OPTOISOLATED DC-DC
in [Design]
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From: Joerg on 29 Apr 2010 12:21 John Larkin wrote: > On Fri, 30 Apr 2010 01:43:19 +1000, "Phil Allison" <phil_a(a)tpg.com.au> > wrote: > >> "Johnny5" <dirtylogicdesigns(a)gmail.com >> >> >> ** Google Monkey alert !! >> >> >>> Gentlemen, I was curious on any ideas of an opto dc-dc converter >>> providing 20mA. Small footprint and heighth.. >>> Any ideas? Please and Thank You. >>> >>> VIN-8-16VDC >>> VOUT 5VDC 20mA, >> >> ** Ever though of using solar cells and a 12 volt lamp ?? >> >> > > Done carefully, that might approach 1% efficiency. > .... and go PHUT after a few thousand hours, requiring a quick trip to the autoparts store. -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: Spehro Pefhany on 29 Apr 2010 14:09 On Thu, 29 Apr 2010 07:37:08 -0700 (PDT), Johnny5 <dirtylogicdesigns(a)gmail.com> wrote: >Gentlemen, I was curious on any ideas of an opto dc-dc converter >providing 20mA. Small footprint and heighth.. >Any ideas? Please and Thank You. > >VIN-8-16VDC > VOUT 5VDC 20mA, It's certainly possible (since you don't specify efficiency), but it probably would cost in the thousands of dollars. JDS Uniphase might be a place to start. It could well be a practical solution for such challenging problems as powering instrumentation that's at 100's of kV potential relative to ground.
From: Joerg on 29 Apr 2010 14:09 Spehro Pefhany wrote: > On Thu, 29 Apr 2010 07:37:08 -0700 (PDT), Johnny5 > <dirtylogicdesigns(a)gmail.com> wrote: > >> Gentlemen, I was curious on any ideas of an opto dc-dc converter >> providing 20mA. Small footprint and heighth.. >> Any ideas? Please and Thank You. >> >> VIN-8-16VDC >> VOUT 5VDC 20mA, > > It's certainly possible (since you don't specify efficiency), but it > probably would cost in the thousands of dollars. JDS Uniphase might be > a place to start. It could well be a practical solution for such > challenging problems as powering instrumentation that's at 100's of kV > potential relative to ground. > Even that I'd try to power magnetically through some porcelain or glass insulation. -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: hamilton on 29 Apr 2010 14:19 On 4/29/2010 12:09 PM, Joerg wrote: > Spehro Pefhany wrote: >> On Thu, 29 Apr 2010 07:37:08 -0700 (PDT), Johnny5 >> <dirtylogicdesigns(a)gmail.com> wrote: >> >>> Gentlemen, I was curious on any ideas of an opto dc-dc converter >>> providing 20mA. Small footprint and heighth.. >>> Any ideas? Please and Thank You. >>> >>> VIN-8-16VDC >>> VOUT 5VDC 20mA, >> >> It's certainly possible (since you don't specify efficiency), but it >> probably would cost in the thousands of dollars. JDS Uniphase might be >> a place to start. It could well be a practical solution for such >> challenging problems as powering instrumentation that's at 100's of kV >> potential relative to ground. > > Even that I'd try to power magnetically through some porcelain or glass > insulation. > That's not opto isolation, its magnetic, right ?? So the OPs request is not feasible. hamilton PS: OK, solar cells maybe.
From: Joerg on 29 Apr 2010 14:58
hamilton wrote: > On 4/29/2010 12:09 PM, Joerg wrote: >> Spehro Pefhany wrote: >>> On Thu, 29 Apr 2010 07:37:08 -0700 (PDT), Johnny5 >>> <dirtylogicdesigns(a)gmail.com> wrote: >>> >>>> Gentlemen, I was curious on any ideas of an opto dc-dc converter >>>> providing 20mA. Small footprint and heighth.. >>>> Any ideas? Please and Thank You. >>>> >>>> VIN-8-16VDC >>>> VOUT 5VDC 20mA, >>> >>> It's certainly possible (since you don't specify efficiency), but it >>> probably would cost in the thousands of dollars. JDS Uniphase might be >>> a place to start. It could well be a practical solution for such >>> challenging problems as powering instrumentation that's at 100's of kV >>> potential relative to ground. >> >> Even that I'd try to power magnetically through some porcelain or glass >> insulation. >> > That's not opto isolation, its magnetic, right ?? > Yes, just meant as a hint that you can do this stuff at high isolation voltages. > So the OPs request is not feasible. > Maybe feasible but it gets expensive. > hamilton > > PS: OK, solar cells maybe. With small footprint and height that can become a challenge. -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM. |