System for supplying output current to one or more light emitting diodes
A light-emitting diode, high-level technology, applied in the circuit field, can solve the problems of large printed circuit size, inability to directly put it into the lamp socket, LED lamp drive circuit is easily damaged, etc., and achieve the effect of high overvoltage protection function
Active Publication Date: 2018-03-16
ON BRIGHT ELECTRONICS SHANGHAI
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Problems solved by technology
However, when LEDs are used to replace incandescent lamps, because LED lamp driving circuits generally do not have an overvoltage protection function or the accuracy of overvoltage protection is not high, the LED lamp driving circuit is easily damaged or cannot be used efficiently.
In order to achieve high-precision overvoltage protection, it is necessary to add complex peripheral circuits to the LED lamp drive circuit. On the one hand, the cost is high; on the other hand, the size of the printed circuit will be large, and it cannot be directly placed in the lamp socket.
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[0015] Features and exemplary embodiments of various aspects of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention. The present invention is by no means limited to any specific configurations and algorithms presented below, but covers any modification, substitution and improvement of elements, components and algorithms without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques have not been shown in order to avoid unnecessarily obscuring the present invention.
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A system for providing output current to one or more light emitting diodes is disclosed, comprising: a switch control assembly configured to generate a control signal based on information associated with a modulation signal, a demagnetization signal, and a reference signal, and utilize the The above control signal is used to control the cut-off and turn-on of the system power switch, wherein the system power switch is connected to the first diode terminal of the diode and the first inductor terminal of the inductor, the diode further includes a second diode terminal, the inductor The inductor also includes a second inductor terminal, and one or more light emitting diodes are connected in parallel with the output capacitor between the second diode terminal and the second inductor terminal. A method for controlling the output voltage of the system described above is also disclosed. The invention has precise overvoltage protection function.
Description
technical field [0001] The present invention relates to the field of circuits, and more particularly to a system for supplying output current to one or more light emitting diodes. Background technique [0002] At present, light-emitting diode (LED) lighting technology has matured day by day. Due to its high luminous efficiency and long service life, LEDs are widely used in the field of lighting to replace traditional incandescent lamps. However, when LEDs are used to replace incandescent lamps, because LED lamp driving circuits generally do not have an overvoltage protection function or the accuracy of overvoltage protection is not high, the LED lamp driving circuit is easily damaged or cannot be used efficiently. In order to achieve high-precision overvoltage protection, it is necessary to add complex peripheral circuits to the LED lamp drive circuit. On the one hand, the cost is high, and on the other hand, the printed circuit size is large, and it cannot be directly plac...
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IPC IPC(8): H05B37/02
Inventor 周俊方烈义
Owner ON BRIGHT ELECTRONICS SHANGHAI