detector
R
S
Q
3
6
4
5
2
1
8
Dual-Output Reference
Generator
1.5V/2.5V
Gm
V
ref
0.8V
Disable
0.45V 0.35V
Disable
1.5V
1.4V
7
Vcc
OUT
Drive
Output
13V
V
CC=8.5V Reference Set
V
CC=4.5V Reference Reset
Ramp
Signal
1V ~ 5V
Range
FAN7528 Rev. 1.00


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