| 摘要 |
<p>A DC power supply (1) is connected to one end of the primary winding (2p) of a transformer (2), and the other end of the primary winding (2p) is connected to a switching element (3) controlled by a forward control circuit (4). A rectifier element (5), a chalk coil (7), a switching element (19) and a smoothing circuit (8) are connected in series between the secondary winding of the transformer (2) and an output terminal (9). A rectifier element (6) connected to the rectifier element (5) is connected in parallel with the secondary winding. A switching element (21) and a smoothing circuit (22) are connected in series between the output end of the rectifier element (5) and an output terminal (24). The forward control circuit (4) controls the switching element (3) according to the output voltage from the smoothing circuit (8). The separate control circuit (23) controls the switching element (21) according to the output voltage from the smoothing circuit (22).</p> |
