The MT5728 is a SoC (System on Chip) for magnetic induction based wireless power receiver.
It is fully compliant with the latest WPC Qi specification (Version 1.2.4) of BPP (Baseline Power Profile) and EPP (Extended Power Profile) and also supports various proprietary fast charging protocols used by major smart phone OEM’s. It is capable of true fast wireless charging for up to 30W of delivered power with fully programmable output voltage (maximum 20V) and current limit (maximum 2A).
MT5728 has a very high overall AC to DC conversion efficiency (up to 97%), thanks to the optimized and adaptive full synchronous rectifier control, very small Rdson of power MOSFET’s, and extremely low bias current.
With the exception of a few external passive components, this SoC integrates everything that is needed for a wireless power receiving function. It is composed of an ARM Cortex M0 processor with 8KB SRAM and 16KB MTP, full synchronous rectifier and special output LDO, robust and reliable over voltage, over current and over temperature protection circuits, bi-directional communication unit and various GPIO’s and serial interfaces.
With the flexibility of SoC architecture and the unique implementation, the MT5728 is future proof in supporting WPC Qi specification’s further updates and new proprietary protocols. It also supports reverse charging mode where a wireless power receiver is configured into a wireless power transmitter by firmware control.