公开(公告)号：US20050017768A1

公开(公告)日：2005-01-27

申请号：US10625032

申请日：2003-07-22

Applicant: Xavier de Frutos ,  Bruno Nadd ,  Vincent Thiery ,  Chik Lee

Inventor： Xavier de Frutos ,  Bruno Nadd ,  Vincent Thiery ,  Chik Lee

IPC: H01L20060101 ,  H03B1/00 ,  H03K3/00 ,  H03K17/06 ,  H03K19/00

CPC classification number: H03K17/063

Abstract: A power switching circuit comprising a power semiconductor switching device, a charge pump circuit having a control input to control whether it is on or off and a charge pump output, the charge pump output being coupled to a control terminal of the power semiconductor switching device, a bootstrap power supply for supplying power to driver circuitry for the power semiconductor switching device, the bootstrap power supply comprising a bootstrap capacitor coupled to a charging current source, the bootstrap power supply providing power to the driver circuitry when the power semiconductor switching device is being switched by the driver circuitry in a pulsed mode, and the charge pump supplying a control voltage to turn on the power semiconductor switching device and maintain it on when the power switching semiconductor device is to be maintained on continuously.

Abstract translation: 一种功率开关电路，包括功率半导体开关器件，具有用于控制其是否导通的控制输入的电荷泵电路和电荷泵输出，所述电荷泵输出耦合到所述功率半导体开关器件的控制端子， 用于向功率半导体开关装置的驱动器电路供电的自举电源，所述自举电源包括耦合到充电电流源的自举电容器，所述自举电源在所述功率半导体开关装置正在被驱动时向所述驱动器电路提供电力 通过驱动电路以脉冲模式切换，并且电荷泵提供控制电压以接通功率半导体开关器件，并且当功率开关半导体器件将被连续地保持时保持接通。