[sdiy] Snubber Capacitors

[Stewart Pye]

Thanks to all for the replies. I'll see if I can do some calculations...

Regards,
Stewart.


Richie Burnett wrote:
> Snubbers across bridge rectifier diodes in 50/60Hz supplies are there to damp HF
> ringing that occurs when the rectifier diodes abruptly switch large currents. 
> You really should include some series resistance too, as adding capacitance
> alone just lowers the ringing frequency but does little to damp it.
>
> This document explains how they work and how to design them:
>
> http://www.hagtech.com/pdf/snubber.pdf
>
> Page 7 onwards deals with low-frequency "conventional" power supplies.
>
> -Richie,
>
>   
>> Hi,
>>
>> I'm designing a power supply for my synth. I want to put snubber caps
>> for the bridge rectifier on the PCB in case I find a need for them, but
>> am not sure whether to have one across each diode, or just one across
>> the bridge. Also sometimes a series RC circuit is used. Would it be best
>> to include room for a resistor as well?
>>
>>
>>
>> Regards,
>> Stewart.
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