Patent ID: 6680630
Filing Date: 2004-01-20
Classification: H02M,H03K

Abstract:
A driver circuit for power device, comprising:a plurality of low side switching elements for constituting an inverter circuit, said plurality of low side switching elements each having one terminal connected to a load, and other terminal connected to a low potential line of said inverter circuit; a plurality of high side switching elements for constituting said inverter circuit, said plurality of high side switching elements each having one terminal connected to said load, and other terminal connected to a high potential line of said inverter circuit; a plurality of high side switching driver circuits for respectively driving said plurality of high side switching elements, said plurality of high side switching driver circuits each including a high voltage IC; and a plurality of low side switching driver circuits for respectively driving said plurality of low side switching elements, said plurality of low side switching driver circuits each comprising a first low potential power source line, a second low potential power source line, a first high potential power source line, and a second high potential power source line each connected to said high voltage IC, wherein said plurality of low side switching driver circuits each comprise: a first power source to which said plurality of low side switching driver circuits are commonly connected; a first capacitor connected to said first power source through said first low potential power source line and said first high potential power source line; a second capacitor connected to said first power source through said second low potential power source line and said second high potential power source line; a first current limiting element provided between a node between said first low potential power source line and said first capacitor, and said second low potential power source line; and second current limiting elements respectively provided on said second low potential power source line and said second high potential power source line for connecting said first power source and said second capacitor.