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Problem with noise in a 400W switching power supply

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simo

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noise problem

i have 400w switching power supply,but i have a problem of the noise around 100khz and 300khz
pleas if you have any solution for that problem to move this switchin frequencies to moor the 4 Mhz .
thanks you
 

Re: noise problem

elcielo said:
you use power inductor and capacitor.

power inductor https://www.coilcraft.com
Click to expand...



thank you very much for your response.
to be moor specified, this switching power supply used for radar system delivering 24 v ,10 A.
i would like you to help me to find the right filter that can filter all frequencies less the 500 mhz.
thanks you
regards
 

Re: noise problem

**broken link removed**

DC Noise Filter for the Next Generation Telecommunication System
The world-class compact On-board type was born
with high current density!
 

Re: noise problem

simo said:
i have 400w switching power supply,but i have a problem of the noise around 100khz and 300khz
pleas if you have any solution for that problem to move this switchin frequencies to moor the 4 Mhz .
thanks you
Click to expand...

I think if you want to reduce noise
use Switch_regulator + Linear Regulator
 

Re: noise problem

For radar system, I think there should be some synchronisation between the switching frequency and pulse repetition frequency, such that you don't see the power supply switching spurii in the transmitter spectrum. Any microwave TWTA books will discuss about power supply synchronisation circuit.
 

Re: noise problem

lguancho, are you able to provide a few titles for the micowave TWTA books that you suggested?
 

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