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I continue this post to ask another question about a switching power supply.
It's about a half bridge, with a TL494. I've been using it for a few months, but it has a problem. Every 2ms - 3ms, there is short burst of noise of high frequency, 6 MHz, of 10Vpp.
I don't know how to get ride of this noise, or stability problem...????
Is very small the output filter?
The feedback loop needs compensation?
It's too high the switch freq?
It's necessary a load all the time to consume a minimum current?
How do you trouble this IC/topology?
Configuration:
TL494
* Output voltage 700V
* Gain loop: 400
* Switching frequency 200kHz
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