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Buck Converter - Additional filtering ?

Discussion in 'Electronic Projects Design/Ideas/Reviews' started by Wp100, Jul 31, 2017.

  1. Wp100

    Wp100 Active Member

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    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
     
  2. MrAl

    MrAl Well-Known Member Most Helpful Member

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    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.
     
  3. crutschow

    crutschow Well-Known Member Most Helpful Member

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

    Dave New Member

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  5. ci139

    ci139 Active Member

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    maybe
    http://www.powerampdesign.net/images/AN-24_Eliminating_Circuit_Noise_From_Cooling_Fans.pdf
    by: https://www.google.com/search?q=bldc+fan+supply+filter
    http://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)
     

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