Voltage Drop Alternatives for Analog Power Circuit.

Discussion in 'The Projects Forum' started by witssq, May 17, 2010.

  1. witssq

    Thread Starter Active Member

    Mar 29, 2009
    48
    0
    I would like to design Power supply with very stable and low ripple for analog measurement application.

    For regulation from +15 to +5V, from -15 to -5V 3A, about 3Vx3A voltage drop is needed for too much heat.

    Please advice me a better alternative for voltage drop under stabilty and ripple basis.
    Which one would be better among (1)- wirewound resistor and (2) diodes alternative as attached?
    Or does any other better alternatives exist?

    Awaiting kind response,
    Thanks.
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    Replace the whole circuit with a switching regulator which has efficiency up to 95%.
     
  3. retched

    AAC Fanatic!

    Dec 5, 2009
    5,201
    312
    Agreed. For the price of the wirewounds that are high enough wattage to handle the conversion, and the linear regulator, you could put a nice cool switcher together.
     
  4. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    You'll get ripple with a switcher, but you can add on low-pass filter stages to the output in order to reduce/eliminate the ripple.
     
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