Patent ID: 9088159
Filing Date: 2015-07-21
Classification: H02H,H03K

Abstract:
1. A limiting circuit for at least one semiconductor transistor, the circuit comprising: a limiting path coupled between a first power terminal and a second power terminal of the semiconductor transistor and including a limiting transistor, wherein a node of the limiting path between the limiting transistor and the second power terminal of the semiconductor transistor is coupled to a control terminal of the semiconductor transistor; a voltage source, the voltage source comprising a boost converter which is designed to boost a supply voltage at an input terminal of the boost converter to the control voltage for the limiting transistor; wherein the voltage source is coupled to a control terminal of the limiting transistor, and wherein the voltage source is designed to supply a control voltage to the control terminal of the limiting transistor, the control voltage corresponding to a critical voltage for the voltage between the first power terminal and the second power terminal of the semiconductor transistor; and wherein the limiting transistor is switched to the conductive state when the critical voltage is exceeded at a power terminal of the limiting transistor.