IR43x1

© 2013 International Rectifier

Description

The IR43x1 integrates PWM controller and digital audio MOSFETs forming a high performance Class D audio

amplifier. As a result of fully optimized MOSFETs co-packed with a dedicated controller IC, the IR43X1operates

without mechanical heatsink attached in a typical music playback usage. High voltage ratings and noise immunity

in the controller IC ensures reliable operation over various environmental conditions. A small 5x6 mm PQFN

package enhances the benefit of smaller size of Class D topology. The IR43x1 are a lead-free, ROHS compliant.

Typical Connection Diagram

1. Inverting Amplifier

-B

+B

Speaker

VB

VAA

VSS

IN+

IN-

COMP

CSD

COM

VN

VS

VP

VCC

CSH

GND

VCC

INPUT

2. Differential Amplifier

-B

+B

Speaker

VB

VAA

VSS

IN+

IN-

COMP

CSD

COM

VN

VS

VP

VCC

CSH

GND

VCC

IN-

IN+

April 22, 2013