| Electronics > Projects, Designs, and Technical Stuff |
| LM2596 Controllable Buck Converter Switching Noise on Signal |
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| syntax333:
Hi, I am using LM2596 Power Module to convert 18V to 10V for my application. However, signal that I am working on has spikes with constant frequency. I checked everything on circuit and found out my cheap power module has the same switching frequency. In attachment you can see both my signal and switching of LM2596. Power output of LM2596 is connected do decoupling capacitors of the ICs which outputs this signal. Is there a way to get rid of this noise? or better converter suggestion which has better characteristics? Thank you. |
| madires:
The LM2596 has a switching frequency of 150kHz. Maybe a poor counterfeit? |
| syntax333:
Probably :( I was thinking plugging a linear L7809CV regulator to output of power module. Do you think this will help the situation? Can you suggest other regulators with better performance? |
| wraper:
--- Quote from: madires on May 01, 2019, 04:33:55 pm ---The LM2596 has a switching frequency of 150kHz. Maybe a poor counterfeit? --- End quote --- Not maybe but certainly counterfeit. 99% of these modules on ebay and aliexpress use counterfeit IC. |
| mariush:
It's probably a clone of LM2576 ... which in theory is supposed to be a 52 kHz switching regulator. |
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