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FOD3120

High Noise Immunity, 2.5A Output Current, Gate Drive Optocoupler

Fairchild Semiconductor 

October 2009

FOD3120

High Noise Immunity, 2.5A Output Current,

Gate Drive Optocoupler

Features

■ High noise immunity characterized by 35kV/µs

minimum common mode rejection

■ 2.5A peak output current driving capability for most

1200V/20A IGBT

■ Use of P-channel MOSFETs at output stage enables

output voltage swing close to the supply rail

■ Wide supply voltage range from 15V to 30V

■ Fast switching speed

– 400ns max. propagation delay

– 100ns max. pulse width distortion

■ Under Voltage LockOut (UVLO) with hysteresis

■ Extended industrial temperate range, -40°C to 100°C

temperature range

■ Safety and regulatory approved

– UL1577, 5000 VRMS for 1 min.

– IEC60747-5-2

■ RDS(ON) of 1Ω (typ.) offers lower power

dissipation

■ >8.0mm clearance and creepage distance

(option ‘T’ or ‘TS’)

■ 1,414V Peak Working Insulation Voltage (VIORM)

Applications

■ Industrial inverter

■ Uninterruptible power supply

■ Induction heating

■ Isolated IGBT/Power MOSFET gate drive

Description

The FOD3120 is a 2.5A Output Current Gate Drive

Optocoupler, capable of driving most 1200V/20A

IGBT/MOSFET. It is ideally suited for fast switching

driving of power IGBT and MOSFETs used in motor

control inverter applications, and high performance

power system.

It utilizes Fairchild’s proprietary coplanar packaging

technology, Optoplanar®, and optimized IC design to

achieve high noise immunity, characterized by high

common mode rejection.

It consists of a gallium aluminum arsenide (AlGaAs) light

emitting diode optically coupled to an integrated circuit

with a high-speed driver for push-pull MOSFET output

stage.

Related Resources

■ FOD3150, 1A Output Current, Gate Drive

Optocoupler Datasheet

■ www.fairchildsemi.com/products/opto/

Functional Block Diagram

Package Outlines

NC 1

ANODE 2

8 VCC

8

7 VO2

CATHODE 3

6 VO1

NC 4

5 VEE

Note:

A 0.1µF bypass capacitor must be connected between pins 5 and 8.

©2003 Fairchild Semiconductor Corporation

FOD3120 Rev. 1.17.0

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1

1

8

1

8

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www.fairchildsemi.com

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