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Embedded and Microcontrollers
Embedded Forum simple switching supply spike suppression
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Related

simple switching supply spike suppression

Former Member
Former Member over 15 years ago

Refering to power supply design for simple 8-bit embedded system.

If a spike were to strike at the input of a simple switching supply, say built using LM2576, will the spike be reflected at the ouput?

Does switching supply offer some sort of protection without the need of adding TVS or MOV?

Does a linear supply designed with LM317 preform better at suppressing spike internally?

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  • enrico.migchels
    0 enrico.migchels over 15 years ago

    Yes, this is called line regulation. See the graph below

     

    In general a spike on the grid will be suppressed by the input stage, the LM2576 offers a fast response on input voltage changes (in general all HF SMPS circuit will do). Anyway, make sure that there is sufficient input capacitance. This will damp transients greatly (extra countermeasure).

     

    Best regards, Enrico Migchels

     

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