In-vehicle interrupting current supply device

An in-vehicle interrupting current supply device that is applied to an in-vehicle interrupting device including an interrupter and a switch, the interrupter being provided in an electric power path and including a current input portion that is insulated from the electric power path, and the in-vehicle interrupting device operating to permit current conduction to the current input portion in response to the switch performing an ON operation and thereby cause the interrupter to perform an interrupting operation of interrupting the electric power path,

• the in-vehicle interrupting current supply device comprising:
• a transformer that includes a first winding portion and a second winding portion;
• a driving unit that performs switching between a permission state in which current conduction to the first winding portion is permitted and a cancellation state in which the permission state is cancelled;
• and
• a capacitor that is electrically connected to an intermediate conductive path between the second winding portion and the interrupter to receive electric power from the second winding portion,
• wherein a charge current is supplied from the second winding portion side to the capacitor in response to the driving unit repeating alternate switching between the permission state and the cancellation state, and
• in response to the switch performing the ON operation, the capacitor is discharged, and a driving current flows into the current input portion.