| 摘要 |
PROBLEM TO BE SOLVED: To provide a fault detection device for a DC/DC converter capable of detecting a fault of a semiconductor without erroneous detection and in a short time.SOLUTION: The fault detection device for a DC/DC converter 1 including a booster circuit 2 to which an external input voltage is applied, and a semiconductor 3 connected to the booster circuit 2 includes detection means 4 for detecting the fault of the semiconductor 3. The detection means 4 detects a differential between a voltage at an upstream position of the semiconductor 3 and a voltage at a downstream position of the semiconductor 3 and, if the differential is not detected at all within a unit time, judges that the semiconductor 3 is being broken.SELECTED DRAWING: Figure 1 |
