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:
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RL78/G1C Compact, Low Power Microcontrollers Supporting USB Communications and Rapid Charging
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RL78 Low Power 8 & 16-bit MCUs, MCU / MPU Selection Table | Buy / Sample |
P9222-R Wireless Power Receiver for Low Power Applications
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Wireless Power Receivers, Magnetic Induction | Buy / Sample |
DA14531 SmartBond™ Ultra-Low Power Bluetooth® 5.1 System-on-Chip
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Bluetooth® Low Energy | Buy / Sample |
ISL9123 Ultra-Low IQ Buck Regulator with Bypass
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Buck Regulators (Integrated FETs) | Buy / Sample |
SLG46108 GreenPAK™ Programmable Mixed-Signal Matrix
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Other GreenPAKs | Buy / Sample |
DA9168 1-Cell, 1.5A Battery Charger PMIC with 20mA Termination, Ultra-Low IQ Reverse Boost, and I2C
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Single-Cell Battery Charging | Buy / Sample |
SLG59H1401C High Voltage GreenFET Load Switch
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Load Switches | Buy / Sample |
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True Wireless Stereo (TWS) Earbud Charger Cradle | Blog Post | May 21, 2022 |