2.0 active built-in sound card, one-line communication with small box, laptop speaker, line controlled power amplifier scheme

XS9971 5V power supply 3W power amplifier wire control board

Xs9971 pin can be compatible with ltk5128d Haa2018, ns4165b, xpt8871, mix2018a, etc. are more cost-effective

This scheme is divided into a single channel power amplifier with two speakers scheme and two power amplifiers with two speakers scheme


he PCBA has a built-in USB sound card and dual channel class D power amplifier, which can be directly connected to the computer with a USB cable, and realize the functions of power supply and sound decoding (no need to connect the audio cable). The circuit is simple, easy to use and excellent sound quality. It is a good choice for the upgrading and upgrading of ordinary wire controlled power amplifier


The power amplifier IC adopts xs9971, the maximum power can reach 5W + 5W, and the built-in sound card adopts USB2 0 Class V1. 0 USB audio decoder, which supports up to 48Khz sampling rate and can realize audio playback with high sound quality.



The interfaces are (from top to bottom): USB input (5V), left and right channel output, power indicator (optional)



Product example diagram