A kind of modified node method with the power supply circuits of power factor correction

A kind of modified node method with the power supply circuits of power factor correction

  • CN 101,657,054 B
  • Filed: 02/18/2009
  • Issued: 01/20/2016
  • Est. Priority Date: 02/18/2009
  • Status: Active Grant
First Claim
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1. one kind has the modified node method of the power supply circuits of power factor correction, these power supply circuits comprise power supply circuits output and voltage negative feedback circuit, power supply circuits output comprises hot end and cold end, described hot end refers to that the hot end (A '"'"') of the efferent duct (T) in described power supply circuits exports the terminal of high potential through diode (VD1), voltage negative feedback circuit comprises first feedback circuit and the second feedback circuit of connecting successively from hot end to cold end, the tie point of the first feedback circuit and the second feedback circuit forms the feedback signal output of described voltage negative feedback circuit output feedback signal, it is characterized in that,In described modified node method, replace the first feedback circuit with the light source branch road comprising constant current light source, with determining that the resistance branch of light source branch road operating current replaces the second feedback circuit.

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