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 descripti...
Description
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 s s s s s s s s 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.
3. Applications
s s s s s Television sets Home-sound sets Multimedia systems All mains fed audio systems Car audio (boosters).
Philips Semiconductors
TDA8939
Zero dead time Class-D 7.5 A power comparator
4. Quick reference data
Table 1: Quick reference data VP = ±25 V; fcarrier = 384 kHz. Symbol VP Parameter supply voltage Conditions symmetrical supply voltage asymmetrical supply voltage Iq(tot) total quiescent current no load connected; no filters; no snubbers connected effi...
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