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 applications. 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 15 kV/µs

typical these opto-couplers 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.

Features

• High output current I

• 15 kV/

µs minimum Common Mode Rejection (CMR) at

V

• Wide operating V

• 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

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

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).

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

LED contains AlGaAs.

HCPL-3100, HCPL-3101

Power MOSFET/IGBT Gate Drive Optocouplers

Data Sheet