1.

General description

Zero dead time Class-D 7.5 A power comparator

The TDA8939 is a power comparator designed for use in a high efficiency class-D audio

power amplifier system.

It contains power switches, drive logic, protection circuitry, bias circuitry and a fully

differential input stage (comparator).

This device is optimized for applications in fully digital open-loop class-D audio systems

(in combination with a digital PWM controller).

The TDA8939 power comparator operates with high efficiency and low dissipation. The

system operates over a wide supply voltage range from

±10 V up to ±30 V.

2.

Features

±10 V to ±30 V (symmetrical) or 20 V to 60 V (asymmetrical)

3.

Applications

TDA8939

Zero dead time Class-D 7.5 A power comparator

Rev. 01 — 22 April 2004

Objective data sheet