DC DC converter

Discussion in 'General Electronics Chat' started by pradeeba, Oct 28, 2008.

  1. pradeeba

    Thread Starter Active Member

    Feb 27, 2008
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    Is there any IC which works from 15VDC to 265 VDC DC to DC converter wherein my output is 2W(12V)? i need an isolated power supply.
     
  2. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    I started to respond but realized I had on idea of what you needed. My take is you need is 15V DC to 12V DC,output isolated from input ? Now I get it just like you said; a wide range DC input to 12 V DC. This a thought not a suggestion; here is a switching ps 100-240 V ac in,12V @ 300ma out, if you tapped in after ac rectification might cover 75-260 V DC. how low you could go ,dont know. It will be hard to find off the shelf. Best wate for a better answer.
     
  3. Wendy

    Moderator

    Mar 24, 2008
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    Did you really mean 265VDC?
     
  4. pradeeba

    Thread Starter Active Member

    Feb 27, 2008
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    Can u pls brief the answer.
     
  5. pradeeba

    Thread Starter Active Member

    Feb 27, 2008
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    yes input range is from 15VDC to 265VDC
     
  6. John Luciani

    Active Member

    Apr 3, 2007
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    That is a very wide range for a converter. The input range of typical DC-DC converters span 2:1 or 3:1. I would surprised if you could find an efficient 2W converter with that input range.

    (* jcl *)
     
  7. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    I mis stated thought: connect DC supply to input of switching PS [ check input with low voltage ohm meter first. Open ckt probabily means a diode bridge input which will work ] With a 100-240 V AC input PS ,12V DC out,it took 72V DC to start, on dropping V gradually output held at 12V down to 15 V DC input. Might use two inverters, one for low range and one for high.
     
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