1W audio power amplifier based on the LM4890LD chip

The LM4890LD chip can be extracted from the board of an LG B2000 cell phone. This is a ten-pin low-frequency amplifier chip with a power output of 1 W. Power supply from 3.3 to 5.5 V.

I soldered thin copper wires, which I took from a stranded wire, to the microcircuit. This was not easy. I soldered these wires to the SchmartBOARD

When a high level is applied to pin 1 of the microcircuit, the amplifier will be turned on. When a low level is applied, the amplifier will be turned off.