原标题：基于ST STWBC-WA digital controller的穿戴式装置的无线充电方案

　　身处物联网(IoT)时代,智能装置充满在我们的日常生活，穿戴式装置是消费电子快速成长的一环，加上手机的广泛使用,一起带动了无线充电的方便需求。ST的STWBC-WA无线充电器，简化设计和缩短您的产品上市时间，有效的电力传输，及确保最大安全性和可靠性。

　　场景应用图

　　产品实体图

　　展示板照片

　　方案方块图

　　核心技术优势

　　•直径20毫米的超紧凑线圈

　　•使传输功率根据实际负载条件与数字反馈发送装置以提高效率

　　•异物(FOD)的和主动存在检测功能;在充电区域检测到金属或磁性物体时停止功率传输增加安全性

　　•弹性设定调整线圈,支持从1到2.5 W不同的低功耗应用

　　•图形界面的系统行为监测

　　•完全参考设计(IC，韧体，GUI和接口工具)

　　•认证通过

　　方案规格

　　VIN range: 3 V to 5.5 V

　　– Supports USB VIN

　　• Active presence detector

　　• Parametric customization via graphicalinterface

　　• 2 firmware options:

　　– Turnkey solution for quick design

　　– APIs available for application customization

　　• Peripherals available via APIs

　　– ADC, with 10-bit precision

　　– UART

　　– I2C master fast/slow speed rate

　　– GPIOs: Flash and EEPROM with read-while-write (RWW) and Error Correction Code (ECC)

　　– Program memory: 32 Kbytes Flash; data retention:15 years at 85 °C after 10 kcycles at 25 °C

　　– Data memory: 1 Kbyte true data EEPROM; data retention: 15 years at 85 °C after 100 kcycles at 85 °C

　　– RAM: 6 Kbytes

　　– Operating temperature: -40 °C up to 105 °C

　　技术文档

　　【STWBC-WA】

　　Digital controller for wireless battery charger transmitters for wearable and smart watches applications

　　The STWBC-WA is STMicroelectronics’ wireless battery charger transmitter application optimized for wearable usage.

　　Thanks to its 5 V native supply, the STWBC-WA device is ideal to operate with USB power supplies.

　　Wireless battery charging systems replace the traditional power supply cable by means of electromagnetic induction between a transmitting pad or dongle (TX) and a battery-powered unit (RX), such as a smartwatch or sports gear.

　　The power transmitter unit is responsible for controlling the transmitting coil and generating the correct amount of power requested by the receiver unit. The receiver unit continuously provides the transmitter the correct power level requested, by modulating the transmitter carrier through controlled resistive or capacitive insertion. Generating the correct amount of power guarantees the highest level of end-to-end efficiency due to reduced energy waste. It also helps to maintain a lower operational temperature.

　　The digital wireless battery transmitter can adapt to the amount of energy transferred by the coil by modulating the frequency, duty cycles or coil input voltage.

　　主要特性

　　Digital controller for wireless battery charger transmitters

　　Optimized for < 3 W applications

　　Smartwatches and healthcare

　　Internet of Things (IoT) battery-powered smart devices

　　Remote controllers

　　Cost effective half-bridge topology with integrated drivers

　　Optional full-bridge configuration for 3 W applications

　　VIN range: 3 V to 5.5 V

　　Supports USB VIN

　　Active presence detector

　　Parametric customization via graphical interface

　　2 firmware options:

　　Turnkey solution for quick design

　　APIs available for application customization

　　Peripherals available via APIs

　　ADC, with 10-bit precision

　　UART

　　I2C master fast/slow speed rate

　　GPIOs

　　Memory

　　Flash and EEPROM with read-while-write (RWW) and Error Correction Code (ECC)

　　Program memory: 32 Kbytes Flash; data retention: 15 years at 85 °C after 10 kcycles at 25 °C

　　Data memory: 1 Kbyte true data EEPROM; data retention: 15 years at 85 °C after 100 kcycles at 85 °C

　　RAM: 6 Kbytes

　　Transmitter reference design:

　　Evaluation board order code: STEVAL-ISB038V1T

　　2-layer PCBs

　　Active object detection

　　Graphical user interface for application monitoring

　　Interoperable with receiver: STEVAL-ISB038V1R

　　Operating temperature

　　-40 °C up to 105 °C

　　Package

　　VFQFPN32