发明名称 Gate driving circuit
摘要 A highly-reliable gate driving circuit achieved by suppressing the amount of hot-carriers generated in a MOSFET. In the gate driving circuit having NOEMI circuits, same-type NOEMI circuits are connected in series with a p-channel MOSFET constituting a gate charging circuit and an n-channel MOSFET constituting a gate discharging circuit, respectively, so as to suppress the amount of hot-carriers generated in the p-channel MOSFET and the n-channel MOSFET.
申请公布号 US8742802(B2) 申请公布日期 2014.06.03
申请号 US201113298279 申请日期 2011.11.16
申请人 Fuji Electric Co., Ltd. 发明人 Jonishi Akihiro;Sumida Hitoshi
分类号 H03K3/00;H03K17/06 主分类号 H03K3/00
代理机构 代理人
主权项 1. A gate driving circuit for driving an insulated gate switching element, comprising: a gate charging circuit configured to charge gate capacitance of the insulated gate switching element, the gate charging circuit including a first p-channel metal oxide semiconductor field effect transistor (MOSFET), anda second p-channel MOSFET having a source thereof connected in series with a drain of the first p-channel MOSFET and constituting a first same-type normally-on enhancement MOSFET insertion (NOEMI) circuit; and a gate discharging circuit, connected in series with the gate charging circuit, configured to discharge a charge of the gate capacitance, the gate discharging circuit including a first n-channel MOSFET, anda second n-channel MOSFET having a source thereof connected in series with a drain of the first re-channel MOSFET and constituting a second same-type NOEMI circuit, wherein a drain of the second n-channel MOSFET is connected in series with a drain of the second p-channel MOSFET, a source of the first p-channel MOSFET is connected to a first terminal, a source of the first n-channel MOSFET is connected to a second terminal, a gate of the second p-channel MOSFET is connected to the second terminal, a gate of the second n-channel MOSFET is connected to the first terminal, a gate of the first p-channel MOSFET and a gate of the first n-channel MOSFET are connected to each other, a connection point of the gate of the first p-channel MOSFET and the gate of the first n-channel MOSFET is connected to an input terminal, and a connection point of the drain of the second p-channel MOSFET and the drain of the second n-channel MOSFET is connected to an output terminal.
地址 Kawasaki-Shi JP