Back to results
US 2004/0070995 A1Published application
DC-DC converter
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorTakashi Sugimoto
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorTakashi Sugimoto
Estimating the term…
Provided is a DC-DC converter which is capable of obtaining a stable output irrespective of the fluctuation of the power source voltage and ensuring the reliability of a device. The DC-DC converter configured such that a current of a primary coil of a boosting transformer supplied from a power source unit is intermittently caused to flow through the converter by a power MOS-FET and an ignition capacitor is charged with electricity through a rectifier diode using the voltage of a secondary coil of the boosting transformer boosted by the flyback voltage of a coil, includes a current detecting circuit for detecting a drain current of the power MOS-FET, and a control circuit for, when the drain current detected by the current detecting circuit exceeds a predetermined threshold, turning off the power MOS-FET for a fixed period of time, and then turning on the power MOS-FET again.
A DC-DC converter configured such that a current of a primary coil of a boosting transformer which is supplied from a power source unit is intermittently caused to flow through said converter by a power MOS-FET, and an ignition capacitor is charged with electricity through a rectifier diode using a voltage of a secondary coil of said boosting transformer boosted by a flyback voltage of a coil, said DC-DC converter comprising:
Dependencies are inferred from the claim text.