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High-efficiency adaptive DC/AC converter

  • US 20050030776A1
  • Filed: 09/07/2004
  • Published: 02/10/2005
  • Est. Priority Date: 07/22/1999
  • Status: Active Grant
First Claim
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1. A DC to AC cold cathode fluorescent lamp inverter circuit comprising:

  • a plurality of switches for selective coupling to a voltage line;

    a transformer coupled to said switches for increasing voltage;

    a feedback signal line receiving a feedback signal indicative of a current through a cold cathode fluorescent lamp load; and

    a feedback control circuit coupled to said feedback signal line and said switches for adjusting the power delivered to said load only if said current is above a predetermined threshold.

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