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Step down from 0 to 48 DC to 0 to 10 DC

Discussion in 'Electronic Design' started by Cosmo, Oct 23, 2006.

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  1. Cosmo

    Cosmo Guest

    Silly question I guess. But i'm looking for a simple way to step down
    from 48 volts to 10 volts DC. I can only use basic components. I would
    like to use the 48 volts to feed directly into a PID controller but it
    appears that the op amps don't like it, something that I can understand
    seeing that there supply voltage is only 15Volts.

  2. You don't state what maximum current you require, if its a few mA a
    resistor might work, otherwise LM317, with a few proviso's about max
    in V and min V out problems ( ie how many volts it can drop)

  3. Guest

    Use a standard smps controller chip and use the "typical application" for a
    quick solution.

    As for the op-amp use a resistor divider to handle 48V.

    Don't forget voltage variations that may occour..
  4. John Fields

    John Fields Guest

  5. ehsjr

    ehsjr Guest

    If your current requirement is low, use an LM317HV.
    If it is high, add a pass transistor. If you don't
    know how, see the datasheet.

  6. jasen

    jasen Guest

    if you want the reduced voltage for a high impedance input
    use a voltage divider.

    if you need it to power a device use a voltage regulator of some sort.

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