FAN7535 Ver la hoja de datos (PDF) - Fairchild Semiconductor

Número de pieza

componentes Descripción

Fabricante

FAN7535

PFC & Ballast Control IC

Fairchild Semiconductor 

Internal Block Diagram

VDDB 1

RT 3

CPH 5

10V REG

15V SHUNT

REGULATOR

IPH

=0.6*IRT

BIAS & SYSTEM LATCH

PRE-HEAT

CTRL

IPH

4V

CPH

0A

CPH

3V 5V

BGR UVLO

BIAS TSD

UVLO

RQ

SQ

SYSHALT

SDH

SDL

CPH<3V

Yes

1.6uA

9.6uA No

OSCILLATOR

DEAD-TIME CTRL

VDDH/VDD

LSH

VDDH/VDD

LSH

SDL

SDH

HIGH-SIDE DRIVER

VB

UVLO

Noise

Canceller

SQ

RQ

VS

SET

RESET

LOW-SIDE GATE DRIVER

DELAY

5V/3V

SDL

ADAPTIVE ZVS ENABLE LOGIC

SQ

SDH R Q RESET

SYSHALT

ADAPTIVE

ZVS CONTROLLER

TRANSITION

SENSING

24 VB

22 HO

20 VS

18 LO

6 GND

VDDP 17

-

+

12V

8.5V

Disable

ZCD 13

6.7V

-

+

Zero Current Detector

CS 12

1.4V

1.5V

40k

8pF

2.9V

MOT 10

Saw Tooth

Generator

Ramp signal

Zero Current

0.8V Comparator

1V offset

Timer

S

Q

R

2.5V Ref

Internal Bial

VDDP

Driver

Output

16 OUT

OVP

-

+

2.675V

2.5V

Disable

Vref

-

0.45V

+

0.35V

Error

Amplifier

Gm

7

1V~5V

Range

INV

8

Comp

Figure 2. Functional Block Diagram (2chips-1PKG)

© 2007 Fairchild Semiconductor Corporation

FAN7535 Rev. 1.0.0

3

www.fairchildsemi.com

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