Patent ID: 11901888
Assignee: INFINEON TECHNOLOGIES AUSTRIA AG
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A device, comprising:
a gate charge profiler circuit, comprising:
a current input terminal configured to receive an input signal that controls a gate drive current, wherein the gate drive current drives a gate of a power transistor to control conduction between a drain and a source of the power transistor;
a comparator input terminal configured to receive an input voltage, wherein the input voltage is:
a drain-source voltage across the drain and the source, or
a gate-source voltage across the gate and the source;

a threshold voltage terminal configured to receive a threshold voltage;
a voltage comparator unit, having a first comparator input coupled to the comparator input terminal and a second comparator input coupled to the threshold voltage terminal, and configured to generate a comparison signal based on a comparison of the input voltage and the threshold voltage; and
a timer unit, having a first timer input coupled to the current input terminal and a second timer input coupled to a comparator output of the voltage comparator unit, and configured to determine a time value based on input of a transition of the input signal and input of the comparison signal, wherein a gate charge of the power transistor corresponds to the gate drive current and the time value.