Secondary sided driver circuit for controlling e.g. MOSFET utilized as TOP switch of half bridge circuit, has comparison element whose measuring input potential is approximately constant at different temperatures

摘要

The circuit has a comparison element (30) i.e. shunt regulator, whose measuring input (302) is connected with an anode of a diode (42). A cathode of the diode is connected with a load contact unit (402) of a power semiconductor component i.e. power transistor (40). The comparison element exhibits temperature coefficients that are approximately same to that of the power semiconductor component, where potential of the measuring input of the comparison element is approximately constant at different temperatures. A zener diode (22) exhibits same temperature co-efficient as that of the diode.