Circuit arrangement with a power transistor and a drive circuit for the power transistor

摘要

Circuit arrangement with a power transistor (t), which has a control terminal (g) and a load path (d - s), with a in series to the load path (d - s) and the load connected to a control circuit (10), which has an output (ak) to the control terminal (g) is connected, and which has the following further features:– a first control unit to the conducting of the activation of the power transistor (t1) with a between a first drive potential (uin) and the output (ak) connected first current source (iq1) and with a third current source (iq3), which at the output (ak) is connected and the one of a voltage (ul) via the load dependent current (i3), provides to the load voltage (ul) by means of a non-linear characteristic curve, a of the first current source (iq1) being supplied with current (i1) and the of the third current source (iq3) current supplied (i3) during a charging process to a charging current (ic1) at the output terminal (ak) according to ic1 = i1, i3 adding,..