ELECTROMAGNETIC COUPLING MULTI-OUTPUT CONTROL CIRCUIT

摘要

Disclosed is an electromagnetic coupling multi-output control circuit having a detection unit, a switching unit and a coupling unit, and the coupling unit is coupled to a side of a transformer of a power driving device to sense and produce a second driving voltage, such that the transformer has a multi-output function. The switching unit is provided for receiving and outputting the second driving voltage to a second driving load, and the detection unit is provided for detecting the second driving voltage to produce a detection value, so that the switching unit analyzes the detection value and switches outputting a frequency of the second driving voltage to stabilize the voltage value of the second driving voltage, so as to flexibly increase the number of output voltages of the power driving device while lowering the cost and expand the scope of applicability.

主权项

1. An electromagnetic coupling multi-output control circuit, applied to a power driving device of an illumination device such as a liquid crystal display (LCD), a television or a light emitting diode (LED) lamp to allow the power driving device to have a multi output voltage function, and the power driving device using a transformer to sense an input voltage to produce a first driving voltage and then output the first driving voltage to a first driving load of the illumination device, characterized in that the electromagnetic coupling multi-output control circuit comprises a detection unit, a switching unit and a coupling unit, and the coupling unit is electromagnetically coupled to a side of the transformer to produce a second driving voltage, and the switching unit is electrically coupled to the coupling unit, a second driving load of the illumination device and the detection unit; and the switching unit receives and outputs the second driving voltage to the second driving load, and the detection unit detects the second driving voltage to produce a detection value, so that the switching unit can analyze the detection value to switch and output a frequency of the second driving voltage to achieve the effect of stabilizing a voltage value of the second driving voltage.