Patent ID: 11870428
Assignee: INFINEON TECHNOLOGIES AUSTRIA AG
Field: Basic communication processes (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 18:
19. A method of operating a hot-swappable circuit comprising a series transistor and a capacitor coupled to a first load path terminal of the series transistor, the method comprising:
connecting a second load path terminal of the series transistor to a power supply; and
charging the capacitor via the series transistor, charging the capacitor comprising:
measuring a voltage across the series transistor;
measuring a current through the series transistor;
determining a safe operating current for the voltage measured across the series transistor;
adjusting, for each of a first sequence of current pulses, a voltage of a voltage pulse applied to a control node of the series transistor until the current measured through the series transistor is not greater than a first function of the safe operating current;
adjusting, for each of a second sequence of current pulses after the first sequence of current pulses, the voltage of the voltage pulse applied to the control node of the series transistor until the current measured through the series transistor is not greater than a second function of the safe operating current; and
applying a continuous voltage to the control node of the series transistor, after the second sequence of current pulses, until the current measured through the series transistor is not greater than a DC safe operating current for the voltage measured across the series transistor.