LED DRIVING POWER SUPPLY, POWER SUPPLY CIRCUIT, AND POWER SUPPLY METHOD

The present invention provides an LED driving power supply, a power supply circuit, and a power supply method. The power supply circuit comprises: a rectifier module, which rectifies an alternating current voltage to obtain an input voltage. A first diode and a second diode are connected in series i...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	LIU, Chaorui, ZHANG, Yun, XIA, Yulong, HE, Qiangzhi
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	The present invention provides an LED driving power supply, a power supply circuit, and a power supply method. The power supply circuit comprises: a rectifier module, which rectifies an alternating current voltage to obtain an input voltage. A first diode and a second diode are connected in series in the same direction, and then connected in parallel to an output end of the rectifier module. A first end of a first inductor is connected to a cathode of the first diode, and a second end is connected to a first end of a main switch. A freewheeling module is connected in parallel to two ends of the first inductor. A lower plate of a first capacitor is connected to an anode of the first diode, and an upper plate is connected to the second end of the first inductor. A first end of the second inductor is connected to a second end of the main switch, and a second end is connected to an inverting output end of the rectifier module via a second capacitor. A cathode of a third diode is connected to the first end of the second inductor, and an anode is connected to the inverting output end of the rectifier module. The present invention has two switches, that is there are two control degrees of freedom, which facilitates the optimization of control parameter design; and the present invention has a fast load dynamic response speed and small output current ripple.