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​




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

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4:3 ratio Sheet.220 Sheet.1 Sheet.2 Sheet.3 Sheet.4 EU089 EU089 EU089 Inductor Iron Core Line.841 Inductor Air Core.212 Sheet.17 Sheet.18 Sheet.19 Sheet.20 Sheet.21 Sheet.22 Sheet.23 Sheet.24 Sheet.25 Line.29 Inductor Iron Core.27 Line.841 Inductor Air Core.212 Sheet.30 Sheet.31 Sheet.32 Sheet.33 Sheet.34 Sheet.35 Sheet.36 Sheet.37 Sheet.38 Line.29 Shunt Sheet.61 Sheet.62 Sheet.63 Sheet.65 Sheet.66 Sheet.67 Sheet.69 Sheet.76 Label Text 10pt.254 + + Label Text 10pt.255 - - Sheet.79 Line 1pt.1552 Line 1pt.1583 Sheet.82 Sheet.109 Sheet.110 Darlington.111 Sheet.112 Sheet.113 Darlington.254 Sheet.115 Sheet.116 Darlington.254 Sheet.118 Sheet.119 Sheet.120 Non-Electric Cap Sheet.135 Sheet.136 Sheet.137 Sheet.138 Sheet.139 USB-C USB-C USB-C USB-C Sheet.142 Sheet.143 Sheet.144 Sheet.145 Sheet.146 Sheet.147 Sheet.148 Sheet.149 Sheet.150 Sheet.151 Sheet.152 Sheet.153 Sheet.154 Inductor Coreless (Air conductor) Sheet.170 Sheet.171 Sheet.172 Sheet.173 Sheet.174 Sheet.175 Sheet.176 Sheet.177 Sheet.178 USB2 Sheet.182 DP/DM DP/DM DP/DM Sheet.187 Sheet.188 Sheet.189 Sheet.190 VBUS VBUS VBUS Sheet.192 5V (5W) 5V (5W) 5V (5W) Optional Optional Optional Sheet.195 Sheet.196 Sheet.197 Sheet.198 Sheet.199 Sheet.201 Sheet.202 Sheet.203 Sheet.204 Sheet.207 Sheet.208 Sheet.211 Sheet.212 Sheet.213 Connector 1 Sheet.215 Sheet.216 Connector 1.217 Sheet.219 Sheet.221 Sheet.229 Sheet.230 Sheet.231 Wakeup Wakeup Wakeup Sheet.233 Sheet.234 Sheet.235 Sheet.236 Sheet.237 Sheet.238 Sheet.239 Sheet.240 Sheet.241 Sheet.243 Sheet.85 Sheet.86 Sheet.242 VBAT VBAT VBAT Sheet.253 Sheet.254 Sheet.256 Sheet.257 Sheet.258 Sheet.259 Sheet.260 Sheet.261 Sheet.262 Sheet.263 Connector 1.264 Sheet.265 RX/TX RX/TX RX/TX Vsys/VBAT Vsys/ VBAT Vsys/VBAT Ch1/2 Ch1/2 Ch1/2 Earbuds Earbuds Earbuds Connector 1.270 Connector 1.271 Optional Optional Optional Sheet.273 Sheet.274 Connector 1.275 Sheet.277 Sheet.278 Darlington.131 Sheet.280 Sheet.281 Darlington.254 Sheet.283 Sheet.284 Darlington.254 Sheet.287 Sheet.288 Darlington.289 Sheet.290 Sheet.291 Darlington.254 Sheet.293 Sheet.294 Darlington.254 Sheet.297 Sheet.298 Darlington.299 Sheet.300 Sheet.301 Darlington.254 Sheet.303 Sheet.304 Darlington.254 DP/DM.306 USB2 USB2 MCU 16bit MCU 16bit MCU 16bit MCU 16bit USB2.0 BC1.2 USB2.0 BC1.2 USB2.0 BC1.2 GPIOs GPIOs GPIOs I2C Master I2C Master I2C Master GPIOs GPIOs GPIOs ADC ADC ADC UART UART UART Charger PMIC wth Boost + LDO Charger PMIC with Boost + 2x LDO Charger PMIC with Boost + 2x LDO Charger PMIC with Boost + 2x LDO Vsys Vsys Vsys I2C I2C I2C RIN/N RIN/N RIN/N Boost Boost Boost LDO LDO LDO LDO LDO LDO Buck Charger Buck Charger Buck Charger Vin Vin Vin Dual Input Single Output Mux Dual Input Single Output Mux Dual Input Single Output Mux Bluetooth Low Energy Bluetooth Low Energy Bluetooth Low Energy DC/DC Buck DC/DC Buck DC/DC Buck DC-PLC DC-PLC DC-PLC Wireless Power RX Wireless Power RX (WPC/Qi) Wireless Power RX (WPC/Qi) Wireless Power RX (WPC/Qi) I2C I2C I2C
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