SMPS Zentith ZPS-300A - should output stabilize immediately?

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brunofunchas

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SMPS Zentith ZPS-300A

Hi,

I have substituted the Schottky diode on this SMPS because they were shorted.

When I start the SMPS it takes approximately 30seconds for the output voltages to appear correctly. I have no load on the outputs, but when I measure the outputs with my multimeter it starts to show “floating” values, then it stabilizes on the correct values.

The output should stabilize immediately?

Thanks in advance,
Bruno
 

SMPS Zentith ZPS-300A

take an oscilloscope and lool at it.
best wishes!
 

Re: SMPS Zentith ZPS-300A

Hi,

I have looked at the waveforms with a scopemeter and I can not see any logic in shape of the waves. After it stabilizes it has a constant format.

My big doubt is if it is normal in SMPS to have these instabilities at start?

Regards,
Bruno
 

Re: SMPS Zentith ZPS-300A

Hi,

You can find the answer in the following link:

**broken link removed**

Regards,
Bruno
 

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