TDA8939TH Datasheet, PDF (1/21 Pages) NXP Semiconductors – Zero dead time Class-D 7.5 A power comparator

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).