FAN7527 데이터 시트보기 (PDF) - Fairchild Semiconductor

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FAN7527

Power Factor Correction Controller

Fairchild Semiconductor 

PIN Description

FAN7527

INV 1

EA_OUT 2

MULT 3

CS 4

(Top View)

8 Vcc

7 OUT

6 GND

5 ldet

Pin Number

1

2

3

4

5

6

7

8

Pin Name

INV

EA_OUT

MULT

CS

ldet

GND

OUT

Vcc

Pin Function Descrition

Inverting input of the error amplifier. The output of the boost converter

should be resistively divided to 2.5V and connected to this pin.

The output of the error amplifier. A feedback conpensation network is

placed between this pin and the INV pin.

Input to the multiplier stage. The full-wave rectified AC is devided to

less than 2V and is connected to this pin.

Input to the PWM comparator. Current is sensed in the boost stage

MOSFET by a resistor in the source lead. An internal leading edge

blanking circuitry has been included to reject any high frequency noise

present on the current waveform.

The zero current detector senses the inductor current by monitoring

when the boost inductor auxilary winding voltage falls below 1.8V. If it

is connected to GND, the device is disabled.

The ground potential of all the pins.

Gate driver output . A push pull output stage is able to drive the Power

MOSFET with peak current of 400mA.

Supply voltage of driver and control circuits.

3

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