SNUBBER resistance burns out in seconds(SMPS)

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but jackinnj
acc to the formula posted by u the power dissipiation should increase by increasing the capacitance,but here its decreasing.

Dear Rob
i am not saying that u r argumanting,whatever you are saying i am taking in a constructive way.
What i meant to say in case of pc oscillioscope is that i find PC OSCILOSCOPE very bore,slow response time,all the apparatus placed closed to pc makes the area cluttered and irritating.....else using the osciloscope is real fun(i am not getting overboard)

Sagar
 
Is the timing capacitor C16 missing, low in value or has an open circuit track? Likewise R15 too low a value. That would make the circuit switch (inefficiently) at a very high frequency. You would still get a normal output voltage at modest loads but that snubber would fry.
 
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