| 摘要 |
<p>A low-voltage DC power supply, e.g. 5 V output, is fed from a higher-voltage input DC source, e.g. 300 V. A plurality of switched transformers each comprise a primary winding (L1) for switchably connecting to the input, a secondary winding (L2) for switchably connecting to the output, electronic switches (M1-M8) for alternatingly switching the windings (L1, L2) in opposite polarities, and common control means (10) for performing the switching such that in the plurality of transformers, no two thereof are simultaneously switching. For removing the influence of rapid output current surges, a filter (L9, L10, C10-C12) is arranged on the input side.</p> |
