Actively tracking switching speed control and regulating switching speed of a power transistor during turn-on

US11444613B1 · kind B1 · utility

Assignee

• Infineon Technologies AG · DE

Inventors

• Zheming Li · Bayreuth, DE
• Mark-Matthias Bakran · Erlangen, DE
• Daniel Domes · Schwäbisch Hall, DE
• Robert Maier · Babenhausen, DE
• Franz-Josef Niedernostheide · Hagen am Teutoburger Wald, DE

Key dates

• Filing date: Jul 12, 2021
• Grant date: Sep 13, 2022
• Expiry date: Jul 12, 2041

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03K2217/0027
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

A gate driver system includes a gate driver circuit coupled to a gate terminal of a transistor and configured to generate an on-current during a plurality of turn-on switching events to turn on the transistor, wherein the gate driver circuit includes a first driver configured to source a first portion of the on-current to the gate terminal to charge a first portion of the gate voltage and a second driver configured to, during a first boost interval, source a second portion of the on-current to the gate terminal to charge a second portion of the gate voltage; a measurement circuit configured to measure a transistor parameter indicative of an oscillation of a load current for a turn-on switching event; and a controller configured to receive the measured transistor parameter and regulate a length of the first boost interval based on the measured transistor parameter.