Switching element drive circuit, power module, and automobile
AssigneeMitsubishi Electric Corporation
InventorKazuaki HIYAMA
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Abstract
A switching element drive circuit of the present invention outputs a voltage to the switching element by use of a voltage output unit configured as an amplifier circuit having a voltage amplification factor of 1 to drive the switching element. When the switching element is turned on, a turn-on voltage having a value higher than a threshold voltage of the switching element and lower than a value of a voltage of a power supply of the switching element drive circuit is provided to the voltage output unit. After elapse of a turn-on voltage maintenance period, a voltage provided to the voltage output unit is switched by a voltage switching unit to the voltage of the power supply of the switching element drive circuit.
Claims9
A switching element drive circuit that drives a switching element of a voltage control type, the switching element being switched from an off state to an on state by application of a voltage that is equal to or higher than a threshold voltage to a control electrode, the switching element drive circuit comprising:
- a voltage output unit outputting a voltage to said switching element;
- and
- a voltage switching unit switching a voltage provided to said voltage output unit, wherein
- said voltage output unit is configured as an amplifier circuit having a voltage amplification factor of 1, and
- in performing a turn-on operation of switching said switching element from the off state to the on state, said voltage switching unit provides said voltage output unit with a turn-on voltage having a value that is higher than said threshold voltage of said switching element and is lower than a value of a voltage of a power supply of said switching element drive circuit, and, when a predetermined turn-on voltage maintenance period has elapsed since the provision of the turn-on voltage, switches the voltage provided to said voltage output unit to the voltage of the power supply of said switching element drive circuit.
Dependencies are inferred from the claim text.