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AC/DC Adapters

Discussion in 'Electronic Basics' started by Boot, Aug 12, 2005.

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  1. Boot

    Boot Guest

    I'm trying to get an AC adapter for a sega megdrive, would it need to
    fit the exact specifications? (9-10V 850mA DC)Im finding it had to find
    an adaptor with these exact specifications.

    Thanks, Boot.
  2. Rodney

    Rodney Guest

    You should stay at the same voltage range but it shouldn't hurt if it had a
    higher current rating.
  3. Tom Biasi

    Tom Biasi Guest

    The voltage should be kept in the recommended rage but the current rating
    can be higher.
  4. Rich Grise

    Rich Grise Guest

  5. JeffM

    JeffM Guest

  6. Bill

    Bill Guest

    Be aware that if the AC adapter is unregulated you don't want to get
    too much higher in current than what it called for. If you do you may
    find that the voltage supplied to your load is higher than what the
    circuitry is designed to handle.

  7. John Fields

    John Fields Guest

    If it needs to be 9-10V out from no-load to full load, your best bet
    would be to buy a regulated supply. Here are a couple from CUI
    Stack / Digi-Key that'll work for you:

    9VDC ±5%, 1300mA, $15.88 Digi-Key P/N T460-P5P-ND

    9VDC ±2%, 1100mA, $19.72, Digi-Key P/N T363-P5P-ND

    Don't worry about the current, that's the maximum that can be taken
    from the supply without the output voltage going out of spec. If
    you take less, the adapter will just run cooler and the output
    voltage _might_ rise to 5% or 2% above 9 volts, depending on which
    one you get.
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