1-338

Power MOSFET/IGBT Gate

Drive Optocouplers

Technical Data

HCPL-3100

HCPL-3101

Features

• High Output Current

I

Continuous)

• 1.5 kV/

Mode Rejection (CMR) at

V

• Wide Operating V

(15 to 30 Volts)

• High Speed

1

µs Typical Propagation Delay

(HCPL-3100)

0.3

µs Typical Propagation

Delay (HCPL-3101)

• Recognized under UL 1577

for Dielectric Withstand

Proof Test Voltages of 5000

Vac, 1 Minute

Applications

• Isolated MOSFET/IGBT Gate

Drive

• AC and DC Motor Drives

• General Purpose Industrial

Inverters

• Uninterruptable Power

Supply

Description

The HCPL-3100/3101 consists of

an LED* optically coupled to an

integrated circuit with a power

output stage. These optocouplers

are suited for driving power

MOSFETs and IGBTs used in

motor control inverter applica-

tions. The high operating voltage

range of the output stage provides

the voltage drives required by

gate controlled devices. The

voltage and current supplied by

these optocouplers allow for

direct interfacing to the power

device without the need for an

intermediate amplifier stage.

The HCPL-3100 switches a 3000

pF load in 2

µs and the HCPL-

3101, using a higher speed LED,

switches a 3000 pF load in 0.5

µs.

With a CMR rating of 5 kV/

µs

typical these optocouplers readily

reject transients found in inverter

applications.

The LED controls the state of the

output stage. Transistor Q2 in the

output stage is on with the LED

off, allowing the gate of the power

device to be held low. Turning on

the LED turns off transistor Q2

and switches on transistor Q1 in

the output stage which provides

current and voltage to drive the

gate of the power device.

CAUTION: It is advised that normal static precautions be taken in handling and assembly of this component to

prevent damage and/or degradation which may be induced by ESD.

Functional Diagram

*HCPL-3100 LED contains Silicon-doped GaAs and HCPL-3101 LED contains AlGaAs.

H

Q2

Q1

8

7

6

5

V

GND

V

V

1

2

3

4

ANODE

CATHODE

HCPL-3100

O2

O1

CC

Q2

Q1

8

7

6

5

V

GND

V

V

1

2

3

4

ANODE

CATHODE

HCPL-3101

O2

O1

CC

TRUTH TABLE

LED

ON

OFF

OUTPUT

HIGH LEVEL

LOW LEVEL

Q1

ON

OFF

Q2

OFF

ON

THE USE OF A 0.1

µF BYPASS CAPACITOR CONNECTED BETWEEN PINS 8 AND 7

IS RECOMMENDED. ALSO CURRENT LIMITING RESISTOR IS RECOMMENDED

(SEE FIGURE 1, AND NOTE 2 AND NOTE 7).

5965-3583E