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Original question:

Audible Noise from MC34063

MC33063A: Audible Noise from DC to DC Converter MC33063A

Gopala Krishna1
Prodigy 50 points
Part Number: MC33063A

I am using MC33063 in Step Down mode to achieve 5V, 700 mA from 24V VDC Input.

During the testing with Resistive load (e.g. No Load to 700 mA) continuous Humming Noise is listened.

I have conducted several tests to resolve this issue but solution not found.

Please help me resolve this issue.