| 摘要 |
A Light emitting diode (LED) dimming system comprises a voltage regulating converter, an input of which is connected to a power supply; a constant current module, an output of which is connected to an LED load constituted by one LED light or multiple serial LED lights; the output of the voltage regulating converter is connected with the input of the constant current module via a switch, and the switch is controlled to be on-off by an adjustable pulse signal. The invention has the advantages of high power factor and low electromagnetic interference, and easy implementation, etc.
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