| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a power supply device that can insulate an input side and an output side from each other and reduce ripples of an input current, and a luminaire using the same. <P>SOLUTION: The power supply device includes: a rectification circuit 2 for rectifying an AC voltage V1; a series circuit comprising a primary winding T11 of a transformer T1 and a switching element Q1 and a series circuit comprising a primary winding T21 of a transformer T2 and a switching element Q2, both connected between output ends of the rectification circuit 2; a series circuit comprising a diode D1 and a capacitor C1 connected between both ends of the secondary winding T12 of the transformer T1 where one end of a secondary winding T12 of the transformer T1 and one end of a secondary winding T22 of the transformer T2 are connected; a series circuit comprising a diode D2 and the capacitor C1 connected between both ends of the secondary winding T22 of the transformer T2; and a control circuit 3 for alternately turning on/off the switching element Q1 and the switching element Q2. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
