ST公司的STWBC-WA是用于智能手表和可穿戴的无线充电发送器的数字控制器,最佳控制功率小于3W, VIN范围3V-5.5V,支持USB VIN.功率发送器单元负责控制发送线圈和产生接收单元所要求的正确功率.本文介绍了STWBC-WA主要特性和框图,无线充电架构图,发送器-接收器测试建立图,无线充电器发送评估板STEVAL-ISB038V1T主要特性和电指标,电路图,材料清单和PCB设计图.
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 powersupplies.
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-poweredunit (RX), such as a smartwatch or sports gear.
The power transmitter unit is responsible for controlling the transmitting coil and generatingthe correct amount of power requested by the receiver unit. The receiver unit continuouslyprovides the transmitter the correct power level requested, by modulating the transmittercarrier through controlled resistive or capacitive insertion. Generating the correct amount ofpower guarantees the highest level of end-to-end efficiency du