INTEGRATED CONVERTER WITH SINGLE-ENDED CONTROL, POWER FACTOR CORRECTION, AND LOW OUTPUT RIPPLE

摘要

An integrated converter with single-ended control and power factor correction includes an input unit, a boost inductor, a voltage regulator, an energy-storing capacitor, a buck-boost converter, a single-ended switch and a control unit. The voltage regulator and the buck-boost converter share the single-ended switch and the control unit in order to correct power factor, reduce output ripple, simplify the complexity of circuit and decrease the number of components. The voltage regulator is utilized in reducing the frequency of switching and the conductive losses, thus improving overall performance. With the magnetic loop, the transformers of the boost inductor and the voltage regulator can be merged, and thus the efficiency of the whole spatial usage is increased and the noise interference is reduced.

主权项

1. An integrated converter, comprising:
an input unit for receiving an electric-power signal transmitted by a power source; a boost inductor for being electrically coupled to the input unit; a buck-boost converter; a voltage regulator comprising:
a first diode;a second diode; anda first transformer comprising:
a primary winding for being electrically coupled to the buck-boost converter; anda secondary winding for being electrically coupled to the first diode and the second diode, wherein the voltage regulator is electrically coupled to the boost inductor through the first diode and the second diode, and is electrically coupled to the buck-boost converter through the first transformer; an energy-storing capacitor for being electrically coupled to the boost inductor and the voltage regulator; a single-ended switch for being electrically coupled to the buck-boost converter; and a control unit for being electrically coupled to the single-ended switch so as to optionally alter the electromotive force of the first transformer of the voltage regulator and further switch on the first diode or the second diode alternatively.