The TDA2050 is a Hi-Fi Audio Amplifier IC from ST Microelectronics with a maximum output power of 32W. It has a high operating voltage of 50V compared to the other TDAxxxx series amplifier ICS.
The TDA2003 is an Audio Amplifier IC from ST Microelectronics with a maximum output power of 10W commonly used in stereo amplification in car Radio. The IC can output a maximum current of 3.5A and features very low harmonic and crossover distortion.
TDA7265 is a 25 Watt + 25 Watt stereo audio amplifier IC. The chip is a class AB dual audio power amplifier in Multiwatt package specifically designed for high quality sound application as music centers and stereo TV sets.