18W smart mobile reference design uses USB Type-C power delivery

18W smart mobile reference design uses USB Type-C power delivery

Technology News |
By Nick Flaherty

The DER-567 pairs the WT6630P USB Type-C PD controller from Weltrend with Power Integrations’ InnoSwitch-CP off-line flyback switcher, enabling designers to produce a compact and highly energy-efficient standards-compliant power adapter.

“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,” said Shyam Dujari, director of marketing for Power Integrations.

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, the switcher allows battery-operated devices to draw maximum power from the charger at any selected output voltage, optimising charge time and cost. It uses PI’s FluxLink technology that removes the need for an optocoupler and enabling secondary-side control that delivers fast transient performance with voltage and current regulation and very low no-load power consumption.

“With Type-C cable and USB PD protocol support, an 18 W adapter is the logical next level for rapid charging and we are pleased to work with Weltrend on this joint reference design,” said Dujari. “The WT6630P controller delivers a highly cost-effective implementation of the USB 2.0 specification, helping leading suppliers in bringing a USB PD compliant adapter to the market. The design is already in mass production by a leading smartphone OEM.”

The DER-567 reference design 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 USB Type-C cable.

More information on the Weltrend controller is available at The design may be downloaded at


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