728558X is a integrated circuit power amplifier module (IC) manufactured by STMicroelectronics. The IC features a high output power of up to 14W, over a wide frequency range of 20Hz to 20kHz. It has a supply voltage of 7 to 26V and an operating current of 500mA. It also offers high noise immunity and short circuit protection. The 728558X is an ideal solution for applications such as audio amplifiers, public address systems, speaker systems, and more.