STMicroelectronics (ST for short) launched a 100W wireless charging receiver chip, which is the wireless charging receiving chip with the highest rated power in the industry, and is aimed at the fastest wireless charging in the current market. A high-end smartphone with the largest battery capacity can be fully charged in less than 30 minutes using STMicroelectronics’ new chip STWLC99.
According to STMicroelectronics, the unprecedented power handling capability of the chip will change the development prospects of battery-powered equipment such as industrial tools, medical monitoring, drug pumps, mobile robots, and drones, extending the battery life of the equipment and shortening the charging time.
In addition to improving user convenience, high-power wireless charging technology can also allow designers to create industrial equipment without power sockets and power cords, bringing various benefits to end users. Eliminating the charging socket saves board space and enhances the device’s water or dust seal for easy operation in challenging environments.
Wireless charging technology can avoid the annoying wire tangling problem. Independent mobile devices such as robots and drones can be easily charged without the need for machines or humans to connect charging cables.
The STWLC99 is packaged in a 4.859m x 4.859mm wafer-level chip package (WLCSP) and is available in volume production starting at $2.50.
STMicroelectronics releases 100W wireless charging receiver chip STWLC99: large battery phones can be fully charged in less than 30 minutes
Technical details:
The STWLC99’s energy-efficient architecture consists of a synchronous rectifier with low RDS(on) MOSFETs and a low-dropout voltage regulator, delivering energy received by the charger to the battery while minimizing losses and dissipating power.
The new products are Qi 1.2.4 and 1.3 compliant, support the Qi Extended Power Profile (EPP), and feature ST’s specially optimized STSuperCharge (STSC) fast-charging protocol. When paired with STMicroelectronics’ STWBC2-HP transmitter solution, the receiver chip can achieve up to 100W of charging power.
STWLC99 uses on-chip non-volatile memory to save configuration parameters, and exchanges configuration data and charging control commands through the I2C interface. A full set of safety protection functions are built into the chip, including current sensing, accurate foreign object detection, transmission mode Q-factor detection, and over-current, over-voltage, and over-temperature protections.
STWLC99 can also be used as a charging transmitter to charge other devices with a maximum power of 25W.
