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.

FEATUREs
■Zero dead time switching
■Maximum output current 7.5 A
■Standby mode
■High efficiency
■Operating voltage from±10 V to±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.

APPLICATIONs
■Television sets
■Home-sound sets
■Multimedia systems
■All mains fed audio systems
■Car audio (boosters).