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Thread: Powerful single supply AMP

  1. #1

    Powerful single supply AMP

    Hi,
    in the last months i worked on a Fullbridge amp with a single supply.
    This is the Result:

    DSC07243.JPG

    First i tried it with Sawtooth + Comparator - PWM, but it didnt work so well,
    because there was a hearable noise.
    And i dint find out where the problem was.
    Then i changed the Modulator to self oscillating, with LT1016.
    Now there is no more noise i can hear (oscillating at 280kHz).

    Only problem was loud noise, when i connected my phone to play music.
    But increasing the resistor values at the input solved the problem.

    Two IR2110 are driving 4 IRFB5620 at ca. 50V.
    I will use it to drive 300W 4ohm active speakers.
    And also for a sub (450W 8 ohm), but with just 50-100khz, and maybe IRFP250.

    With proper Fets and Power Supply it should deliver plenty of power... (maybe 1kW at 4ohm)
    The board is only 7cm * 10cm

    Regards
    Plasma

  2. #2
    @Plasma,

    Looks very nice start.

    My 2KW class-d size 9.4CM x12CM, self oscillating delivering 130VRMS @ 4 Ohms running at 230VDC

    Hope that helps


    2KW.jpg
    www.diysmps.com & www.Micro-Audio.com

  3. #3
    very high power and very small amp

  4. #4
    What kind of smps would you consider me to add to this amp?

    An unregulated smps with IR2153
    or regulated with TL494+gate drive Transformer?

  5. #5
    Quote Originally Posted by plasma View Post
    What kind of smps would you consider me to add to this amp?

    An unregulated smps with IR2153
    or regulated with TL494+gate drive Transformer?
    Regulated will give you better bass results for sure
    www.diysmps.com & www.Micro-Audio.com

  6. #6
    Hi!
    If use TAS5634+LT1016 - you have OCP, UVLO, OTW, etc... Output power over 300 watts
    And small size PCB)))
    http://forum.vegalab.ru/showthread.php?t=66284 see this.
    Last edited by irs20957; 09-04-2018 at 09:45 PM.

  7. #7

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