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Re: beads and zero ohm resistors

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John Larkin wrote...
>
>  I don't think we've had any beads fail from
> capacitive charge inrush, but I guess it might
> happen if there were giant electrolytics downstream.

 I have an inrush problem with some of my high-voltage
 pulser designs, which have electrolytics to deliver
 pulses up to 20A.  Large external capacitors are also
 allowed.  In my prototypes I hold off the HV until
 200ms after the low-V supplies settle.  This means
 the switching MOSFET must dissipate a substantial
 amount of energy, 1/2 C V^2, or up to 120J for the
 onboard caps, and much more for any outboard caps.


-- 
 Thanks,
    - Win

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beads and zero ohm resistors John Larkin <jjlarkin@highlandtechnology.com> - 2016-09-28 11:38 -0700
  Re: beads and zero ohm resistors Cursitor Doom <curd@notformail.com> - 2016-09-28 18:59 +0000
    Re: beads and zero ohm resistors Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2016-09-28 12:57 -0700
      Re: beads and zero ohm resistors John Larkin <jjlarkin@highlandtechnology.com> - 2016-09-28 16:17 -0700
        Re: beads and zero ohm resistors John S <Sophi.2@invalid.org> - 2016-09-29 07:16 -0500
  Re: beads and zero ohm resistors boB <boB@theresnoplacelikehome.com> - 2016-09-28 14:11 -0700
    Re: beads and zero ohm resistors John Larkin <jjlarkin@highlandtechnology.com> - 2016-09-28 14:21 -0700
    Re: beads and zero ohm resistors Winfield Hill <hill@rowland.harvard.edu> - 2016-09-29 07:00 -0700
      Re: beads and zero ohm resistors boB <boB@theresnoplacelikehome.com> - 2016-09-29 13:59 -0700
        Re: beads and zero ohm resistors Winfield Hill <hill@rowland.harvard.edu> - 2016-09-29 14:21 -0700
          Re: beads and zero ohm resistors boB <boB@theresnoplacelikehome.com> - 2016-09-30 00:45 -0700
            Re: beads and zero ohm resistors "Tim Williams" <tiwill@seventransistorlabs.com> - 2016-09-30 22:18 -0500
              Re: beads and zero ohm resistors krw <krw@nowhere.com> - 2016-10-01 23:00 -0400
            Re: beads and zero ohm resistors krw <krw@nowhere.com> - 2016-10-01 22:58 -0400
  Re: beads and zero ohm resistors "Tim Williams" <tiwill@seventransistorlabs.com> - 2016-09-29 00:06 -0500
  Re: beads and zero ohm resistors dagmargoodboat@yahoo.com - 2016-09-29 06:16 -0700
    Re: beads and zero ohm resistors dagmargoodboat@yahoo.com - 2016-09-29 07:42 -0700
  Re: beads and zero ohm resistors George Herold <gherold@teachspin.com> - 2016-09-29 07:00 -0700
    Re: beads and zero ohm resistors dagmargoodboat@yahoo.com - 2016-09-29 07:46 -0700
      Re: beads and zero ohm resistors John Devereux <john@devereux.me.uk> - 2016-09-29 16:03 +0100
        Re: beads and zero ohm resistors George Herold <gherold@teachspin.com> - 2016-09-29 08:16 -0700
          Re: beads and zero ohm resistors dagmargoodboat@yahoo.com - 2016-09-29 09:02 -0700
        Re: beads and zero ohm resistors dagmargoodboat@yahoo.com - 2016-09-29 08:52 -0700
          Re: beads and zero ohm resistors John Devereux <john@devereux.me.uk> - 2016-09-29 16:56 +0100
            Re: beads and zero ohm resistors dagmargoodboat@yahoo.com - 2016-09-29 09:10 -0700
  Re: beads and zero ohm resistors Simon S Aysdie <gwhite@ti.com> - 2016-09-29 15:20 -0700
  Re: beads and zero ohm resistors John Larkin <jjlarkin@highlandtechnology.com> - 2016-09-29 20:14 -0700
  Re: beads and zero ohm resistors Robert Loos <1209@baer-gmbh.com> - 2016-09-30 11:40 +0200
    Re: beads and zero ohm resistors John Larkin <jjlarkin@highlandtechnology.com> - 2016-09-30 07:40 -0700
      Re: beads and zero ohm resistors Winfield Hill <hill@rowland.harvard.edu> - 2016-10-02 08:57 -0700

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