| 摘要 |
PURPOSE:To form an economical and compact power supply apparatus with two kinds of output, by a method wherein the primary winding for a transformer is switching-controlled, and wherein two pieces of the secondary winding are provided and DC voltage is obtained from one side and high frequency voltage is obtained from the other side. CONSTITUTION:The primary winding L2 and two pieces of the separate secondary winding L3, L4 are provided for a transformer T2. And a switching transistor Q1 is connected to the primary winding L2 in series, and the transformer T2 is supplied with switched DC voltage by ON/OFF-controlling with a driver DV. And the stabilized DC voltage V0 for output is obtained from the secondary winding L3 on one side, and from the secondary winding L4 on the other side, the high frequency voltage for output for supplying fluorescent lamp load FL or the like is obtained. The DC output V0 of the secondary winding L3 may be directed to the driver DV on the primary winding L2 side to be controlled for feedback. |
