Full-watt audio amps

TI's new CMOS audio amplifiers can deliver 1W of continuous average power into an 8-ohm load from a 5-V supply.

The TPA4860 and TPA4861 are well-suited for notebook computers, cellular phones and other hand-held audio systems.

A benefit for battery-powered applications is a low typical supply current of 3.5 mA at 5 V -- 50 percent lower than the nearest competitor.

Critical specifications for total harmonic distortion and noise (THD+N) and AC power supply rejection (PSRR) have been upgraded to minimize noise in the amplified signal.

Other features include a shutdown function for power-sensitive applications, internal thermal and short circuit protection, and headphone interface logic circuitry (TPA4860 only). A bridged tied load (BTL) configuration helps TPA486x audio amps eliminate large output coupling capacitors and quadruples the available output power of single-ended solutions with less board space required.

TPA4860 16-pin SOIC $1.24

TPA4861 8-pin SOIC $1.19

Suggested retail pricing in U.S. dollars in 1K quantity.