http://www.helpedia.com/index.php?title=Gembird_car_USB_charger&feed=atom&action=historyGembird car USB charger - Revision history2024-03-28T11:22:01ZRevision history for this page on the wikiMediaWiki 1.32.2http://www.helpedia.com/index.php?title=Gembird_car_USB_charger&diff=115&oldid=prevMariush: /* Introduction */2014-03-15T00:52:15Z<p><span dir="auto"><span class="autocomment">Introduction</span></span></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="en">
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 00:52, 15 March 2014</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>
<td colspan="2" class="diff-lineno">Line 1:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Introduction==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Introduction==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>In this video, a Gembird MP3A-CAR-5P1 car USB charger is reviewed, repaired, tested and opened to analyze its internal circuitry.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>In this video, a Gembird MP3A-CAR-5P1 car USB charger is reviewed, repaired, tested and opened to analyze its internal circuitry. <ins class="diffchange diffchange-inline">Its efficiency is analyzed and compared to linear regulators.</ins></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Description==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==Description==</div></td></tr>
</table>Mariushhttp://www.helpedia.com/index.php?title=Gembird_car_USB_charger&diff=114&oldid=prevMariush: Created page with "==Introduction== In this video, a Gembird MP3A-CAR-5P1 car USB charger is reviewed, repaired, tested and opened to analyze its internal circuitry. ==Description== {{#ev:yo..."2014-03-15T00:51:26Z<p>Created page with "==Introduction== In this video, a Gembird MP3A-CAR-5P1 car USB charger is reviewed, repaired, tested and opened to analyze its internal circuitry. ==Description== {{#ev:yo..."</p>
<p><b>New page</b></p><div>==Introduction==<br />
<br />
In this video, a Gembird MP3A-CAR-5P1 car USB charger is reviewed, repaired, tested and opened to analyze its internal circuitry.<br />
<br />
<br />
==Description==<br />
<br />
{{#ev:youtubehd|loRv7HK_aLs|480|right|Gembird MP3A-CAR-5P1 car USB charger review and teardown}}<br />
<br />
Taking advantage of a sale, the author purchases this USB card charger in order to investigate how easy it is to adapt this product into a general purpose DC-DC converter for various hobby projects.<br />
<br />
As the charger is opened up, author determines it uses a very popular and cheap switching regulator [http://www.onsemi.com/PowerSolutions/product.do?id=MC34063A MC34063], which is manufactured by several companies all over the world. The design of the charger follows the typical step-down regulator schematic presented in various datasheets for this regulator IC.<br />
<br />
As the main IC turns out to be faulty, the author resorts to replacing it with a compatible IC [http://www.onsemi.com/PowerSolutions/product.do?id=NCP3063 NCP3063] and then starts to investigate if the charger is actually capable of achieving the specifications on its label. <br />
<br />
Several measurements are performed at various voltages and current loads in order to draw efficiency curves for the charger and prove one of the main advantages of using such DC-DC converters, much higher efficiency compared to regular linear regulators.<br />
<br />
[[Category:Reviews]]<br />
[[Category:Teardowns]]</div>Mariush