Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Delai Jiang
Ping Fu
Jian Han
Date of Patent
September 19, 2023
Patent Application Number
17917935
Date Filed
July 7, 2021
Patent Citations
Patent Primary Examiner
Patent abstract
An LED drive circuit, comprising: a Flyback circuit that has a current-limiting mode and a constant-voltage mode, a non-isolated DC-DC circuit, and a control circuit. The control circuit is used to detect the output voltage of the Flyback circuit, and, when the output voltage of the Flyback circuit is greater than or equal to a first preset voltage value, control the Flyback circuit to operate in the constant-voltage mode; the control circuit is further used to detect the switch transistor current or output current of the Flyback circuit, and, when the output current of the Flyback circuit is greater than a first preset current value, control the Flyback circuit to operate in the current-limiting mode.
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