Power Integrations and Cypress Semiconductor have developed a joint reference design describing a 20 Watt, 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 adaptor that is fast, compact and highly energy efficient.
The Cypress controller complies 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 adaptors, monitors, docks and cable adaptors (dongles). It reduces the bill of materials by integrating a Type-C transceiver, termination resistors and system-level ESD.
By providing a constant power output, InnoSwitch-CP allows battery operated devices to draw up to the maximum power of the charger at any selected output voltage, optimising charge time and cost. It uses Power Integrations’ innovative FluxLink technology, eliminating the need for an optocoupler and enabling secondary-side control that delivers fast transient performance, exceptional CV/CC regulation and very low no-load power consumption. FluxLink technology also enables easy implementation of safe synchronous rectification, resulting in an extremely efficient power supply.
DER-533 implements Profile 2 of the USB-PD standard and is capable of 5 V/3 A and 9 V/2,2 A of power delivery over a standard 3 A USB Type-C cable.
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