| 摘要 |
<p>A device for rapid short-circuit protection in a power semiconductor is described. It has at least one power semiconductor (10, 38) via which a load current (IL) may be applied to at least one electric load (24). The current detection means (14, 18, 46) provide a measure (VIS) of the load current (IL) applied to the electric load (24). A semiconductor protective circuit (30, 32, 34, 36) triggers the power semiconductor (10, 38) to protective operation in the event of an imminent impairment of the power semiconductor (10, 38). In addition to the semiconductor protective circuit (30, 32, 34, 36), at least one additional electronic component (62, 72, 74) is provided to compare the load current (IL) or a measure (VIS) of the load current with a limiting value (60, VCC), monitoring means (34, 76, 78, 86) being provided to trigger the power semiconductor (10) to protective operation with respect to the electric load (24) in the event the load current or a measure thereof exceeds or drops below the limiting value (60, VCC).</p> |
