POWER SUPPLY DEVICE AND LED LIGHTING APPARATUS PROVIDED WITH THE SAME

To provide a power supply device in which energy loss can be suppressed even when an input voltage to a step-down chopper circuit pulsates.SOLUTION: A power supply device (100) includes a rectifier circuit (110) that rectifies AC current, a step-down chopper circuit (120) that steps down an input vo...

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Bibliographische Detailangaben
1. Verfasser:	TADA RYOHEI
Format:	Patent
Sprache:	eng ; jpn
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:	To provide a power supply device in which energy loss can be suppressed even when an input voltage to a step-down chopper circuit pulsates.SOLUTION: A power supply device (100) includes a rectifier circuit (110) that rectifies AC current, a step-down chopper circuit (120) that steps down an input voltage from the rectifier circuit, and a control unit that halts a switching operation of the step-down chopper circuit in a time period during which the input voltage is lower than an output voltage from the step-down chopper circuit. In the time period during which the input voltage is lower than an output voltage from the step-down chopper circuit, the switching operation is halted.SELECTED DRAWING: Figure 1 【課題】降圧チョッパ回路への入力電圧が脈動しても、エネルギー損失を抑制できる電源装置を実現する。【解決手段】電源装置（１００）は、交流を整流する整流回路（１１０）と、前記整流回路からの入力電圧を降圧する降圧チョッパ回路（１２０）と、入力電圧が降圧チョッパ回路の出力電圧より小さい期間に、降圧チョッパ回路のスイッチング動作を停止させる制御部とを備え、入力電圧が降圧チョッパ回路の出力電圧より小さい期間に、スイッチング動作を停止させる。【選択図】図１