Control Circuit for Controlling an Electronic Circuit and Method for This
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Abstract
A control circuit for controlling an electronic circuit, which has a current path through a semiconductor switch and a line; when the semiconductor switch is switched, the inductance of the line and/or of a component in the current path producing an excess voltage between a first and a second current-carrying terminal of the semiconductor switch; the control circuit having a controllable current source for charging or discharging a charge-controlled gate of the semiconductor switch with the aid of a control current, as well as a control unit; the control unit controlling the current source in such a manner, that in the case of a switching operation, the terminal voltage across the current-carrying terminals of the semiconductor switch does not exceed a predefined setpoint terminal voltage.
23 Citations
32 Claims
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1-16. -16. (canceled)
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17. A control circuit for controlling an electronic circuit, comprising:
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a semiconductor switch;
a current path through the semiconductor switch and a line, wherein when the semiconductor switch is switched, an inductance of at least one of the line and a component in the current path produces an excess voltage between a first current-carrying terminal and a second current-carrying terminal of the semiconductor switch;
a controllable current source for one of charging and discharging a charge-controlled gate of the semiconductor switch with the aid of a control current; and
a control unit controlling the current source in such a manner, that in the case of a switching operation, a terminal voltage across the first current-carrying terminal and the second current-carrying terminal does not exceed a predefined setpoint terminal voltage. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A method for controlling an electronic circuit, which has a current path through a semiconductor switch and a line, comprising:
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switching the semiconductor switch, an inductance of the line producing an excess voltage between a first and a second current-carrying terminal of the semiconductor switch; and
one of charging and discharging a gate of the semiconductor switch with the aid of a control current, the control current being controlled in such a manner that, in the case of a switching operation, the terminal voltage of the semiconductor switch does not exceed a predefined setpoint terminal voltage.
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Specification