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Groups > sci.electronics.design > #458789
| From | Winfield Hill <hill@rowland.harvard.edu> |
|---|---|
| Newsgroups | sci.electronics.design |
| Subject | Re: DC current sources |
| Date | 2017-05-04 14:32 -0700 |
| Organization | Rowland Institute |
| Message-ID | <oeg6mb08fu@drn.newsguy.com> (permalink) |
| References | <5909c9eb$0$34631$b1db1813$15bdbe48@news.astraweb.com> <C96dnUd2KbbMUZfEnZ2dnUU7-RWdnZ2d@giganews.com> |
John Robertson wrote...
>
> I was thinking of LM350T regulators, programmed with a power
>> resistor in the range 0.6-10 ohms... but the 2degC/W heat sink
>> for each one could be an issue (thinking 2A, 14.7V, shorted to
>> earth; 30W).
Yes. I had suggested an efficient buck converter
to about 9.5V to set the Vmax compliance range,
then LM350T, etc., as individual current sources.
If there's a short fault on a channel, the '350T
will thermally limit, you probably want it to do
that anyway, well below 2A to save power. Just
a simple clip-on heat 2W heat sink for each one.
--
Thanks,
- Win
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DC current sources Clifford Heath <no.spam@please.net> - 2017-05-03 22:15 +1000
Re: DC current sources George Herold <gherold@teachspin.com> - 2017-05-03 05:55 -0700
Re: DC current sources "Ian Field" <gangprobing.alien1@virginmedia.com> - 2017-05-03 19:40 +0100
Re: DC current sources tabbypurr@gmail.com - 2017-05-06 00:39 -0700
Re: DC current sources Martin Brown <'''newspam'''@nezumi.demon.co.uk> - 2017-05-03 14:06 +0100
Re: DC current sources Winfield Hill <hill@rowland.harvard.edu> - 2017-05-03 11:06 -0700
Re: DC current sources "Ian Field" <gangprobing.alien1@virginmedia.com> - 2017-05-03 19:43 +0100
Re: DC current sources Winfield Hill <hill@rowland.harvard.edu> - 2017-05-03 13:02 -0700
Re: DC current sources Winfield Hill <hill@rowland.harvard.edu> - 2017-05-03 17:22 -0700
Re: DC current sources tabbypurr@gmail.com - 2017-05-06 00:41 -0700
Re: DC current sources "dcaster@krl.org" <dcaster@krl.org> - 2017-05-03 06:15 -0700
Re: DC current sources Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> - 2017-05-03 11:10 -0400
Re: DC current sources Tim Wescott <tim@seemywebsite.com> - 2017-05-03 11:27 -0500
Re: DC current sources "Ian Field" <gangprobing.alien1@virginmedia.com> - 2017-05-03 19:47 +0100
Re: DC current sources Clifford Heath <no.spam@please.net> - 2017-05-04 12:41 +1000
Re: DC current sources "Ian Field" <gangprobing.alien1@virginmedia.com> - 2017-05-04 20:55 +0100
Re: DC current sources Clifford Heath <no.spam@please.net> - 2017-05-05 08:39 +1000
Re: DC current sources "dcaster@krl.org" <dcaster@krl.org> - 2017-05-03 09:37 -0700
Re: DC current sources Tim Wescott <seemywebsite@myfooter.really> - 2017-05-03 13:53 -0500
Re: DC current sources Clifford Heath <no.spam@please.net> - 2017-05-04 12:24 +1000
Re: DC current sources mike <ham789@netzero.net> - 2017-05-04 00:48 -0700
Re: DC current sources whit3rd <whit3rd@gmail.com> - 2017-05-04 14:09 -0700
Re: DC current sources Clifford Heath <no.spam@please.net> - 2017-05-05 08:42 +1000
Re: DC current sources mike <ham789@netzero.net> - 2017-05-03 13:22 -0700
Re: DC current sources whit3rd <whit3rd@gmail.com> - 2017-05-03 13:25 -0700
Re: DC current sources Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-05-03 13:45 -0700
Re: DC current sources whit3rd <whit3rd@gmail.com> - 2017-05-03 15:40 -0700
Re: DC current sources Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-05-03 16:04 -0700
Re: DC current sources krw@notreal.com - 2017-05-03 21:26 -0400
Re: DC current sources Clifford Heath <no.spam@please.net> - 2017-05-04 12:27 +1000
Re: DC current sources John Robertson <spam@flippers.com> - 2017-05-03 22:48 -0700
Re: DC current sources Clifford Heath <no.spam@please.net> - 2017-05-04 16:36 +1000
Re: DC current sources Jasen Betts <jasen@xnet.co.nz> - 2017-05-04 04:59 +0000
Re: DC current sources Chris Jones <lugnut808@spam.yahoo.com> - 2017-05-04 22:50 +1000
Re: DC current sources tabbypurr@gmail.com - 2017-05-06 00:53 -0700
Re: DC current sources John Robertson <spam@flippers.com> - 2017-05-03 23:38 -0700
Re: DC current sources Clifford Heath <no.spam@please.net> - 2017-05-04 16:45 +1000
Re: DC current sources John Robertson <spam@flippers.com> - 2017-05-04 11:16 -0700
Re: DC current sources Winfield Hill <hill@rowland.harvard.edu> - 2017-05-04 14:32 -0700
Re: DC current sources "Ian Field" <gangprobing.alien1@virginmedia.com> - 2017-05-05 20:21 +0100
Re: DC current sources Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-05-06 05:59 -0700
Re: DC current sources Steve Wilson <no@spam.com> - 2017-05-06 14:04 +0000
Re: DC current sources Robert Baer <robertbaer@localnet.com> - 2017-05-04 19:32 -0800
Re: DC current sources mike <ham789@netzero.net> - 2017-05-05 00:18 -0700
Re: DC current sources Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2017-05-05 08:28 +0000
Re: DC current sources Robert Baer <robertbaer@localnet.com> - 2017-05-05 22:09 -0800
Re: DC current sources Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2017-05-06 06:17 +0000
Re: DC current sources Robert Baer <robertbaer@localnet.com> - 2017-05-06 20:47 -0800
Re: DC current sources Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2017-05-07 08:27 +0000
Re: DC current sources Robert Baer <robertbaer@localnet.com> - 2017-05-05 22:07 -0800
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