Basic LED Design Questions: Understanding LED Thermal Interface Material Selection using Simple Thermal Resistance Test Tool and Understanding - (PPT)

摘要

Simple Thermal R Testing 1. Useful for materials with Thermal Impedance ＞ than about 0.3 to 0.4 C in2/W. 2. Samples not thicker than about 2mm. Above 2mm thickness, edge heat losses on some sample test set-up can influence results so that thermal impedance is measured too p low. 3. For a quick and easy TM, with decent test results, the TM is quite good. 4. The Simple Test Method may better reflect the actual end use application conditions vs. a more controlled, very flat, smooth surfaces of an ASTM D5470 TM. 5. Easy to run many samples quickly (<10 minutes/sample) 6. Data sheet comparative tester/"Apples to Apples" TM 7. Simple, Low Cost Test Method, "Hands On" for Learning