The TPA0211 is a 2-W mono bridge-tied-load (BTL) amplifier designed to drive speakers with as low as 4- impedance. The device is ideal for use in small wireless communicators, notebook PCs, PDAs, anyplace a mono speaker and stereo head phones are required. From a 5-V supply, the TPA0211 can delivery 2-W of power into a 4- speaker.