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© 1998 IXYS All rights reserved

Inverter Interface and Digital Deadtime Generator

for 3-Phase PWM Controls

IXYS reserves the right to change limits, test conditions and dimensions.

Type

Package

Configuration

Temp. Range

IXDP630 PI

18-Pin Plastic DIP

RC Oscillator

-40°C to +85°C

IXDP631 PI

18-Pin Plastic DIP

Crystal Oscillator

-40°C to +85°C

Features

l

5 V HCMOS logic implementation

maintains low power at high speed

l

Schmitt trigger inputs and CMOS

logic levels improve noise immunity

l

Simultaneously injects equal dead-

time in up to three output phases

l

Replaces 10-12 standard SSI/MSI

logic devices

l

Allows a wide range of PWM

modulation strategies

l

Directly drives high speed

optocouplers

Applications

l

1- and 3- Phase Motion Controls

l

1- and 3- Phase UPS Systems

l

General Power Conversion Circuits

l

Pulse Timing and Waveform

Generation

l

General Purpose Delay and Filter

l

General Purpose Three Channel

"One Shot"

In the IXDP630, deadtime programming

is achieved by an internal RC oscillator.

In the IXDP631, programming is

achieved by use of a crystal oscillator.

An alternative for both the IXDP630/

631 is with an external clock signal.

Because of its flexibility, the IXDP630/

631 is easily utilized in a variety of

brushed DC, trapezoidally commutated

brushless DC, hybrid and variable

reluctance step and other more exotic

PWM motor drive power and control

circuit designs.

This 5 V HCMOS integrated circuit is

intended primarily for application in

three-phase, sinusoidally commutated

brushless motor, induction motor, AC

servomotor or UPS PWM modulator

control systems. It injects the required

deadtime to convert a single phase leg

PWM command into the two separate

logic signals required to drive the upper

and lower semiconductor switches in a

PWM inverter. It also provides facilities

for output disable and fast overcurrent

and fault condition shutdown.

Block Diagram IXDP 630/IXDP 631