NXP Semiconductors TDA8939
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).| Part No. | TDA8939 |
|---|---|
| Datasheet | TDA8939 Download |
| Manufacturer |  NXP Semiconductors |
| Description | Zero dead time Class-D 7.5 A power comparator |
| Buy | Stock & Price |
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 efficiency Prated [1] Min ±10 20 - Typ ±25 50 50 Max ±30 60 70 Unit V V mA η [1] - 90 - % When the supply voltage is below ±12.5 V the PWM outputs will not be able to switch to the high side at the first PWM cycle. 5.
