Led control circuit and led illumination system
AssigneeInventronics (Hangzhou), Inc.
InventorsPing FU, Delai JIANG
Life of this patent
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Abstract
An LED control circuit, comprising: an isolated DC-DC circuit having a first current loop and a voltage loop, said circuit being used for outputting a stable direct current voltage; and a buck circuit having a control unit; wherein the control unit is used for controlling the buck circuit to output constant current, so as to supply power to an LED load, and also used for controlling the buck circuit to not operate when the direct current voltage is less than a preset voltage, and controlling the buck circuit to operate when the direct current voltage is greater than or equal to the preset voltage.
Claims9
An LED control circuit, comprising:
- an isolated DC-DC circuit, arranged with a first current loop and a voltage loop and configured to convert an output voltage of a power grid to output a direct current voltage;
- and
- a BUCK circuit, arranged with a control unit, wherein the control unit is configured to control the BUCK circuit to output a constant current to supply power to an LED load, control the BUCK circuit not to operate in a case that the direct current voltage is less than a predetermined voltage, and control the BUCK circuit to start to operate in a case that the direct current voltage is greater than or equal to a predetermined voltage.
Dependencies are inferred from the claim text.