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DC to DC converters

Discussion in 'General Electronics Discussion' started by Moha99, Dec 3, 2011.

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  1. Moha99

    Moha99

    261
    0
    Nov 18, 2011
    Hallo!

    Recently I bought a DC to DC converter to step up my input voltage.

    I bought the RECOM RCD-24-0.70 dc to dc converter listed here in the site:
    http://docs-europe.electrocomponents.com/webdocs/0aba/0900766b80aba022.pdf

    Its the 5th one.

    I want to convert 6volts DC to 12 volts DC using this exact product.

    I tried wiring up a "Dimming control" to increase the voltage but I get nothing... 6 volts In 6 volt out

    And the products states its adjustable output voltage...

    Can anyone help me with this and if you know the solution please clarify the answer.


    Thank you
     
  2. Resqueline

    Resqueline

    2,848
    2
    Jul 31, 2009
    What did you use for a load?
    Oh, and besides, how do you expect stepping up a voltage with a step-down constant-current source/driver/converter?
     
    Last edited: Dec 3, 2011
  3. Moha99

    Moha99

    261
    0
    Nov 18, 2011
    Last edited: Dec 3, 2011
  4. davenn

    davenn Moderator

    13,654
    1,888
    Sep 5, 2009
    Hi Moha

    as Res is indicating your have misunderstood the purpose of this DC - DC converter

    Firstly it is designed for driving LED's with a constant current
    Secondly its a step down converter NOT a step up converter

    read the first line of the description......

    you are NEVER going to get more voltage out than what you put in

    the one you chose... RCD-24-0.70 has an adjustable output up to ~2.5V bvelow the input voltage 4.5V in 2V out; 36V in adjustable up to 33V out

    There are other boost DC - DC converters out there do a google search on those words

    Dave
     
    Last edited: Dec 4, 2011
  5. davenn

    davenn Moderator

    13,654
    1,888
    Sep 5, 2009
    Yes thats a step up regulator but 2 things to consider.....

    1) its surface mount and unless you have the soldering station capable of doing SMD work you are going to find it really difficult to work with
    2) it only has 70mA current capability

    you havent said what you want to use the converter for but this may be way too low in current capability.

    You would be much better off with a LM1577/2577 switching regulator, it can on its own do up to 800mA (0.8A)
    google the datasheet :)

    cheers
    Dave
    g
     
  6. Moha99

    Moha99

    261
    0
    Nov 18, 2011

    Aha thanks!

    Im looking for any boost converter that will increase an input voltage of 6VOLTS/DC to any voltage to power some dc appliances btw they are all under 1 AMP so its fine.

    I found a group of Dc to Dc converters the maximum output current is not stated or even the minimum because the voltage output is adjustable.

    So I just need voltage of 12 and above.

    I found theses converters:
    http://sa.rsdelivers.com/product/li...-adj-3a-su-boost-dc-dc-converter/5060748.aspx

    and this too

    http://sa.rsdelivers.com/product/li...-adj-3a-su-boost-dc-dc-converter/5060748.aspx


    Which are pretty good for me.

    What do you think?

    Keep in mind I don't need much amperage. 500mA is good 700mA is better 1Amp is perfect.

    I think one of them could get me close to the requirements.
     
  7. davenn

    davenn Moderator

    13,654
    1,888
    Sep 5, 2009
    ok those were both the same link :)

    but yes you are on the right track now :)

    have fun and report back on how you got on

    cheers
    Dave
     
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