TI Unveils Filter-Free Class-D Audio Amplifier with DC Volume Control

9/19/2003 - Advancing its portfolio of Filter-Free Class-D audio power amplifiers for LCD flat panel display, LCD projection and powered speaker manufacturers, Texas Instruments Incorporated (TI) (NYSE:TXN) introduced the industry´s first 5-V Filter-Free Class-D audio power amplifier with integrated DC volume control, cutting costs and time for designers.

The gain of the TPA2008D2, which affects the output power level, is controlled by a DC voltage applied to the VOLUME pin. At full power the TPA2008D2 will drive 6 W (3 W x 2) into 3-ohm speakers with no external heat sink-ideal for popular 15" to 17" LCD TVs and multi-function monitors.

Eliminating the external heat sink is made possible from its high efficiency of over 80 percent. The efficiency reduces heat in the system and reduces current requirements from the power supply. The device's lower heat and current requirements are complimented by its superior sound quality. Half power total harmonic distortion plus noise (THD+N) is a mere 0.045% at 1kHz and the noise floor is a benchmark for Class-D amplifiers at -80 dBV. The low THD+N and noise floor help insure a clean, pure signal is heard at the speaker.

Available Today
The TPA2008D2 Class-D audio amplifiers are available now from Texas Instruments and its authorized distributors. The TPA2008D2 comes in a standard PowerPADTM surface mount 24-pin thin scale small outline package (TSSOP). Suggested resale pricing in quantities of 1,000 start at $1.80.

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