ST STWLC04+ STWBC－WA 1W无线充电系统解决方案

ST公司的STEVAL-ISB038V1是采用发送器STWBC-WA和接收器STWLC04的1W可穿戴无线电源系统.发送器20mm线圈,接收器11mm线圈,无线功率传输1W,主要用在超紧凑的电池工作的设备如智能手表,无联网(IoT)传感器和医疗设备.本文介绍了无线充电系统架构图,1W可穿戴无线电源系统STEVAL-ISB038V主要特性和电路图,材料清单以及发送器STWBC-WA和接收器STWLC04主要特性和框图.
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 due to reduced energy waste. Italso helps to maintain a lower operational temperature.
The digital wireless battery transmitter can adapt to the amount of energy transferred by thecoil by modulating the frequency, duty cycles or coil input voltage.
STWBC-WA主要特性:

 Digital controller for wireless battery chargertransmitters
 Optimized for < 3 W applications
– Smartwatches and healthcare
– Internet of Things (IoT) battery-poweredsmart devices
– Remote controllers
 Cost effective half-bridge topology withintegrated drivers
 Optional full-bridge configuration for 3 Wapplications
 VIN range: 3 V to 5.5 V
– Supports USB VIN
 Active presence detector
 Parametric cu...