©2004 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FOD2741A, FOD2741B, FOD2741C Rev. 1.0.1

2

Pin Definitions

*The compensation network must be attached between pins 6 and 7.

Typical Application

Pin Number

Pin Name

Pin Description

1NC

Not connected

2C

Phototransistor Collector

3E

Phototransistor Emitter

4NC

Not connected

5

GND

Ground

6

COMP

Error Amplifier Compensation. This pin is the output of the error amplifier.*

7FBVoltage Feedback. This pin is the inverting input to the error amplifier

8

LED

Anode LED. This pin is the input to the light emitting diode.

R1

R2

2

3

8

6

7

5

PWM

Control

FAN4803

FOD2741