piclist 2002\09\26\152121a >
Thread: 2-tran SMPS , NOW: Transient suppressors
picon face BY : Morgan Olsson email (remove spam text)

Mike P.. wrote:
>His point is that inserting any significant resistance in
>the crowbar circuit may well prevent it from conducting as
>well as it needs to -- it must have super low resistance in
>order to suppress voltage spikes from low impedance sources.

The idea with *output* crowbar is to protect when the switcher go bananas (control cirquit/switch, etc)

Can´t normally make hundreds of amps, if it did, then just arrange the tracks intelligently and it pulls down correctly anyway.

For using fets, the turn on is not well enough defined, and also too soft/high resistance.


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In reply to: <200209261802.PUK05763@vmms1.verisignmail.com>
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Subject (change) 2-tran SMPS , NOW: Transient suppressors

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