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Thread: class h 3 tier 2ohms stable

  1. #11
    Hello Steven
    greetings build HD3600 MK4 HD CLASS much simpler to DIY

    warm regards
    Andrew

  2. #12

  3. #13
    diysmps Senior Member
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    Quote Originally Posted by Rookiex View Post
    Hello Steven
    greetings build HD3600 MK4 HD CLASS much simpler to DIY

    warm regards
    Andrew
    hi andrew . thanks for your quick reply , do you have the pcb files and schematic of the 3600 amp .

    also where can i get the heat sinks at a good price??

  4. #14
    diysmps Senior Member
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    hi all i have settled on discreet mosfet driver using mmbt 3904&4403 as gdt, and three pairs output bjt.
    on the two tier version. the three tier one i will use lm 311 . my choices are based on availabillity of materials.

    it shall be a two tier class h, the voltage maxx shall be +/-45 , 90 vlt dc
    the fets i will use either irf ,z44,z46,z48, 1010, 1407 e.t.c

    please all check if there is any errors on schematic or what can be improved to the schematic. thanking you all in advance diy stewin
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  5. #15
    diysmps Senior Member
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    Quote Originally Posted by Rookiex View Post
    Hello Steven
    greetings build HD3600 MK4 HD CLASS much simpler to DIY

    warm regards
    Andrew
    hi rookiex thanks for your reply , but the component count is too many and the board is too big . better perfecting class d.

  6. #16
    diysmps Senior Member
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    hi all crew , i saw apex td/hd 1800 and wanted to go the td/hd way, until the output graph measures were posted
    i remembered stability issues i faced with hi voltage class d amps +/-40v to +/-85v (except the class d 200 watts using two mosfets which is a very stable amp like a class ab http://www.diysmps.com/forums/showth...t-cheap/page37 )

    so i settled with lm311 as gate drivers thanks to wg-ski of diy audio , so all files are below have fun all

    the board still working on the layout
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