FAN7530MX View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

Manufacturer

FAN7530MX

Critical Conduction Mode PFC Controller

Fairchild Semiconductor 

Typical Application Diagrams

L

D

VO

AC

IN

VAUX

NAUX

RZCD

I2 R2 ZCD

CO

VCC

FAN7530

INV

MOT

CS

I1 COMP

R1

GND

FAN7530 Rev. 00

Figure 1. Typical Boost PFC Application

Internal Block Diagram

VCC 8

UVLO

12V 8.5V Disable

ZCD 5

6.7V 1.4V 1.5V

Zero Current

Detector

2.5V

Ref

Vref1

Internal

Bias

150ms

Timer

S

Q

R

VCC

Drive

Output

7 OUT

13V

OVP

2.675V 2.5V

CS 4

MOT 2

40k

8pF

0.8V

Current Protection

Comparator

Ramp

Signal

Saw Tooth

Generator

1V Offset

Disable

0.45V 0.35V

Error

Vref1

Amplifier

Gm

1V~5V

Range

1 INV

6

GND

3

COMP

Figure 2. Functional Block Diagram of FAN7530

FAN7530 Rev. 00

© 2006 Fairchild Semiconductor Corporation

FAN7530 Rev. 1.0.2

2

www.fairchildsemi.com

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