Gate Driver Signal Sharing for Reduced Wiring and EMI

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Solution Overview

Problem

Existing power switch driver circuits face challenges in efficiently integrating switching and communication functions without additional wiring, leading to increased complexity and potential interference.

Innovation Solution

The integration of a power switch driver circuit that receives switching and communication signals on the same signal path, utilizing a detection circuit to hold switching signals and a configuration decoding circuit to decode communication signals within defined windows, allowing for separate processing of these functions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If switching and communication functions are integrated on the same signal path, then wiring complexity is reduced, but signal interference and processing complexity increase

Engineering Contradiction:

Improvewiring complexityVSAvoidelectromagnetic interference

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent segments the signal path into distinct time windows: a first time window for switching signals and a second time window for communication signals. This temporal segmentation allows both functions to share the same physical wiring without interference, reducing wiring complexity while maintaining signal integrity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements periodic time-division multiplexing where switching and communication functions are assigned to alternating time windows. The controller periodically switches between receiving switching commands and communication data on the same signal path, enabling function integration without continuous interference.

Inventive Principle:

Principle #19Periodic action

2Device complexity

If switching and communication functions are integrated on the same signal path, then additional wiring is eliminated, but signal detection and processing difficulty increases

Engineering Contradiction:

Improvewiring complexityVSAvoidsignal detection difficulty

Core Design Contradiction:

Device complexityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent applies preliminary action by pre-defining specific time windows for switching and communication functions before signals are transmitted. The controller and driver circuit are configured in advance to recognize and process signals based on their temporal position, simplifying real-time detection and processing.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system employs feedback mechanisms where the driver circuit responds to signals received during specific time windows by performing predetermined actions. The controller adjusts timing and signal parameters based on the driver's response, enabling reliable signal detection and processing despite the integrated signal path.

Inventive Principle:

Principle #23Feedback

3Device complexity

If communication signals are received during the switching signal duration, then wiring is simplified, but switching signal accuracy may be compromised

Engineering Contradiction:

Improvewiring complexityVSAvoidswitching signal accuracy

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent divides the signal reception period into segmented time windows: a first time window dedicated to switching signals and a second time window for communication signals. This segmentation ensures that switching signal accuracy is maintained by preventing communication signals from overlapping with switching signal reception.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system uses periodic time-division multiplexing where switching and communication functions are assigned to alternating time windows. This periodic structure ensures that switching signals are received with high accuracy during their designated windows while communication signals are processed during separate windows, maintaining both functions' precision.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS12542480B2Configuration techniques for gate drivers with reduced wiring

Publication Date: 2026.02.03 INFINEON TECHNOLOGIES AG

AI summary

In general, the disclosure describes circuits and techniques to operate power switch driver circuits as well as techniques to dynamically change configuration parameters. The power switch driver circuit of this disclosure may be configured to received communication signals along the same signal paths as for pulse modulated switching control signals. In other words, the power switch driver circuit may receive a main function signaling, switching the power switches on and off, overlaid with a secondary function signaling, communication, which may include configuration parameters. In this manner the power switch driver circuit may receive both switching (commutation) function and communication function along the same signal path.