True Wireless Stereo (TWS) Earbud Charger Cradle

This True Wireless Stereo (TWS) and hearing aid earbud charger cradle/box design integrates USB-C, USB-A, and wireless power input paths with an optimized charger power management IC (PMIC). The PMIC combines a DC/DC buck charger, reverse boost function, and two LDOs to provide individually controlled voltage levels to the earbuds. Optional UART-based power line communication (PLC) enables charging voltage control and communication of SoC/SoH information.

System Benefits​:

• Highly integrated design requiring minimal discrete components
• USB BC 1.2 support for enhanced compatibility
• PLC reduces the number of pins between the cradle and earbuds
• Supports up to 2A battery charging capability
• Reverse boost function with up to 700mA output
• Charger PMIC with ultra-low 0.1µA leakage in ship mode
• Optional Bluetooth^® Low Energy connectivity for added functionality