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Reference design announced for USB-PD compliant fast chargers

Power Integrations and Cypress Semiconductor have announced a joint reference design describing a 20W, USB-PD compliant AC/DC power converter targeted at chargers for smart mobile devices. The design, titled DER-533, pairs the EZ-PD CCG2 USB Type-C port controller from Cypress with Power Integrations’ InnoSwitch-CP off-line CV/CC flyback switcher IC, enabling designers to produce a standards-compliant power adapter that is claimed to be fast, compact and energy-efficient.

Shyam Dujari, director of marketing for Power Integrations, said: “USB-PD will be the flexible power delivery vehicle for the next generation of mobile devices; it provides a unifying architecture for power and data within a slim, reversible and robust connector.”

Ganesh Subramaniam, senior director of the USB product line at Cypress, added: “Charger ubiquity and Type-C adoption will lead to USB-PD being implemented rapidly in power adapters for laptops, tablets and phones as the preferred technology choice for protocol-driven, fast-charging adapters.”

Cypress’ EZ-PD CCG2 USB Type-C port controller is said to comply with the latest USB Type-C and USB-PD standards and provides a complete solution for passive Electronically Marked Cable Assembly (EMCA) cables, active EMCA cables, notebooks, power adapters, monitors, docks and cable adapters. EZ-PD CCG2 reduces BOM by integrating a Type-C transceiver, termination resistors and system-level ESD.

By providing a constant power output, InnoSwitch-CP is claimed to allow battery-operated devices to draw up to the maximum power of the charger at any selected output voltage, optimising charge time and cost. InnoSwitch-CP ICs use Power Integrations’ FluxLink technology, eliminating the need for an optocoupler and enabling secondary-side control that delivers transient performance, CV/CC regulation and low no-load power consumption. It is also said to implement safe synchronous rectification, resulting in an efficient power supply.

DER-533 implements Profile 2 of the USB-PD standard and is capable of 5V/3A and 9V/2.2A of power delivery over a standard 3A USB Type-C cable.

Author
Tom Austin-Morgan

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