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DC voltage decrease

Discussion in 'Electronic Basics' started by muhaha, May 24, 2004.

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  1. muhaha

    muhaha Guest

    Is there a way to cut the 9V DC supply to 3V without wasting 6V at a regulator ?
    I'm looking for most mAh i can get.

    Thanks.
     
  2. Switching regulators are precisely for this. They do not waste excess
    voltage, but convert one voltage to another, somewhat like a
    transformer does for AC.

    Read the basics here:
    http://www.national.com/appinfo/power/files/f5.pdf
     
  3. babuchemy

    babuchemy

    1
    0
    Jul 16, 2009
    Car 12VDC power to 19VDC suitable for laptop charging

    Hello
    I would like to convert 12 VDC power supply in the cigerette lighter to 19V DC to be able to charge a laptop battery.
    What is the best method to step up?
    regards
    Babu
     
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