MT5785

MT5785 is a System on Chip (SoC) for magnetic induction based wireless power receiver.

It is fully compliant with WPC Qi specification (Version 1.3) 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 100W of delivered power with fully programmable output voltage (maximum 20V).

MT5785 has a very high overall AC to DC conversion efficiency (up to 98.5%), thanks to the optimized and adaptive full synchronous rectifier control, very small RDSON of power MOSFET, and extremely low bias current are achieved.

With the exception of a few external passive components, the chip integrates everything that is needed for a wireless power receiving function. It is composed of an ARM Cortex M0 processor with 32KB MTP, full synchronous rectifier and special power LDO, robust and reliable over-voltage, over-current and over-temperature protection circuits, bi-directional communication unit and various GPIO’s and serial interfaces.

• Power delivery: up to 100W

• Power delivery in Tx mode: up to 18W

• Fully programmable output voltage (up to 20V)

• Embedded with ARM Cortex M0 processor with 8KB SRAM and 32KB MTP

• AC input to DC output efficiency: up to 98.5%

• Rectifier bridge supports full-wave mode and half-wave mode

• Reverse charging mode with integrated dual-channel Tx demodulation

• Integrated with Q-Detection

• Reliable and unique over-voltage, current, temperature protection

• Specially designed power LDO with output clamping and fast response to line and load transient

• WPC compliant and proprietary communication protocols support with hardware ASK and FSK modulation and demodulation

• Independent I2C slave and I2C master interface with additional GPIO’s

• Halogen free and RoHS compliant

• 4.63 mm x 4.79 mm (11 x 11 ball array) 118-WLCSP