| 摘要 |
<p>The invention disclosed here relates to a method and arrangement for limiting the starting current in a switching power supply. As the operating voltage is switched on in the power supply an uncharged capacitor (C1) in the power supply represents a short circuit, generating a large starting current which is limited by a limiting element (16) to a desired value. To ensure uninterrupted operation of the switching power supply the limiting element (16) should be bypassed as soon as possible after the switching-on of the operating voltage. Therefore, in parallel with the limiting element (16) there is provided a bypass unit (14) via which the bypass current can be conducted. The limiting element bypass unit (14) is controlled by a control signal which is generated by means of a capacitive voltage divider circuit from the primary voltage.</p> |
