Patent ID: 6175256
Filing Date: 2001-01-16
Classification: H03K

Abstract:
A control circuit for controlling a power semiconductor comprising a gate driver including a control circuit input, auxiliary voltage inputs and an output, wherein the control circuit further comprises:a first semiconductor switch including a control electrode and main electrodes, a first main electrode forming a positive input pole of the control circuit and a second main electrode forming an output of the control circuit;a second semiconductor switch including a control electrode and main electrodes, a first main electrode forming a negative input pole of the control circuit and a second main electrode being connected to the output of the control circuit;a first resistance including a first pole connected to the positive auxiliary voltage input of the gate driver and a second pole connected to the positive input pole of the control circuit, the positive auxiliary voltage input being arranged to control the first semiconductor switch;a second resistance including a first pole connected to the negative auxiliary voltage input of the gate driver and a second pole is connected to the negative input pole of the control circuit, the negative auxiliary voltage input being arranged to control the second semiconductor switch;a first zener diode including an anode connected to the output of the gate driver and a cathode connected to the positive input pole of the control circuit; anda second zener diode including a cathode connected to the output of the gate driver and a anode connected to the negative input pole of the control circuit.