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Power device for multiple light sources with switching and charge pump circuit

  • US 7,443,050 B2
  • Filed: 07/21/2006
  • Issued: 10/28/2008
  • Est. Priority Date: 07/22/2005
  • Status: Expired due to Fees
First Claim
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1. A power device comprising:

  • a switching regulator havinga switching element connected to a transformer or a coil, anda control circuit forgenerating an on/off signal to control the switching element, andsupplying an input voltage from a power source to a first load by the on/off operation of the switching element in accordance with the on/off signal; and

    a charge pump circuit foraccumulating an electric charge in accordance with the input voltage from the power source during an operation for turning on the switching element, anddischarging the accumulated electric charge to a second load during an operation for turning off the switching element.

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