For mono output amplifier application, TDA7056 IC can be your option.
Compact but powerful, this integrated circuit is contained in a 9 pin
medium power package. This device is designed for battery fed portable
equipments such as mono recorders, radios and television. To attract the
market, TDA7056 has many features such as low power consumption. For
more reliable operation, TDA7056 also has short circuit proof and ESD
(Electro Static Discharge) protected on all pins. Designing application
with this IC should be easy since no external components is needed. To
make sure you’ll love this chip, this device also has no switch on/off
clicks. Overall, TDA7056 has good stability.
TDA7056 3W BTL Mono Audio Power Amplifier Circuit Diagram