New USB certification logo announced for USB4 with up to 40Gbps forwarding and USB PD EPR capable of 240W power supply
The USB Implementers Forum (USB-IF), an organization that develops specifications for the USB standard, is certified to support 60W or 240W power supply based on the USB Type-C charging standard ' USB Power Delivery (USB PD)'. Announcing a new USB Type-C cable and USB 4 logo.
USB-IF Announces New Certified USB Type-C® Cable Power Rating Logos
(PDF file) https://www.usb.org/sites/default/files/2021-09/USB-IF_Cable Power Rating USB4 Logo Announcement_FINAL.pdf
USB-IF Announces New Certified USB Type-C® Cable Power Rating Logos | Business Wire
The USB standard has been in turmoil since the announcement of USB 3.0 in 2008. The standard originally considered USB 3.0 was called 'USB 3.1 Gen 1' with the advent of USB 3 and 1 in 2013, and the original USB 3.1 is now called 'USB 3.1 Gen 2'. .. Furthermore, when USB 3.2 is announced in 2017, 'USB 3.2 Gen 1x1 (conventional USB 3.0 Gen 2)' 'USB 3.2 Gen 1x2' 'USB 3.2 Gen 2x1 (conventional USB 3.1 Gen 2)' 'USB 3.2 Gen The standard name has been changed to '2x2'. However, there have been strong criticisms that this naming is only confusing to users because it is difficult to distinguish between standards.
A refreshing explanation of the USB standard, which is a mixture of old and new, and is extremely confusing --GIGAZINE
Furthermore, the USB power supply standard exists separately from the above standard and was named 'USB Battery Charging Specification' or 'USB PD', but it is difficult to understand how much power can be sent from that name. Even if I tried to buy a cable that I wanted to use to charge a smartphone or laptop, there was a problem that consumers could not tell which cable was suitable for power supply.
And below is a table summarizing the new logos announced by USB-IF.
The logo is basically 'USB4 40Gbps ', which indicates USB4, which is the next-generation USB standard with a maximum transfer rate of 40Gbps, and USB PD Extended Power Range (EPR ) based on USB PD 3.1 (PDF file) announced in May 2021. There are two types of 'USB Type-C 240W Cable ' that can supply up to 240W with), and a package version and a cable / port version are available for each. In addition, there are a total of 7 types, including the logo that combines transfer speed and power supply, and the logo that only uses USB 240W power supply.
PC Gamer, a PC-related news site, said, 'By marking only the transfer speed and the wattage of the maximum power supply on the logo, it is easier to identify the required cable and it is less confusing.'
in Hardware, Posted by log1i_yk