| 主权项 |
1. A switching element driving circuit comprising:
a charge pump circuit that generates a boosted voltage; and at least one drive voltage generating circuit that
generates a drive voltage, for driving at least one voltage driven switching element having an input capacitance at a control terminal, from the boosted voltage generated in the charge pump circuitapplies a current to the control terminal of the voltage-driven switching element through a resistor at least in an initial stage and an end stage of an output period during which a signal instructing the voltage-driven switching element to be turned on is outputted, andalleviates a rising and a falling of the drive voltage using the input capacitance, wherein the charge pump circuit includes a plurality of capacitors and a control circuit, the control circuit switches a voltage, which is applied to one electrode of each of the plurality of capacitors, between a high-potential-voltage and a low-potential-voltage at a predetermined switching frequency to alternately perform a charging and a discharging of each of the plurality of capacitors, the control circuit integrates charges of the plurality of capacitors in an order from a first capacitor to a last capacitor, the first capacitor being one capacitor of the plurality of capacitors, the last capacitor being another capacitor of the plurality of capacitors, and each voltage outputted from the plurality of capacitors being sequentially boosted in the order from the first capacitor to the last capacitor, and the switching frequency of the charge pump circuit is set from 2 MHz to 30 MHz. |
