18 W USB PD Rapid-Charger Reference Design for Smart Mobile Devices

Power Integrations (Nasdaq: POWI), the leader in high-voltage integrated circuits for energy-efficient power conversion, in association with Weltrend Semiconductor Inc. (TWSE: 2436), the leader in USB Type-C^TM Power Delivery (PD) controllers, today announced a joint reference design describing an 18 W, USB PD compliant, AC-DC power converter targeted at chargers for smart mobile devices. The design, titled DER-567, pairs the WT6630P USB Type-C PD controller from Weltrend with Power Integrations’ InnoSwitch™-CP off-line CV/CC flyback switcher IC, enabling designers to produce a compact and highly energy-efficient standards-compliant power adapter.
Weltrend’s WT6630P USB PD controller is certified by USB Implementers Forum (USB-IF) for USB Type-C and is compatible with the USB PD 2.0 baseband communication protocol. The Weltrend device reduces the BOM by combining Type-C cable detection circuits, USB PD physical layer (PHY), and components related to system-level protections such as over-voltage protection (OVP), over-current protection (OCP), and over-temperature protection (OTP).
By providing a constant power output, Power Integrations’ InnoSwitch-CP switcher IC allows battery-operated devices to draw maximum power from the charger at any selected output voltage, optimizing charge time and cost. InnoSwitch-CP ICs use the company’s 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.
Reference Design, DER-567, implements USB PD standard 2.0 and is capable of 5 V/3 A and 9 V/2 A of power delivery over a standard non-E-marked USB Type-C cable. More information on the Weltrend controller is available at http://www.weltrend.com/en-global/product/detail/67/112/395.

The design may be downloaded at http://www.power.com/der-567.