View ba5210fs datasheet:

Audio ICs Speaker / headphone switch power amplifier BA5210FS The BA5210FS is a power amplifier with a built-in monaural speaker/stereo headphone switch. The speaker drive is BTL for large output, and when the headphones are connected, the “center-amp” design means that coupling is not re- quired. This significantly reduces the number of external components required, and makes this IC ideal for compact sets that have high component density. Mute and standby functions are provided, and direct microprocessor control is pos- sible. FApplications Notebook computers, electronic books, portable CD players, video cameras with built-in monitors, LCD TVs, radios, and electronic instruments FFeatures 1) Built-in BTL/stereo switch circuit. 4) Few external components required. 2) Mute f