| 摘要 |
PROBLEM TO BE SOLVED: To obtain an overcurrent protection circuit capable of surely performing operation without increasing power source capacity for melting a fuse, even when reproducibility of melting is low due to influence of a peripheral temperature or the like of a fuse and short circuit is caused by low-resistance short circuit.SOLUTION: An overcurrent protection circuit: uses a first fuse and a second fuse in which a melting threshold is lower than a maximum current value in normal operation of a load circuit; is configured so that a first current line including the first fuse and a second current line including a switch connected to the second fuse in series are connected to each other in parallel; includes a current value detection part for detecting a current value flowing in the load circuit; and is configured so as to open/close the switch included in the second current line on the basis of the current value of the load circuit detected by the current detection part. |
