USB PD 3.0 provides a number of key enhancements over the current version of the spec, USB PD 2.0 improving the robustness of power sources, sinks and cables.
Cypress’s EZ-PD CCG3 and CCG4 USB-C port controllers are believed to be the first solutions to support the USB PD 3.0 specification from the USB Implementers Forum (USB-IF).
USB PD 3.0 provides the ability for an accessory to change modes from sourcing to sinking power quickly, preventing data corruption during a sudden disconnect of its power source. This feature, called fast role swap, enables charge-through dongles and docks.
USB PD 3.0 also introduces an extended messaging capability that enables faster USB PD performance for firmware updates and offers a more-efficient mechanism to exchange security certificates. The extended messages can carry data payloads of up to 260 bytes, more than nine times the 28 bytes allowed in USB PD 2.0.USB PD 3.0 is fully backward-compatible with USB PD 2.0.
Cypress’s portfolio of programmable USB-C controllers with PD 3.0 support includes the EZ-PD CCG3, an integrated USB-C solution with authentication, and the CCG4, a two-port USB-C solution. The EZ-USB HX3C and EZ-PD CCG2 will also be adding PD 3.0 support via a firmware upgrade later in the year.