TDA8939 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

TDA8939

Zero dead time Class-D 7.5 A power comparator

Philips Electronics 

TDA8939

Zero dead time Class-D 7.5 A power comparator

Rev. 01 — 22 April 2004

Objective data sheet

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

s Zero dead time switching

s Maximum output current 7.5 A

s Standby mode

s High efficiency

s Operating voltage from ±10 V to ±30 V (symmetrical) or 20 V to 60 V (asymmetrical)

s Low quiescent current

s High output power

s Diagnostic output

s Thermal protection, current protection and voltage protection.

3. Applications

s Television sets

s Home-sound sets

s Multimedia systems

s All mains fed audio systems

s Car audio (boosters).

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