Opening method of output tube of LED drive integrated circuit
A technology of LED driver and integrated circuit, applied in the direction of electric lamp circuit layout, electric light source, lighting device, etc., to achieve the effect of avoiding EMI problems
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[0012] Since the EMI problem of the existing solution is mainly caused by the fixed frequency control of the output tube, this embodiment proposes the following solution to change the opening time of the output tube, thereby avoiding EMI and other problems.
[0013] The drive power provided in this embodiment includes: an output tube controller, an output tube, and a pressure drop device, the voltage drop device is connected in series with the output tube, and the current flowing out of the output tube flows into the voltage drop device, and it is characterized in that the output tube The controller specifically includes: an output tube current acquisition module for collecting the current flowing through the output tube; an output tube opening module for starting the output tube when the current collected by the acquisition module is zero; an output tube closing module , used to close the output tube when the pressure drop on the pressure drop device reaches a predetermined va...
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