Preliminary Data Sheet

IXA531

First Release

Copyright © IXYS CORPORATION 2005

500mA 3-Phase Bridge Driver

Applications

• Driving MOSFETs and IGBTs in half-bridge circuits

• High voltage, high side and low side drivers

• Motor Controls

• Switch Mode Power Supplies (SMPS)

• DC to DC Converters

• Class D Switching Amplifiers

Warning: The IXA531 is ESD sensitive.

DS99187A(12/05)

Features

• Tolerant of negative transient voltages

• dV/dt immune (50V/ns)

• Latch-up protected over entire operating range

• Fault-current shutdown for all drive outputs

• User selectable delay or latching function for

clearing of the FAULT signal, independent

user controlled clearing of the FAULT signal

is also available

• UVLO protection for all drive outputs

• Enable signal capable of disabling all driver outputs

• 3 half-bridge driver pairs (independent)

• 3.3V logic compatible

• Cross-conduction prevention logic,

220 ns - 360ns Phase leg deadtime

• Peak output current: 600mA Pull-up/Source,

600mA Pull-down/Sink

• Wide operating supply voltage range: 8.0V to 35V

• Capacitive load drive capability: 1250pF in < 100ns

• Matched, low propagation delay times

• Low supply current

• Monolithic construction

___

• Fault monitoring is accompanied by a FLT

signal indication, with programmable reset or user

selectable latched protection

• Target package power dissipation capability is 2.0W.

• Full level of function available from -55°C to + 125°C

package and 44-Lead PLCC package

General Description

The IXA531 is a monolithic, 3-phase, MOSFET/IGBT

gate driver consisting of three independent, high and low

side output channels. In addition to the six inputs,

which are CMOS/TTL Compatible, for the three

corresponding high side and three low side outputs,

there are dedicated lines for FAULT, ENABLE and

RESET. Overload/Short Circuit protection is

implemented by sensing a voltage across a shunt or low

value resistor which carries load current. Upon

Overload/Short Circuit detection, all outputs are

disabled. Likewise ENABLE (EN) pin, when LOW under

abnormal operating conditions, affords soft shut down of

outputs. FAULT(FLT) signal‘s status indicates that shut

down has occurred either due to Overload/Short Circuit

in driven MOSFET/IGBT or Under Voltage on V

CL.

Clearing of FAULT (FLT) signal and restoration of

normal operation ensue automatically after a

programmed delay using an RC Network wired at RST

(RESET) pin. Matched propagation delays ensure

proper operation even at very high switching

frequencies. Absence of cross conduction in output

stages removes possibility of shoot through in driven

power MOSFETs or IGBTs.

Part

Package

IXA531S10

48L - SSLGA

IXA531L4

44L - PLCC

Ordering Information

1