• Patent Title: Light emitting diode driving circuit and light emitting diode lighting device
  • Application No.: US15567208
    Application Date: 2016-03-15
  • Publication No.: US10470268B2
    Publication Date: 2019-11-05
  • Inventor: Xusheng YangKaichun Huang
  • Applicant: LEDVANCE GmbH
  • Applicant Address: DE Garching Bei München
  • Assignee: LEDVANCE GMBH
  • Current Assignee: LEDVANCE GMBH
  • Current Assignee Address: DE Garching Bei München
  • Agency: Hayes Soloway PC
  • Priority: CN201510184396 20150417
  • International Application: PCT/EP2016/055519 WO 20160315
  • International Announcement: WO2016/165893 WO 20161020
  • Main IPC: H05B33/08
  • IPC: H05B33/08
Light emitting diode driving circuit and light emitting diode lighting device
Abstract:
The LED driving circuit includes: a detecting circuit that detects whether an input current of the driving circuit is low or high frequency; a first stage converter that converts the input of the driving circuit to provide a DC power suitable for the LED; a first feedback loop that is activated by a low frequency current, to convert a current from a LED load to a feedback voltage and feed it back to the first stage converter, wherein in the first feedback loop, the feedback voltage changes as a function of the current of the LED load; and a second feedback loop that is activated by high frequency current, to convert the current from the LED load to the feedback voltage and feed it back to the first stage converter, wherein in the second feedback loop, the feedback voltage changes as a function of the current of the LED load.
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