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

US12088283B2 · kind B2 · 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, 2023
• Grant date: Sep 10, 2024
• Expiry date: Jul 12, 2043

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03K2217/0036
• 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 control a gate voltage to generate an on-current during a plurality of turn-on switching events to turn on the transistor. 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 boost interval, source a second portion of the on-current to the gate terminal to charge a second portion of the gate voltage. A control circuit measures a transistor parameter representative of a reverse recovery current of the transistor for a turn-on switching event during which the transistor is transitioned to an on state and controls the first driver and controls the second driver based on the measured transistor parameter.