| 摘要 |
In a solenoid driving device of the type in which energy stored in a capacitor is used for re-driving of the solenoid, the generation of heat in the current back-flow preventing circuit that prevents the back-flow of current to the power supply terminal is suppressed, and the generation of heat in the rectifying element through which the current that flows to the capacitor passes is also suppressed. Electric power that is accumulated in the solenoid when the driving of the solenoid is stopped is temporarily stored in a capacitor, and a high voltage that is generated by the charging utilizing the peak voltage of the capacitor is utilized as the power supply for a discharge control circuit that is used to control the discharge of this capacitor. A current back-flow preventing circuit is constructed from a switching element such as an FET or the like, so that the generation of heat in this circuit is suppressed. Furthermore, a rectifying element through which the current that flows to the capacitor passes is constructed from a switching element such as an FET or the like, so that the generation of heat in this element is suppressed. <IMAGE>
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