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Class D IC Recommedation for Sub

Discussion in 'Electronic Design' started by D from BC, Jul 21, 2007.

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  1. D from BC

    D from BC Guest

    My subwoofer amp blew sometime ago. Happened on a freak hot day
    sometime ago. I think it reached 38C.
    I designed it for 25C ambient. ...oopss

    The bridged amp modules probably blew.. It was a homebrew project.
    For something new...
    I'd like to try out a Class D IC and power it with a smps.

    Any thoughts or recommendations on Class D amp modules for sub
    D from BC
  2. A modest subwoofer amp has the output power of several hundred Wt. There are
    no ICs rated for that kind of power. There are many ICs for class D
    modulators (check Zetex website, for example). You will also need the
    external drivers to control the output high voltage high current FET stage.

    Vladimir Vassilevsky
    DSP and Mixed Signal Consultant
  3. D from BC

    D from BC Guest

  4. D from BC

    D from BC Guest
    With schematic for 25W mono amp..

    D from BC
  5. Make it simple, omit the output filter at all. The inductance of a
    speaker is enough. A radio will be jammed anyway. Who cares about EMC ;-)

    Vladimir Vassilevsky

    DSP and Mixed Signal Design Consultant
  6. D from BC

    D from BC Guest

    I make my own inductors..
    I'll have to chose the correct core type and size for the Class D
    output filters.
    D from BC
  7. PeteS

    PeteS Guest

    TI does class D controllers rated at up to 300W, amongst others. I've
    used a couple of their lower power parts and they worked fine for me. I
    have no doubt other vendors parts perform as well.

    One does need to be careful of the output filter parts, of course ;)


  8. Set your PC's clock right, ya goddamned retard. You have been told
    this several times in the past.

    How can you be that fucking stupid?
    Except that is NOT when you posted it, idiot.
  9. Lamey

    Lamey Guest

    That bother you Prongboi?
    Dealing with you?
    It does bother you.



    Usenet lits score:

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  10. Rich Grise

    Rich Grise Guest

    Hooray! ;-D

  11. D from BC

    D from BC Guest

    I tried out my sub amp at full power one time. It rattled the wall
    pictures,cutlery in the kitchen drawers rattled, stuff fell off the
    shelves and the neighbors complained.
    Pretty good for just bridged 68W National modules.
    D from BC
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