IRMD22381Q

www.irf.com

1

IRMD22381Q Demo Board

For 3-phase / 380V motor drives

IRMD22381Q Demo Board

•

Up to 1200V DC-bus capability

•

Up to 25A maximum phase current

•

Optional on-board phase shunt resistors

•

IR22381Q device connected in 3-phase +

brake configuration

•

On-board bootstrap supply for high-side

gate drive

•

Full protection of phase-to-phase, DC-bus

and ground short circuit by monitoring IGBT

de-saturation

•

Brake IGBT de-saturation protection

•

Fault feedback to ground level

•

Trimmer programmable dead time

•

Anti-shoot-through management

•

Phase voltage feedback

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Undervoltage lockout

•

3.3V digital input/output CMOS compatible

•

IR22381Q can be replaced by IR21381Q

Power Module

•

Standard ECONO2-PIM IGBT module

compatible

•

IGBT short circuit rated up to 1200V/25A.

•

Easy to mount heat-sink holes

IR22381Q Demo Board

(Shown without IGBT Power Module)

Introduction

The IRMD22381Q demo board is an evaluation board for IR22381Q gate driver (see device datasheet for details).

IRMD22381Q is designed to drive 3-phase power modules with pin-out compatible to ECONO2-PIM. The board can

drive AC or Brushless motors using power modules with up to 25A output current. The board is a flexible solution for

different applications and can be customized by means reconfigurable components options. The control signals are 3.3V

CMOS compatible; three-phase shunt resistor (with sensing pins) can be placed for current loop control; power module

short circuits are managed by IR22381Q by synchronization of the IGBTs turn off. Board layout reduces the noise

coupling between high and low voltage signals.

Application Block Diagram

(Refer to connections section to see

the interface pins) This diagram

shows

the

main

blocks

and

connections of the demo board and

the external components necessary

in a typical motor drive application.

DCbus

AC/DC

Conveter

System

Control

3-phase

half bridge

(Power

Module)

Low Voltage

Power Supply

shunt

resistor

IR22381Q

shunt

resistor

shunt

resistor

3-phase

Current Sensor

Motor

IRMD22381Q + Power Module