Overview
Description
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
Comparison
Applications
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Blog Post
May 21, 2022
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