Patent ID: 8773177
Filing Date: 2014-07-08
Classification: H03K

Abstract:
1. A drive circuit for driving a switching device, the drive circuit comprising: a first terminal, a second terminal, a controller, and a charge pump including a capacitor, wherein the first terminal is configured to be connected with one of polarities of a DC power source, the second terminal is configured to be connected with another of the polarities of the DC power source, the controller is configured to connect a gate terminal of the switching device with the first terminal in a first stage, and to connect the gate terminal of the switching device with the second terminal in a second stage, the capacitor of the charge pump is configured to be charged in the first stage, and to be connected to the gate terminal of the switching device in the second stage, and the charge pump is configured to be able to adjust a charging voltage charged in the capacitor to different magnitudes according to an order signal.