BUY BD7820 https://www.utsource.net/itm/p/1467431.html
1.1W to1.5W Monaural Speaker Amplifiers
Description: The BD7820 is a P-channel MOSFET with a maximum drain-source voltage of 20V and a maximum drain current of 5.5A. Features: - Low on-resistance - Low gate charge - High speed switching - High input impedance Applications: - DC/DC converters - Load switching - Battery protection circuits - Motor control circuits (For reference only)