MT5785

Description

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) and current limit (maximum 6A).

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.

With the flexibility of SoC architecture and the unique implementation, MT5785 is future proof in supporting WPC Qi specification’s further updates and new proprietary protocols. It also supports reverse charging mode where the wireless power receiver can be configured to a wireless power transmitter by firmware control.

 

Features

  • Power delivery: up to 100W
  • Power delivery in Tx mode: up to 18W
  • Fully programmable output voltage (up to 20V) and current limit (up to 6A)
  • Embedded with ARM Cortex M0 processor with 8KB SRAM and 32KB MTP
  • AC input to DC output efficiency: up to 98.5%
  • Reverse charging mode with integrated dual-channel Tx demodulation
  • Integrated 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
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