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Class D amps and Switch mode power supplies.

Discussion in 'Electronic Basics' started by Chris Berry, Jun 4, 2005.

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  1. Chris Berry

    Chris Berry Guest

    Hi Folks,

    I'm looking for a good place to get acquainted with Class D amps and Switch
    mode power supply design.

    My key interest areas are high power (500W+) Audio/PA amps and power
    supplies for both these amps, class AB and valve amps (if that's at all

    I'd like to start on a couple of projects such as a 40 - 0 - -40V power
    supply for my 200W practice amp and maybe build a 500W+ amp if the
    weight/performance/cost warrants it.

    I hope this is the right forum for discussing this - otherwise, tell me
    where to go ;-)
  2. Guest

    Try these companies:

    A&I Robotics, Acoustic Reality, Apogee Technology, B&O, Behringer, Bel
    Canto, Champion Microelectronic (Taiwan), Compact Power Company,
    D2Audio, Deton, Flying Mole, JAM Tech, JRC, MAXIM, Micro Analog
    Systems, Microsemi/Linfinity,
    Mitsubishi, Motorola, Mueta, National Semiconductor, NeoFidelity,
    nPhysics, Orvelle Technologies, Philips, Power Physics, Power Soft,
    Pristine Audio, PS Audio, Pulsus, PWM Systems, Radical Electronics,
    Rebix, Sanken, Sanyo,
    Sound Labs Group / ZAPpulse, Soundmatters, Spectron, ST
    Microelectronics, Stewart Audio, Texas Instruments, Tripath, Zetex

    Some of the above, like Texas instruments and Tripath, make some chips
    for what you want to do. Their application notes are very informative.
    Other companies in the above list have amplifier products (PWM Systems,
    Power Physics) and there is some useful data on their websites.


    Frank Raffaeli
  3. Ban

    Ban Guest

    extensive list, but some addition:
    I use the Hypex UcD400 module . But they do not have
    SMPS, they sell normal transformer based supplies though. +/-40V is too low
    for it, I use +/-60V.
    Valve amps are not high power and won't sell for a 150$(w/o supply) either.
  4. Chris Berry

    Chris Berry Guest

    Thanks for the replies, I'm well on my way now.
    WRT valves, you can get a start for under $150 (without PSU that is)
    Oh... There's the small matter of the output transfoermer as well... you can
    get lucky looking round for some junk though.
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