In collaboration with Cypress Semiconductor Corp., Power Integrations has readied a reference design for a 20-watt, USB-PD compliant AC/DC power converter aimed at chargers for smart mobile devices. The design, titled DER-533, combines Cypress’s EZ-PD CCG2 USB type-C port controller with Power Integrations’s InnoSwitch-CP off-line CV/CC flyback switcher IC. The design produces a standards-compliant power adapter that is fast, compact and highly energy-efficient. The rated efficiency is 85 percent.
In compliance with the latest USB type-C and USB-PD standards, Cypress’s EZ-PD CCG2 controller provides a complete solution for passive electronically marked cable assembly (EMCA) cables, active EMCA cables, notebooks, power adapters, monitors, docks and cable adapters (dongles). Plus it reduces bill of materials (BOM) cost by integrating a type-C transceiver, termination resistors and system-level ESD.
To optimize charge time and cost, Power Integrations’s InnoSwitch-CP provides a constant power output at any selected output voltage. For that, it employs the company’s proprietary FluxLink technology, which also offers many other benefits. It eliminates the need for an optocoupler and allows secondary-side control that delivers fast transient performance, exceptional CV/CC regulation and very low no-load power consumption. Additionally, FluxLink technology also facilitates implementation of synchronous rectification, which results in an extremely efficient power-supply solution.
The reference design DER-533 implements profile 2 of the USB-PD standard and is capable of delivering 5 V, 3 A and 9 V, and 2.2 A of power over a standard 3 A USB type-C cable. The AC input voltage range is 85 V to 264 V.