Bootstrap voltage supply
The device has an active current limiter and a voltage regulator. The driver control voltage corresponds to the voltage applied to a boot capacitor connected on one side to an essentially constant supply voltage via a boot diode and perhaps a boot resistance in series and on the other side to the converter output of the switch element. The active current limiter and/or the voltage regulator is connected between the boot diode and capacitor. The device has an active current limiter and a voltage regulator. The control voltage of the driver (2b) corresponds to the voltage applied to a boot capacitor (6), which is connected on one side to an essentially constant supply voltage (Vcc) via a boot diode (4) and perhaps a boot resistance in series and on the other side to the converter output (U) of the switch element (1b). The active current limiter (7) and/or the voltage regulator (12) is connected between the boot diode and capacitor.