초록 ▼

A gate driver for a power switch, comprising a gate drive circuit coupled to the gate of the power switch for at least one of turning on and turning off the power switch; a gate voltage control circuit in the gate drive circuit for controlling a voltage applied to the gate of the power switch during

A gate driver for a power switch, comprising a gate drive circuit coupled to the gate of the power switch for at least one of turning on and turning off the power switch; a gate voltage control circuit in the gate drive circuit for controlling a voltage applied to the gate of the power switch during at least one of turning on and turning off the power switch; and a signal supplied to the gate voltage control circuit indicative of a voltage rate of change per unit time to be applied in at least one of turning on and turning off the power switch.

대표청구항 ▼

What is claimed is: 1. A gate driver for a power switch, comprising: a gate drive circuit coupled to the gate of the power switch for at least one of turning on and turning off the power switch; a gate voltage control circuit in the gate drive circuit for controlling a voltage applied to the gate o

What is claimed is: 1. A gate driver for a power switch, comprising: a gate drive circuit coupled to the gate of the power switch for at least one of turning on and turning off the power switch; a gate voltage control circuit in the gate drive circuit for controlling a voltage applied to the gate of the power switch during at least one of turning on and turning off the power switch; a signal supplied to the gate voltage control circuit indicative of a voltage rate of change per unit time to be applied in at least one of turning on and turning off the power switch; a level shifting circuit for shifting a reference for the gate driver to a high voltage reference; and a variable pulse width generator coupled to the level shifting circuit and operable to provide the level shifting circuit with pulses indicative of a beginning and end of a gate command for the power switch; and the pulses having a width that varies dependent upon a desired dv/dt control parameter. 2. A gate driver for a power switch, comprising: a gate drive circuit coupled to the gate of the power switch for at least one of turning on and turning off the power switch; a gate voltage control circuit in the gate drive circuit for controlling a voltage applied to the gate of the power switch during at least one of turning on and turning off the power switch; a signal supplied to the gate voltage control circuit indicative of a voltage rate of change per unit time to be applied in at least one of turning on and turning off the power switch; a level shifting circuit for shifting a reference for the gate driver to a high voltage reference; and a pulse consolidation circuit for producing a switch command based on a beginning and end pulse, the switch command being applied to control the gate of the power switch. 3. The gate driver according to claim 2, wherein the pulse consolidation circuit is an RS flip flop, with the beginning and end pulses coupled to inputs of the flip flop. 4. A gate driver for a power switch, comprising: a gate drive circuit coupled to the gate of the power switch for at least one of turning on and turning off the power switch; a gate voltage control circuit in the gate drive circuit for controlling a voltage applied to the gate of the power switch during at least one of turning on and turning off the power switch; a signal supplied to the gate voltage control circuit indicative of a voltage rate of change per unit time to be applied in at least one of turning on and turning off the power switch; a level shifting circuit for shifting a reference for the gate driver to a high voltage reference; and a pulse to voltage converter coupled to the level shifting circuit and operable to provide an analog voltage level based on a width of an input pulse, the analog voltage level being applied to the gate voltage control circuit.