The dual-mode receiver works with the AirFuel and Wireless Power Consortium (WPC) Qi 1.2 and PMA-SR1 inductive wireless communication protocols, allowing you to quickly start charging mobile devices regardless of the protocol.
The ST STWLC33 inductive wireless power receiver greatly simplifies the deployment of dual-function handheld devices and delivers an enhanced user experience, faster wireless charging, and outstanding overall system efficiency compared to other solutions. The STWLC33 is also ST's only 15W receiver capable of acting as a 3W transmitter, using the same coil to power another receiver. Users can wirelessly charge one device and simultaneously use that same device to charge another. Furthermore, the STWLC33 is one of the first wireless receivers on the market capable of providing an output voltage sufficient to charge two-cell lithium-ion batteries.
At the heart of the STWLC33 is a 32-bit, 32 MHz Arm® Cortex®-M microcontroller with 32 KB of firmware/ROM and 8 KB of RAM. The device offers up to 80 percent overall system efficiency and low power dissipation through features such as its integrated low-impedance synchronous rectifier and low-dropout linear regulator.
The STWLC33 offers proprietary features that enhance the user experience, including active presence detection to quickly reactivate the system when a compatible object is presented for charging, and special functionality to improve foreign object detection (FOD) performance by cutting power and preventing overheating. Other features include a 32 MHz PWM timer, an eight-channel analog-to-digital converter (ADC), and configurable general-purpose inputs and outputs (GPIOs).
The STWLC33 inductive wireless power receiver is ideal for very compact wireless applications, including tablets, power banks, phones, medical equipment, and wearable devices. Designers can also combine the STWLC33 receiver with the STWBC-EP wireless charge controller transmitter to complete their high-speed rechargeable devices. The STWLC33 is compatible with the STEVAL-ISB042V1 evaluation board, which includes STWLC firmware that allows engineers to modify parameters and settings to ensure proper integration of the STWLC33 power receiver into the final application.
