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High Efficiency Inductor-less Off-Line LED Driver

  • US 20130257277A1
  • Filed: 07/30/2012
  • Published: 10/03/2013
  • Est. Priority Date: 03/30/2012
  • Status: Active Grant
First Claim
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1. A SSL light bulb assembly comprising:

  • a SSL device;

    a driver circuit, converting supply electricity received through an electrical connection module into a controlled drive current for the SSL device, comprising;

    a first power converter converting a varying input voltage at an input of the power converter into an output voltage at an output of the power converter supplying the output voltage to the solid state lighting, comprising;

    one or more capacitors;

    a plurality of switches coupling said one or more capacitors with one another, with the input and/or with the output of the power converter according to a plurality of configurations; and

    a control unit operating the power converter in a plurality of operational modes providing a corresponding plurality of different conversion ratios between the input voltage and the output voltage of the power converter, anda current source at the output of the first power converter, supplying a constant current to the SSL device, when the SSL device is coupled to the output of the first power converter.

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