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All   >>  Energy Efficiency   >>   Power Supplies   >>   Questions
 

Hi I am using a MC33025 in voltage mode together with a transformer to produce +/-400V. The transformer starts to whistle when i turn on the high voltage. I have RT set to 6k8 and ct set to 2n2. Is this too low? Error amp input has a cap between pin one and 2 but what value must this be? as the datasheet does not give any calculations for this.

Would you please submit your request with attached application details, switching waveforms at different loads and the schematic via our technical support link at: https://www.onsemi.com/PowerSolutions/myon/ticProfile.do . Thank you. Answered by:
ON Semiconductor
2013-01-16 05:10:20.46