+12 Volt DC to -12 Volt DC

Discussion in 'Power Electronics' started by kavin6995, Jul 9, 2018.

  1. kavin6995

    Thread Starter New Member

    Jul 9, 2018
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    Hi,
    I am testing a project in that i have to convert or seperate +12v battery voltage into +12v and -12v... If there is any device or IC for it please suggest.
    Thanks.
     
  2. ericgibbs

    Moderator

    Jan 29, 2010
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    hi kavin,
    Welcome to AAC.
    What sort of current levels are required for the +/-12 Vout.?
    E
     
  3. kavin6995

    Thread Starter New Member

    Jul 9, 2018
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    1 - 2 Amps
     
  4. kavin6995

    Thread Starter New Member

    Jul 9, 2018
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    Another one important thing here i am hoing to give the -12 and +12 as a pulse for 2 devices in a single time throught the battery
     
  5. ericgibbs

    Moderator

    Jan 29, 2010
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  6. kavin6995

    Thread Starter New Member

    Jul 9, 2018
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    I am going to install two devices in a car.. one device needs +ve pulse and second need -ve pulse.. for the pulses i am going to take supply from the battery... For giving pulses i will fix a single push button in the car... if i press the push button both the device should get the pulses.
     
  7. ericgibbs

    Moderator

    Jan 29, 2010
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    Why don't you use the 12V car battery as the +12V pulse source and purchase an isolated +12Vby to -12V converter for the -12V pulse.?
     
  8. kavin6995

    Thread Starter New Member

    Jul 9, 2018
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    Ok...its fine... but if there is any simple solution for it... like using any diode or ic
     
  9. ericgibbs

    Moderator

    Jan 29, 2010
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    hi,
    The problem is to convert from an isolated +12V to a -12V at say 2Amps will require additional circuitry, not just the switcher IC.
    You can buy ready built modules from eBay etc... I will check it out and post.
    E
     
  10. kavin6995

    Thread Starter New Member

    Jul 9, 2018
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    upload_2018-7-9_14-21-11.png

    this is the circuit what is the solution
     
  11. kavin6995

    Thread Starter New Member

    Jul 9, 2018
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    Ok but dont need for amps rating first tell me a solution for the conversion for voltage
     
  12. ericgibbs

    Moderator

    Jan 29, 2010
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    What is the -12V pulse driving.? and is one connection of the device being pulsed, connected to the vehicle chassis.?
     
  13. kavin6995

    Thread Starter New Member

    Jul 9, 2018
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    Sorry... i cannot understand
     
  14. ericgibbs

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    Jan 29, 2010
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    What is the -12V pulse output connected too.?
     
  15. kavin6995

    Thread Starter New Member

    Jul 9, 2018
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    to a device for giving tigger to it
     
  16. ericgibbs

    Moderator

    Jan 29, 2010
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    Look at this image.
     
  17. kavin6995

    Thread Starter New Member

    Jul 9, 2018
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    The device may like DVR or GPS units or like some sensors
     
  18. MrChips

    Moderator

    Oct 2, 2009
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    The simple solution is to get a second 12V battery.
     
  19. kavin6995

    Thread Starter New Member

    Jul 9, 2018
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    By using zener diode if there is any option
     
  20. ericgibbs

    Moderator

    Jan 29, 2010
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    A zener is not an option for the -12V.
    To get a circuit design, you need to have a clear specification of the requirements of your project.
     
    kavin6995 likes this.
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