True Wireless Stereo (TWS) Earbud Charger Cradle

This True Wireless Stereo (TWS) and hearing aid earbud charger cradle/box solution integrates USB-C, legacy USB-A and wireless power inputs paths with a highly optimized TWS charger power management IC (PMIC).

The charger PMIC combines a DC/DC buck charger with a reverse boost function and two separately controlled LDOs to provide individually controlled voltage levels to the earbuds. The solution also offers optional UART-based power line communication (PLC) to control the required charging voltage and communicate SoC/SoH information and more.

System Benefits​:

• Highly integrated solution requiring a minimal number of discrete components
• USB BC1.2 support
• PLC reduces the number of pins between cradle and earbud
• Up to 2A battery charging capability
• Reverse boost with up to 700mA
• Charger PMIC with 0.1µA leakage in ship mode
• Optional Bluetooth^® Low Energy connectivity​

Target Applications:

• True Wireless Stereo (TWS) charger cradles
• Hearing aid charger cradles
• Wearable and remote sensor charger cradles