IC controls power delivery over USB Type-C connector

September 18, 2015 // By Graham Prophet
Rohm Semiconductor has developed power receiver controller ICs compatible with the latest USB Power Delivery (Rev2.0) and Type-C (Rev1.1) standards. The BM92TxxMWV series supports conventional USB power supply up to 7.5W, and the newly expanded power range up to 100W (20V/5A) for USB Type-C connected devices.

The increased power will make it possible to drive equipment with larger power requirements such as TVs and PCs via USB and at the same time enable conventional USB-equipped portable devices (i.e. smart phones, tablets) to be charged up to four times faster than the previous standard.

Rohm has used its BiCDMOS processes and circuit technologies to develop USB PD controller ICs optimised for these latest USB standards.

With the new Power Deliver standard, optimum power delivery is enabled in both directions between USB Type-C connected systems through a power contract that determines the Provider (Supply) and Consumer (Receiver) devices. This achieves maximum efficiency, since the Consumer only requests the required amount of power and the Provider only supplies the power available. Additional advantages include multiple scalable power delivery modes, from 7.5W (5V@1.5A) up to 100W (20V@5A), making it possible to drive larger electronic equipment such as TVs and laptops while enabling existing USB-equipped battery-driven devices to be charged over 4x faster than the previous standard.

Support for DisplayPort Alternate Mode is also provided for carrying video signals over USB, eliminating the need for dedicated video cables. The capability to deliver high-speed data, video, and an unprecedented amount of power over a single cable represents a breakthrough achievement that is expected to improve convenience while significantly reduce clutter and waste.

0.13 µm BiCDMOS processes and circuit technology are utilised to assist in eliminating the FET and separate power supply for power receiving operation. Compared to standard systems, the number of external parts can be reduced by more than 20 (including the external power supply IC).

ROHM Semiconductor www.rohm.com/eu