Tung & Associates
LED driver with direct AC-DC conversion and control, and method and integrated circuit therefor
The present invention discloses an LED driver with direct AC-DC conversion and control function, and a method and integrated circuit therefor. The LED driver comprises: a primary side circuit receiving rectified AC power, the primary side circuit including at least one power switch; a transformer coupled to the primary side circuit and controlled by the at least one power switch to convert a primary voltage to a secondary voltage which is supplied to an LED circuit; and a secondary side circuit coupled to the transformer, the secondary side circuit directly controlling current flowing through the LED circuit and sending a feedback signal to the primary side circuit to control the at least one power switch thereby.
Richtek Technology Corporation
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Y02B H05B H05B H05B H05B H02M
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Roland Chia-Wei Jing-Meng
Van Roy Liao Liu