Controller streamlines design of USB-C accessories and power adaptors

February 17, 2016 // By Paul Buckley
Cypress Semiconductor Corp., has introduced a USB-C controller with Power Delivery (PD) that streamlines the design of USB-C accessories, such as adapter dongles, power adapters and power banks.

The EZ-PD CCG3 controller claims to offer an unparalleled level of integration that minimizes bill-of-material costs and simplifies designs, replacing multiple
discrete components with a single-chip solution.

The EZ-PD CCG3 controller supports direct 3.3-V to 20-V operation. It integrates independent 20-V VBUS gate drivers for provider and consumer power paths, two 1-W VCONN Field-Effect Transistors (FETs) that provide power to USB-C cables, and a USB Billboard Controller that informs the USB host of supported Alternate Modes and failures. 20-V operation is enabled by the integration of a high-voltage regulator and analog blocks that protect systems against overvoltage and overcurrent conditions. The CCG3 controller includes an ARM Cortex-M0 processor, two 64 kB flash memory banks with read-while-write operation and an integrated Crypto Engine for fail-safe firmware updates with authentication. CCG3 also incorporates an analog switch for non-USB signals, such as DisplayPort control signals, along with four serial communication blocks, each of which can be configured to I2C, SPI or UART serial protocols.

The EZ-PD CCG3 controller includes support for legacy USB battery charging schemes, ensuring CCG3-based hosts and accessories are interoperable with legacy USB power providers and consumers. Integrated electrostatic discharge (ESD) protection circuits provide system-level protection up to 15 kV.

The USB Type-C standard is gaining rapid support with top-tier PC and electronics manufacturers by enabling slim industrial designs, easy-to-use connectors and cables, and the ability to transmit multiple protocols and deliver up to 100W of power. The USB Type-C standard’s 2.4-mm-high connector plug is smaller than current 4.5-mm USB Standard-A connector. In addition to the transport of USB signals, DisplayPort and Thunderbolt signals can be delivered over the same connector via the USB Type-C standard’s Alternate Mode capability.