If VCONN is removed, the device is powered by VBUS. If VCONN is available and detected, the connected device is powered by VCONN. To protect connected devices when the voltage suddenly rises, the USB Type-C Cable and Connector Specification requires that the pins connected to the VBUS pin can tolerate voltages up to 21V.įor electrically marked USB cables, both VCONN and VBUS can provide power. Under USB PD protocol, the VBUS voltage can be as high as 20V. The VCONN pin does not have particular specifications, as it is always between 3V and 5V, but VBUS has a wide voltage range that must comply with a different protocol, such as USB PD. The USB Type-C specifications define two potential power sources: VBUS and VCONN. The USB Type-C specification defines four pairs of power pins to deliver power, and two CC pins to detect the device status. This article will discuss USB Type-C specifications, and recommendations for how to design a simplified power delivery solution that meets the necessary requirements for powering portable devices and accessory applications. The USB Implementers Forum (USB-IF) released guidelines for USB Type-C called USB Type-C Cable and Connector Specification, which outlines the standards for USB Type-C to achieve their versatility. USB Type-C (also called USB-C) can support multiple protocols, such as USB 3.1, DisplayPort, HDMI, and USB PD. Among their many benefits are their small size, easy-to-use features, and versatility. Lattice Semiconductor Reference DesignsĪpplications and portable devices with USB Type-C connectors have become increasingly common in recent years.Switching Converters and Controllers AECQ Grade.BLDC Pre Drivers and Integrated Solutions.Digital Isolators with Integrated Power.Multi Phase Controllers & Intelli-Phase.

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