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Old 6th July 2012, 11:29 PM   #1611
Salas is online now Salas  Greece
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Quote:
Originally Posted by mjock3 View Post
It was 2.45 volts.
0.98A if it is 2.5R spot on, so no mistake there. Should be the mounting back gap. Solve that first. Was the dummy hot also? I wanna know that current flows to dummy for sure too.
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Old 7th July 2012, 12:37 AM   #1612
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I have replaced the heatsink with the other one full contact on back. It still gets very hot. I unplugged it after it hit 240 F. Dummy load does get warm. The transformer I am using is a Triad vps16-2700. Could that cause this?
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Old 7th July 2012, 12:46 AM   #1613
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Do you connect F+,S+ at one dummy's lead and F0,S0 at the other?
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Old 7th July 2012, 12:47 AM   #1614
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Do you connect F+,S+ at one dummy's lead and F0,S0 at the other?
Yes
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Old 7th July 2012, 12:49 AM   #1615
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Is IR9610 CCS Mosfet as hot? And what is the AC voltage on PCB's trafo connector while working?
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Old 7th July 2012, 12:56 AM   #1616
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Is IR9610 CCS Mosfet as hot? And what is the AC voltage on PCB's trafo connector while working?
Salas,

I am sorry it is the IR9610 that is hot, the 9530 is about 109 F. AC voltage at connector is 18.35 V.
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Old 7th July 2012, 01:02 AM   #1617
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Now we are talking. ~19W dissipation on it. Use half a secondary VAC.
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Old 7th July 2012, 01:13 AM   #1618
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Old 7th July 2012, 01:24 AM   #1619
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Old 7th July 2012, 01:49 AM   #1620
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Thanks Salas for all the help.
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