| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of a system in the prior art that it is difficult to strike a balance between the suppression of the power loss of a voltage control type power switching element Sw and the suppression of surge. SOLUTION: The gate of a power switching element Sw is connected to the positive electrode of a power supply 30 via a resistor 34 for charge, a bipolar transistor 32 for charge, and a MOS transistor 40 for charge. To switch on the power switching element Sw, the gate of the power switching element Sw is charged with positive charge by turning on a bipolar transistor 32 for charge to begin with. Then, after the power switching element Sw is switched on, a MOS transistor 40 for charge is turned on. COPYRIGHT: (C)2010,JPO&INPIT
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