https://community.element14.com/challenges-projects/design-challenges/wireless-power-i/w/documents/10570/article---universally-compatible-wireless-power-using-the-qi-protocolen-USTelligent Community 12https://community.element14.com/challenges-projects/design-challenges/wireless-power-i/w/documents/10570/article---universally-compatible-wireless-power-using-the-qi-protocolFri, 08 Oct 2021 05:15:18 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:09bef667-599f-4108-9502-a106e54fa3f4ssilberhornhttps://community.element14.com/challenges-projects/design-challenges/wireless-power-i/w/documents/10570/article---universally-compatible-wireless-power-using-the-qi-protocol#commentsCurrent Revision posted to Documents by ssilberhorn on 10/8/2021 5:15:18 AM<br /> <p style="margin:0;">By Upal Sengupta and Bill Johns, Texas Instruments</p><p style="margin:0;padding:0px;">&nbsp;</p><p class="story" style="margin:0;">Wireless&nbsp; power systems are emerging as a practical option for conveniently recharging&nbsp; mobile phones and other handheld devices. Implementing an industry standard&nbsp; interface allows a common charging pad (TX) to recharge multiple types of&nbsp; battery-operated devices (RX). The WPC developed the Qi standard for wireless&nbsp; power systems with up to 5W of output power. This allows complete interoperability between transmitters and receivers independent of device&nbsp; manufacturer.&nbsp; This standard defines the means of implementing a number&nbsp; of functions that enhance the utility and efficiency of a wireless power system,&nbsp; for example:</p><ul><li>The charging pad does not consume significant amounts of standby power when idle (no device placed on the pad).</li><li>The TX can detect the presence of an object placed on the pad, and further determine that it is a valid, Qi-compliant RX device.<strong> </strong></li><li>Once an object is placed on the charging pad, the transmitter can output a variable power level based on the TX’s requirements.<strong> </strong></li></ul><p style="margin:0;"> The RX unit communicates its power needs back to the TX unit over the same magnetic coupling used for power transmission. <a class="jive-link-external-small" href="http://www.low-powerdesign.com/article_TI-Qi.html" rel="nofollow ugc noopener" target="_blank">Read More Here</a></p><p style="margin:0;padding:0px;">&nbsp;</p><p style="margin:0;"><a href="http://www.low-powerdesign.com/picts/Qi-Figure3.jpg"><img alt="http://www.low-powerdesign.com/picts/Qi-Figure3.jpg" class="jive-image" height="327" src="http://www.low-powerdesign.com/picts/Qi-Figure3.jpg" width="472" /></a></p><div style="clear:both;"></div> <div style="font-size: 90%;">Tags: wireless_power_charging, wp_challenge_one, wireless_power_consortium</div>