Patent ID: 7928758
Filing Date: 2011-04-19
Classification: H02M,H03K

Abstract:
1. A transistor gate driving circuit with power saving of power converter, comprising: a first high-side transistor, having a drain terminal to receive a supply voltage, and a source terminal to generate a drive signal for driving a gate terminal of a transistor of the power converter; a second high-side transistor, having a source terminal to receive the supply voltage, and a drain terminal to generate the drive signal; a low-side transistor, having a drain terminal to generate the drive signal, and a source terminal coupled to a ground; a control circuit, coupled to control gate terminals of the first high-side transistor, the second high-side transistor and the low-side transistor in response to a switching signal; and a detection circuit, generating a disable signal to limit the drive signal in response to a load condition of the power converter, wherein the disable signal is coupled to disable the second high-side transistor to reduce a switching loss at a light-load once the load condition of the power converter is lower than a threshold.