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Thread: OPUS surviving crank

  1. #1
    Raw Wave
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    Jun 2003
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    OPUS surviving crank

    Does anyone know how the OPUS survive a crank without a tank?

    I think it work like this :

    The incomming voltage is regulated down to 12V. This 12V is then fed to a step-up regulator. The step-up should be able to operate down to 6V lets say and above. The first regulator ensure no more than 12V is passed to the PC, the second regulator step-up the voltage back to 12V if needed.

    right? wrong?

    Anyone knows how the circuit works? chips, regulator it uses?

  2. #2
    Maximum Bitrate PTCruiser's Avatar
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    Could be:

    a step up then step down regulator.

    Or a step up the a low drop out reg.

    Or a flyback regulator
    Epia M9000, lili 7" vga&touch & 2xTM-7002S compo, camera with reversed image, 2.5" 60 GB, 256Mb DDR, Opus 90W, GPS usb... AND MEDIACRUISER of course!

  3. #3
    Raw Wave
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    Thanks PTCruiser

    I see you are designing your own DC-DC with shutdown controller. Are you basing your one on a PIC microcontroller?

  4. #4
    Maximum Bitrate PTCruiser's Avatar
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    oups I have to chg my signature!

    This was a std PSU with a PIC shutdown ctrl inside...

    Everthing worked fine....(+5V,+3.3V,12V & shutdown)
    BUT never booted my EPIA M (Sproogy & epia M is a long story)

    I ordered a opus 90W now....

    Hope I'll find some time to check what's wrong with sproogy & epia M one day
    Epia M9000, lili 7" vga&touch & 2xTM-7002S compo, camera with reversed image, 2.5" 60 GB, 256Mb DDR, Opus 90W, GPS usb... AND MEDIACRUISER of course!

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