TDA2050 amplifier circuit used in the same pcb but if you want you can use the LM1875 or TDA2030A integrate these different legs of the same power connections. lm1875 a maximum of 20 watts and 18 watts in 2030... Electronics Projects, TDA2050 32W amp (LM1875 TDA2030A pcb compatible) "audio amplifier circuits, ic amplifier, " Date 2019/08/01