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<span style="font-size:20px;"><span class="hps">About</span> <span class="hps">LED</span> <span class="hps">medical power supply</span> <span class="hps">cooling problem</span> <span class="hps">has been done</span> <span class="hps">many times</span> <span class="hps">in the previous</span> <span class="hps">discussion</span>.<br />
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<span class="hps">But in the</span> <span class="hps">heat</span> <span class="hps">technically</span> <span class="hps">there is a gap</span>, there are <span class="hps">some customers</span> <span class="hps">ask us</span> <span class="hps">businessmen</span> <span class="hps">said</span> <span class="hps">LED</span> <span class="hps">switching power</span> <span class="hps">dissipation</span> <span class="hps">problem can not be</span> <span class="hps">solved,</span> <span class="hps">not achieve the desired</span> <span class="hps">results.</span> <span class="hps">Today</span> <span class="hps">for the</span> <span class="hps">users</span> <span class="hps">to solve such problems</span> <span class="hps">on the LED</span> <span class="hps">heat dissipation</span> <span class="hps">design, the most</span> <span class="hps">likely to be</span> <span class="hps">overlooked is the</span> <span class="hps">light-emitting</span> <span class="hps">surface heating</span> <span class="hps">problems, such as</span> <span class="hps">CREE</span> <span class="hps">SMD</span> <span class="hps">10WLED,</span> <span class="hps">light-emitting surface</span> <span class="hps">temperature of</span> <span class="hps">100</span> <span class="hps">degrees or more</span>, in addition, <span class="hps">the absence of</span> <span class="hps">a certain</span> <span class="hps">space for</span> <span class="hps">the lens</span> <span class="hps">glow</span> <span class="hps">surface</span> <span class="hps">heat</span> <span class="hps">buffer</span>, will cause <span class="hps">thermal</span> <span class="hps">failure</span>, the light fades <span class="hps">in advance</span>.<br />
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LED cooling</span> <span class="hps">reasons for failure</span> <span class="hps">are the following</span> <span class="hps">aspects:</span><br />
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<span class="hps">1. LED</span> <span class="hps">light</span> <span class="hps">resistance</span> <span class="hps">large</span>, light <span class="hps">heat dissipation</span> <span class="hps">not</span> <span class="hps">use any</span> <span class="hps">thermal paste</span> <span class="hps">will cause</span> <span class="hps">thermal</span> <span class="hps">motion</span> <span class="hps">failed.<br />
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<span class="hps">2 Use the</span> <span class="hps">aluminum plate</span> <span class="hps">as</span> <span class="hps">PCB connector</span> <span class="hps">source,</span> <span class="hps">because</span> <span class="hps">aluminum plate</span> <span class="hps">with multiple</span> <span class="hps">resistance</span>, light <span class="hps">not</span> <span class="hps">heat transfer</span>, <span class="hps">thermal paste</span> <span class="hps">will make</span> <span class="hps">use of any</span> <span class="hps">thermal</span> <span class="hps">movement failed<br />
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<span class="hps">3 Use</span> <span class="hps">light</span> <span class="hps">aluminum plate</span> <span class="hps">as</span> <span class="hps">PCB connectors</span>, <span class="hps">and</span> <span class="hps">acts as a heat</span> <span class="hps">sink</span> <span class="hps">plate</span> <span class="hps">become</span> <span class="hps">a part of</span> <span class="hps">the radiator</span> <span class="hps">with</span> <span class="hps">hollow</span> <span class="hps">engagement</span>. <span class="hps">Because</span> <span class="hps">aluminum plate</span> <span class="hps">and heat sink</span> <span class="hps">thermal contact resistance</span> <span class="hps">is too large,</span> <span class="hps">the use of any</span> <span class="hps">thermal paste</span> <span class="hps">will cause</span> <span class="hps">thermal</span> <span class="hps">motion</span> <span class="hps">failed.</span></span>
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