Switching element driving device
AssigneeDenso Corporation
InventorAkifumi ARARAGI
Life of this patent
Estimating the term…
Abstract
A switching element driving device includes a main on switch that is connected to gates of a first and second IGBTs and that, when brought into a conductive state, turns on the first and second IGBTs, diodes each disposed between the main on switch and one of the gates of the first and second IGBTs, the diodes having a forward direction from the main on switch to the gates of the first and second IGBTs, an on sub-switch that is connected to the gate of the second IGBT and that, when brought into the conductive state, turns on the second IGBT, and a control circuit that controls the conductive state and a non-conductive state of the main on switch and the on sub-switch.
Claims15
A switching element driving device for driving a plurality of switching elements connected in parallel, comprising:
- a main switch connected to gates of the plurality of switching elements, the main switch being configured to, when brought into a conductive state, increase potentials of the gates of the plurality of switching elements to turn on the plurality of switching elements;
- a plurality of rectifying elements each disposed between the main switch and one of the gates of the plurality of switching elements, the plurality of rectifying elements having a forward direction from the main switch to the gates of the plurality of switching elements;
- a sub-switch connected in parallel with the main switch, the sub-switch being connected to a gate of a switching element among the plurality of switching elements on a downstream side of the rectifying elements, the number of switching elements connected to the sub-switch being smaller than the number of switching elements connected to the main switch, the sub-switch being configured to, when brought into the conductive state, increase a potential of the gate of the switching element connected to the sub-switch to turn on the switching element connected to the sub-switch;
- and
- a control circuit that controls the conductive state and a non-conductive state of the main switch and the sub-switch.
Dependencies are inferred from the claim text.