1. Brief Introduction

TWS is short for True Wireless Stereo. TWS earphones do not have the traditional physical wire, the left and right two earphones through the Bluetooth to form a stereo system. The earphones are powered by lithium batteries, which need to be placed in the charging compartment for charging after a period of wear. Therefore, the charging compartment needs a solution that can manage the charging process between the external power supply, the charging compartment battery and the headphone battery.

▲ GD32E230G-TWS Board

2. Function Description

The GD32E230G-TWS board is a power management development platform that uses the GigaDevice GD32E230G8U6 chip with Cortex®-M23 core as the main control MCU and communicates with the power management chip PMU (GD30WS8805) via I2C interface to complete the charge and discharge management of a single lithium battery. The platform uses Micro USB to provide charging power for the system. In addition, peripheral resources such as GD-Link, SWD, UART and Reset are also provided. This document provides detailed hardware schematics and related applications.

▲ System Block Diagram

3. Main Features

• Single Li-ion battery charging via Micro USB

• Enables Li-ion battery to charge earphones via Boost function

• Enables MCU to communicate with earphones

• PMU internal LDO output 3.3V for MCU power supply

• LED lithium battery power real-time monitoring indication

• NTC battery temperature protection

• Complete software resources, with a dedicated firmware library

4. Development Resources

GigaDevice can provide evaluation kits, user guides, hardware schematics, software code and other complete development materials. Please contact your local GigaDevice sales office or authorized representative for more details.

5. Typical Applications

Wireless earphone charging compartment, battery charging module, etc.