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TDA8939 Datasheet

  • TDA8939

  • Zero dead time Class-D 7.5 A power comparator

  • 99.40KB

  • PHILIPS

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TDA8939
Zero dead time Class-D 7.5 A power comparator
Rev. 01 鈥?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 ef铿乧iency class-D audio
power ampli铿乪r 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 ef铿乧iency and low dissipation. The
system operates over a wide supply voltage range from
卤10
V up to
卤30
V.
2. Features
s
s
s
s
s
s
s
s
s
Zero dead time switching
Maximum output current 7.5 A
Standby mode
High ef铿乧iency
Operating voltage from
卤10
V to
卤30
V (symmetrical) or 20 V to 60 V (asymmetrical)
Low quiescent current
High output power
Diagnostic output
Thermal protection, current protection and voltage protection.
3. Applications
s
s
s
s
s
Television sets
Home-sound sets
Multimedia systems
All mains fed audio systems
Car audio (boosters).

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