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To USB or Not to USB

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USB Power Delivery up to 100W of power, Specification Goes Final & Public

Posted by on August 6, 2012

USB delivers power, enough to charge your mobile phone or tablet, but slower than you want.  You need more power for faster charging, so the inventors of USB invented USB Power Delivery. 

The specification is now final and approved by the USB-IF.

USB 3.0 delivers up to 4.5W of power for charging.

This is an improvement of over USB 2.0’s 2.5W.

The Battery Charging 1.2 specification delivers up to 7.5W of power over USB 2.0 or USB 3.0 cables.  This is typically a wall charger, plugged into an outlet. Circuitry in your Kindle Fire or mobile phone that says “I can deliver up to 7.5W of power” and the phone says, “Bring it” (Or “I can handle Battery Charging 1.2 so go ahead and deliver the amps so can charge at with 7.5W of power”).

 

The big deal with USB Power Delivery is that

  1. It works with either USB 2.0 or USB 3.0
  2. Delivers power in either direction from the Host to the Device or the Device to the Host
  3. You get to have a single cable for both power and data
  4. There’s lots more power

For example, your Monitor could charge your PC OR your PC could power your monitor.

At the same time, the USB cable would deliver the video from your PC to your Monitor.

Power Delivery

 

More on USB Power Delivery tomorrow

 

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http://blogs.synopsys.com/tousbornottousb/

 

Borrowing Humor

You’ve been enjoying the Summer Olympics.  Here’s my favorite commercial, courtesy of Sears.

 

Sears Commercial

 

This, to me, is the best Home Appliance Commercial Ever Made.

It has nothing to do with USB, but I might have something tomorrow.

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This post is filed under USB 2.0, USB 3.0, USB Power, USB Power Delivery.
 
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About
Covering the latest trends and topics in USB IP.

Eric started working on USB in 1995, starting with the world’s first BIOS that supported USB Keyboards and Mice while at Award Software. After a departure into embedded systems software for real-time operating systems, he returned to USB IP cores and software at inSilicon, one of the leading suppliers of USB IP. In 2002, inSilicon was acquired by Synopsys and he’s been here since. He also served as Chairman of the USB On-The-Go Working Group for the USB Implementers Forum from 2004-2006.

Eric received an M.B.A. from Santa Clara University and an M.S. in Engineering from University of California Irvine, and a B.S. in Engineering from the University of Minnesota. and is a licensed Professional Engineer in Civil Engineering in the State of California.


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