Buck Converter - Additional filtering ?

Wp100 · Jul 31, 2017

Hi,

Am using the Mini-360 buck converters to provide the 5v for an arduino based project with ds18b20 sensors and driving 5v and 12v fans .
Using analogue only for a simple 4 switch resistor network

Do these little devices need any additional input or output capacitors / filtering ?

Thanks

MrAl · Jul 31, 2017

Wp100 said:
Hi,

Am using the Mini-360 buck converters to provide the 5v for an arduino based project with ds18b20 sensors and driving 5v and 12v fans .
Using analogue only for a simple 4 switch resistor network

Do these little devices need any additional input or output capacitors / filtering ?

Thanks

Hi,

Only if your application needs it.

A typical post filter for any switcher is a small inductor maybe 2uH and a capacitor. The inductor should have low ESR.
An important point is that the feedback location point does not change even after adding the post filter.

crutschow · Jul 31, 2017

Good grounding and ground scheme is also important in minimizing noise.
It should be build with a copper ground plane if possible.

ci139 · Jul 31, 2017

maybe
https://www.powerampdesign.net/images/AN-24_Eliminating_Circuit_Noise_From_Cooling_Fans.pdf
by: https://www.google.com/search?q=bldc+fan+supply+filter
https://www.analog.com/media/en/training-seminars/tutorials/MT-095.pdf
by: https://www.google.com/search?q=12v...field+shielding+system+board+psu+emi+arrester
but i don't think ↑they↑ cover fans as the alternator with rotating magnets - the interleaves orientation for mounting , the shielding (?in compactly fit systems)

Buck Converter - Additional filtering ?

Wp100

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MrAl

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crutschow

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ci139

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Buck Converter - Additional filtering ?

Wp100

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ci139

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