| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply device for securing safety by positively stopping the circuit operation when a specific product life is reached. SOLUTION: A power supply device has a voltage converting means 1 for converting an output voltage by rectifying an input voltage, an output voltage detecting means 2 for detecting the output voltage, a comparison means 3 for comparing the output voltage with a reference voltage, a constant voltage control means 4 for controlling voltage based on the comparison result of the comparison means, a conduction time measuring means 5 for outputting a circuit operation stop signal when a specific time is exceeded by measuring conduction time in accumulation, and a circuit operation stopping means 6 for stopping circuit operation when a circuit operation stop signal is inputted. |
