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DC 5V to DC 15V question — Parallax Forums

DC 5V to DC 15V question

ArchiverArchiver Posts: 46,084
edited 2001-08-31 23:59 in General Discussion
a 5 volt to 15 volt power supply module



(1 part)







richard

Original Message
From: "Jay Hanson" <j@q...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, August 31, 2001 2:10 PM
Subject: [noparse][[/noparse]basicstamps] DC 5V to DC 15V question


> What's the best (least components) way to boost DC 5V to DC 15V @ < .1A?
>
> Jay
>
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Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-08-31 19:01
    the two sitting in front of me are by lambda and by TDK
    you should be able to get them at an electronic surplus place for $1-$5
    each

    Sure you could make an oscillator, chop the dc, run it through a
    transformer, rectify
    it and then regulate it. That is only 20 components, a day of design and a
    day of troubleshooting.

    Id go the surplus route rather than do engineering design work for $0.31/hr
    ;-)

    richard

    Original Message
    From: "Jay Hanson" <j@q...>
    To: <basicstamps@yahoogroups.com>
    Sent: Friday, August 31, 2001 2:31 PM
    Subject: RE: [noparse][[/noparse]basicstamps] DC 5V to DC 15V question


    > >a 5 volt to 15 volt power supply module
    >
    > Who makes them?
    >
    > Any other choices (a chip and a couple of capacitors)?
    >
    > Jay
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the Subject and
    Body of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2001-08-31 19:12
    I don't know what you are building. I thought this was a prototype or a one
    of a kind device.

    The modules I have output 15 volts at 100 ma with 5 volt input.
    I noticed the chips you found are 50 ma output - is that the problem?
    $2.45 seem cheap to me.

    I use mine for +/- supplies for op-amps
    I don't know anything about nmos fets

    richard



    Original Message
    From: "Jay Hanson" <j@q...>
    To: <basicstamps@yahoogroups.com>
    Sent: Friday, August 31, 2001 2:49 PM
    Subject: RE: [noparse][[/noparse]basicstamps] DC 5V to DC 15V question


    > On second thought, perhaps I wasn't clear in my initial post. I am
    > designing an automotive circuit and need to boost 5V to 15V to bias some
    > nmos fets.
    >
    > The only chip I found that came close to what I was looking for was a
    > MAX633.
    >
    > http://dbserv.maxim-ic.com/quick_view2.cfm?qv_pk=1379
    >
    > I believe this part is at least ten years old. Is there anything newer
    and
    > better?
    >
    > Jay
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the Subject and
    Body of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2001-08-31 20:10
    What's the best (least components) way to boost DC 5V to DC 15V @ < .1A?

    Jay
  • ArchiverArchiver Posts: 46,084
    edited 2001-08-31 20:31
    >a 5 volt to 15 volt power supply module

    Who makes them?

    Any other choices (a chip and a couple of capacitors)?

    Jay
  • ArchiverArchiver Posts: 46,084
    edited 2001-08-31 20:49
    On second thought, perhaps I wasn't clear in my initial post. I am
    designing an automotive circuit and need to boost 5V to 15V to bias some
    nmos fets.

    The only chip I found that came close to what I was looking for was a
    MAX633.

    http://dbserv.maxim-ic.com/quick_view2.cfm?qv_pk=1379

    I believe this part is at least ten years old. Is there anything newer and
    better?

    Jay
  • ArchiverArchiver Posts: 46,084
    edited 2001-08-31 21:11
    --- Jay Hanson <j@q...> wrote:
    > On second thought, perhaps I wasn't clear in my
    > initial post. I am
    > designing an automotive circuit and need to boost 5V
    > to 15V to bias some
    > nmos fets.

    you could build a "boost converter" to easily
    accomplish 15V @ .1A with relativley low ripple. it
    would only require a couple of parts, but the inductor
    may be hard to find(might have to wind your own). for
    the specifics consult any power electronis text, the
    net of course even has sites that will design it for
    you after some data is input, or even the little radio
    shack book "power supplies" has a nice example
    utilizing feedback to keep the output ripple to set
    limits.


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  • ArchiverArchiver Posts: 46,084
    edited 2001-08-31 23:41
    I can not find anyone who has the MAX633 in stock. So I need another chip
    or module.

    I have not found any other chips that are 5V to 15V (Lambda only seems to go
    to 12V). What is the manufacturer and the part number of the 5V to 15V
    modules that you have?

    Jay
    Original Message
    From: Richard Friedrich [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=xM6utZ1FWGiUyMpzXBImzgFfKgt4H5zAA-W89TskCsBHpON4AYsCMZ871P8Nme_fTitXOzEe-pDaIcZwmPRdqwA]rfriedrich@a...[/url
    Sent: Friday, August 31, 2001 8:13 AM
    To: basicstamps@yahoogroups.com
    Subject: Re: [noparse][[/noparse]basicstamps] DC 5V to DC 15V question


    I don't know what you are building. I thought this was a prototype or a one
    of a kind device.

    The modules I have output 15 volts at 100 ma with 5 volt input.
    I noticed the chips you found are 50 ma output - is that the problem?
    $2.45 seem cheap to me.

    I use mine for +/- supplies for op-amps
    I don't know anything about nmos fets

    richard



    Original Message
    From: "Jay Hanson" <j@q...>
    To: <basicstamps@yahoogroups.com>
    Sent: Friday, August 31, 2001 2:49 PM
    Subject: RE: [noparse][[/noparse]basicstamps] DC 5V to DC 15V question


    > On second thought, perhaps I wasn't clear in my initial post. I am
    > designing an automotive circuit and need to boost 5V to 15V to bias some
    > nmos fets.
    >
    > The only chip I found that came close to what I was looking for was a
    > MAX633.
    >
    > http://dbserv.maxim-ic.com/quick_view2.cfm?qv_pk=1379
    >
    > I believe this part is at least ten years old. Is there anything newer
    and
    > better?
    >
    > Jay
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the Subject and
    Body of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >


    To UNSUBSCRIBE, just send mail to:
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  • ArchiverArchiver Posts: 46,084
    edited 2001-08-31 23:53
    Both of these places have dc to dc concerters

    www.mouser.com or www.alliedelec.com

    Original Message
    From: Jay Hanson <j@q...>
    To: <basicstamps@yahoogroups.com>
    Sent: Friday, August 31, 2001 12:10 PM
    Subject: [noparse][[/noparse]basicstamps] DC 5V to DC 15V question


    > What's the best (least components) way to boost DC 5V to DC 15V @ < .1A?
    >
    > Jay
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the Subject and
    Body of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2001-08-31 23:59
    How much current are you going to need?

    Original Message
    From: Jay Hanson <j@q...>
    To: <basicstamps@yahoogroups.com>
    Sent: Friday, August 31, 2001 12:49 PM
    Subject: RE: [noparse][[/noparse]basicstamps] DC 5V to DC 15V question


    > On second thought, perhaps I wasn't clear in my initial post. I am
    > designing an automotive circuit and need to boost 5V to 15V to bias some
    > nmos fets.
    >
    > The only chip I found that came close to what I was looking for was a
    > MAX633.
    >
    > http://dbserv.maxim-ic.com/quick_view2.cfm?qv_pk=1379
    >
    > I believe this part is at least ten years old. Is there anything newer
    and
    > better?
    >
    > Jay
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the Subject and
    Body of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
    >
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