USB Type-C Controller Transconductance Tuning

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Solution Overview

Problem

Existing USB Type-C controllers face challenges in efficiently managing power delivery across a wide voltage and current range due to complex design requirements and the need for manual tuning of parameters, which leads to inefficiencies and increased production time.

Innovation Solution

The implementation of a buck-boost converter with programmable control logic and firmware-updatable transconductance amplifiers allows for optimized performance and efficiency in USB Type-C controllers, enabling dynamic adjustments based on load and line conditions without the need for additional components or manual tuning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual tuning of parameters is performed to optimize power delivery, then performance can be optimized, but production time increases and complexity increases

Engineering Contradiction:

Improvepower delivery performanceVSAvoidproduction time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The control logic automatically detects operating conditions and adjusts parameters without manual intervention. The system performs self-optimization by monitoring voltage and current levels, then dynamically configuring the buck-boost converter parameters to maintain optimal performance across different USB-PD protocols and power delivery scenarios.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The invention dynamically changes control parameters based on detected operating conditions. The control logic modifies duty cycle, switching frequency, and other converter parameters in real-time to optimize power delivery efficiency without requiring manual tuning for each specific application scenario.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If manual tuning of parameters is performed to optimize power delivery, then performance can be optimized, but device complexity increases

Engineering Contradiction:

Improvepower delivery performanceVSAvoiddesign complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The control logic is designed to handle multiple USB-PD protocols and power delivery scenarios with a single unified implementation. The same control structure adapts to different voltage ranges, current levels, and protocol requirements, eliminating the need for separate manual tuning procedures for each application.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Device complexity

If fixed control logic is used, then device complexity is reduced, but adaptability to different voltage and current ranges is limited

Engineering Contradiction:

Improvecontrol logic simplicityVSAvoidvoltage and current range flexibility

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The control logic transitions from a fixed configuration to a dynamic system that automatically adapts to different operating conditions. The control logic monitors voltage and current levels and dynamically adjusts converter parameters to maintain optimal performance across the full USB-PD voltage range (5V to 20V) and various current requirements.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

Inventive Principle:

Principle #35Parameter changes

4Adaptability or versatility

If additional components are added to expand voltage and current range, then adaptability is improved, but device complexity and cost increase

Engineering Contradiction:

Improvevoltage and current rangeVSAvoidcomponent count

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11671013B2Control logic performance optimizations for universal serial bus power delivery controller

Publication Date: 2023.06.06 INFINEON TECHNOLOGIES AMERICAS CORP

AI summary

An IC controller for USB Type-C device includes an error amplifier (EA), which includes an EA output coupled to a PWM comparator of a buck-boost converter; a first transconductance amplifier to adjust a current at the EA output, the first transconductance amplifier operating in a constant voltage mode; and a second transconductance amplifier to adjust the current at the EA output, the second transconductance amplifier operating in a constant current mode. A first set of programmable registers is to store a first set of increasingly higher transconductance values. A second set of programmable registers is to store a second set of increasingly higher transconductance values. Control logic is to: cause the first transconductance amplifier to operate while sequentially using transconductance values stored in the first set of programmable registers; and cause the second transconductance amplifier to operate while sequentially using transconductance values stored in the second set of programmable registers.