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DC DC Converter 100V to 10V

Started by panfilero February 7, 2012
can anyone suggest a smps topology or an off the shelf component that
could convert 100V DC (@ .2A) to 10V DC out?

much thanks
On Tue, 07 Feb 2012 10:35:34 -0800, panfilero wrote:

> can anyone suggest a smps topology or an off the shelf component that > could convert 100V DC (@ .2A) to 10V DC out? > > much thanks
Try searching on "off line regulator". I found one (MC33363) in about 30 seconds looking on the On Semi web site. I dunno if it's any _good_. But I found it. -- My liberal friends think I'm a conservative kook. My conservative friends think I'm a liberal kook. Why am I not happy that they have found common ground? Tim Wescott, Communications, Control, Circuits & Software http://www.wescottdesign.com
On Tue, 7 Feb 2012 10:35:34 -0800 (PST), panfilero
<panfilero@gmail.com> wrote:

>can anyone suggest a smps topology or an off the shelf component that >could convert 100V DC (@ .2A) to 10V DC out? > >much thanks
This worked great: ftp://jjlarkin.lmi.net/ESM_power.pdf and would scale to 100 volts easily. The major difficulty with rolling your own would be the magnetics. John -- John Larkin, President Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation
"panfilero" <panfilero@gmail.com> wrote in message 
news:50e10e75-5c2b-41b6-a739-2a5fd231e0a1@n12g2000yqb.googlegroups.com...
> can anyone suggest a smps topology or an off the shelf component that > could convert 100V DC (@ .2A) to 10V DC out? > > much thanks
In the UK, the mains is nominally 230V - inspection of the spec label on many power units will reveal that they can operate from something like; 85 - 265, so they are for all intents and purposes "universal". You should bear in mind though, that the 85VRMS as the lower limit is about 120V by the time it emerges from the rectifier/reservoir - but who knows, you might find a PSU that gets away with it. 10V is a bit odball, if you can't find that voltage double up a couple of 5V USB wall-warts.
On 2/7/2012 12:23 PM, John Larkin wrote:
> On Tue, 7 Feb 2012 10:35:34 -0800 (PST), panfilero > <panfilero@gmail.com> wrote: > >> can anyone suggest a smps topology or an off the shelf component that >> could convert 100V DC (@ .2A) to 10V DC out? >> >> much thanks > > This worked great: > > ftp://jjlarkin.lmi.net/ESM_power.pdf > > and would scale to 100 volts easily. The major difficulty with rolling > your own would be the magnetics. > > John >
This just in from TI: http://www.ti.com/product/lm5017?DCMP=sva_lm5017&HQS=lm5017pf-emb&sp_rid_pod4=MTIxNjM1NjY3NDMS1&sp_mid_pod4=38772728
On Tue, 07 Feb 2012 14:12:23 -0700, hamilton <hamilton@nothere.com>
wrote:

>On 2/7/2012 12:23 PM, John Larkin wrote: >> On Tue, 7 Feb 2012 10:35:34 -0800 (PST), panfilero >> <panfilero@gmail.com> wrote: >> >>> can anyone suggest a smps topology or an off the shelf component that >>> could convert 100V DC (@ .2A) to 10V DC out? >>> >>> much thanks >> >> This worked great: >> >> ftp://jjlarkin.lmi.net/ESM_power.pdf >> >> and would scale to 100 volts easily. The major difficulty with rolling >> your own would be the magnetics. >> >> John >> > >This just in from TI: > >http://www.ti.com/product/lm5017?DCMP=sva_lm5017&HQS=lm5017pf-emb&sp_rid_pod4=MTIxNjM1NjY3NDMS1&sp_mid_pod4=38772728 >
If you don't need isolation, I think National has some high-voltage SimpleSwitchers, too. -- John Larkin, President Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation
panfilero <panfilero@gmail.com> wrote:

>can anyone suggest a smps topology or an off the shelf component that >could convert 100V DC (@ .2A) to 10V DC out?
Look for an 115V AC/DC converter with +/-5V outputs. -- Failure does not prove something is impossible, failure simply indicates you are not using the right tools... nico@nctdevpuntnl (punt=.) --------------------------------------------------------------
"panfilero"  wrote in message=20
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> can anyone suggest a smps topology or an off the shelf component > that could convert 100V DC (@ .2A) to 10V DC out?
> much thanks
If a current regulated output of 50 mA is OK, there is a three-terminal=20 device http://www.supertex.com/pdf/datasheets/HV9922.pdf which uses only = about 6 external components, and cost is less than a dollar. Also look = at: http://www.supertex.com/pdf/datasheets/HV9910B.pdf Supertex has other high voltage modules that may work for your = application. An ordinary switching supply might be able to run on 100VDC. If outputs = are=20 isolated, two 5VDC supplies could be connected in series for 10V. Paul=20
On 2/7/2012 10:35 AM, panfilero wrote:
> can anyone suggest a smps topology or an off the shelf component that > could convert 100V DC (@ .2A) to 10V DC out? > > much thanks
I'd just buy a 9V or 12V wall wart and change the sense resistor to get 10V. There exist adjustable laptop power supplies that can do 10V without having to open 'em up. These works well: Has plug-in sense resistors http://www.vellemanusa.com/products/view/?country=us&lang=enu&id=351445 This one has a switch http://azsurplus.com/index.php?main_page=product_info&cPath=1_14&products_id=547 But they're available under many brand names. mike
On Tue, 07 Feb 2012 10:35:34 -0800, panfilero wrote:

> can anyone suggest a smps topology or an off the shelf component that > could convert 100V DC (@ .2A) to 10V DC out? > > much thanks
It's an interesting set of assumptions that I'm seeing in the replies to this. Are you doing a onesie hobbyist hack-together, or are you designing a product? For a onesie hobbyist hack-together, the suggestions about wall- warts (the newer slim-line ones) may be the way to go. -- My liberal friends think I'm a conservative kook. My conservative friends think I'm a liberal kook. Why am I not happy that they have found common ground? Tim Wescott, Communications, Control, Circuits & Software http://www.wescottdesign.com