| 摘要 |
PROBLEM TO BE SOLVED: To provide a solenoid driving device which suppresses the generation of variations in boosted voltage values due to heat.SOLUTION: A voltage restriction circuit 32 of a solenoid driving device has a function for restricting a value of boosted voltage generated by a boosting power supply circuit. The voltage restriction circuit 32 is equipped with boosted voltage comparing means 52, and boosted voltage discharging means 54. If the boosted voltage comparing means 52 compares a partial pressure value of the boosted voltage voltage-divided by a resistor 56 and a resistor 58, with a reference voltage value, and determined that the partial pressure value is higher than the reference voltage value, the boosted voltage discharging means 54 lowers the partial pressure value to the reference voltage value or less.SELECTED DRAWING: Figure 2 |
