USB PD-compliant 18W converter targets smart devices

Article By : EDN Asia

The DER-567 reference design is capable of 5V/3A and 9V/2A of power delivery over a standard non-E-marked USB Type-C cable.

Power Integrations and Weltrend Semiconductor have released a joint reference design for an 18W, USB Type-C Power Delivery (PD) compliant, AC-DC power converter targeting chargers for smart mobile devices.

The DER-567 reference design pairs the WT6630P USB Type-C PD controller from Weltrend with Power Integrations’ InnoSwitch-CP off-line CV/CC flyback switcher IC, allowing designers to produce a compact and 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 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), according to the company.

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, optimiing 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, according to Power Integrations.

The DER-567 reference design implements USB PD standard 2.0 and is capable of 5V/3A and 9V/2A of power delivery over a standard non-E-marked USB Type-C cable.

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