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.
|DS11797: Digital controller for wireless battery charger transmitters for wearable and smartwatch applications||1.0||787 KB|
|STWBC-WA - Wireless power for IoT devices||06.2018||1 MB|
|Brochure Power management guide||09.2017||3 MB|
|STSW-ISB038TFW||ST||Firmware for STEVAL-ISB038V1T wearable wireless power transmitter evaluation board based on STBWC-WA|
|STSW-ISB045FW||ST||Firmware for the STEVAL-ISB045V1 wireless charger transmitter evaluation kit based on STWBC-WA|
|STSW-STWBCFWDT||ST||STWBC firmware downloader tool|
|STSW-STWBCGUI||ST||Graphical user interface for wireless power transmitter evaluation boards based on the STWBC chip family|
|STEVAL-ISB045V1||ST||2.5 W wireless charger transmitter evaluation kit|
|Part Number||Marketing Status||Package||Grade||ECCN (EU)||ECCN (US)||Unit Price (US$) *||Quantity||Country of Origin||Operating Temperature (°C) (max)||Operating Temperature (°C) (min)||Output Power (W) (typ)||More info||Order from ST||Order from Distributors|
|STWBC-WATR||Active : Product is in volume production||VFQFPN 32 5x5x1.0||Industrial||NEC||3A991A2||2.825||1000||PHILIPPINES||105||-40||2.5||MORE INFO||No availability reported, please contact our Sales office|
|STWBC-WA||Active : Product is in volume production||VFQFPN 32 5x5x1.0||Industrial||NEC||3A991A2||2.825||1000||PHILIPPINES||105||-40||2.5||MORE INFO||Get Sample Add to cart||DISTRIBUTOR AVAILABILITY|
|Part Number||Marketing Status||Package||Grade||RoHS Compliance Grade||Material Declaration**|
|STWBC-WATR||Active||VFQFPN 32 5x5x1.0||Industrial||Ecopack2|
|STWBC-WA||Active||VFQFPN 32 5x5x1.0||Industrial||Ecopack2|
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.