18W USB PD Reference Design from Power Integrations and Weltrend

June 26, 2017 by Jeff Shepard

USB PD adds significant intelligence to adapters and allows more power to be delivered flexibly and safely. Users can expect faster charge times for the larger batteries required to power next-generation mobile devices.

A joint reference design from Power Integrations in association with Weltrend Semiconductor describes an 18W, USB PD compliant, ac-dc power converter targeted at chargers for smart mobile devices. DER-567 pairs the WT6630P USB Type-C™ Power Delivery (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. By providing a constant power output, Power Integrations’ InnoSwitch-CP switcher IC allows battery-operated devices to draw maximum power from the charger at the selected output voltage, optimizing charge time and cost.