Power Path Coupling Detection for Synchronized Card Enablement

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Solution Overview

Problem

Existing information handling systems lack protection against accidental asynchronous power domain enablement between main and auxiliary power paths, which can lead to potential damage due to decoupled power states in peripheral resources like SmartNICs and DPUs.

Innovation Solution

Implement a management controller to observe and communicate stimuli via detection signals, querying input/output interfaces to ensure synchronized power domain enablement across both paths, independent of the host system's power state.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the main power path and auxiliary power path are operated independently, then the peripheral resource can function with decoupled power states (enabling independent operation and power savings), but there is risk of accidental asynchronous power domain enablement causing damage

Engineering Contradiction:

Improveindependent operation capabilityVSAvoidpower domain synchronization

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The management controller continuously monitors the power states of both main and auxiliary power domains through detection signals, providing feedback about the coupling status. This feedback mechanism enables the system to detect asynchronous enablement conditions and trigger appropriate protective actions, resolving the contradiction by maintaining independent operation capability while ensuring power domain synchronization through active monitoring.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The management controller acts as an intermediary between the main power path and auxiliary power path, mediating their interaction through detection signals and coordination logic. This intermediary component enables independent operation of each power domain while preventing harmful asynchronous enablement by coordinating power state transitions, thus resolving the reliability concern.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If traditional card designs assume both power paths are on or off together, then device complexity is reduced, but protection against asynchronous power domain enablement is lost

Engineering Contradiction:

Improvepower management designVSAvoiddamage from asynchronous enablement

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The management controller serves as an intermediary that adds protection functionality without fundamentally redesigning the power management architecture. It introduces detection signals and coordination mechanisms that prevent asynchronous enablement damage while maintaining the simplicity of traditional card designs, resolving the contradiction between device complexity and protection against harmful factors.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system performs preliminary detection of cable presence and power domain coupling status before enabling power delivery. This preliminary action prevents asynchronous enablement damage by ensuring both power paths are properly synchronized before activation, adding protection without significantly increasing device complexity.

Inventive Principle:

Principle #10Preliminary action

3Loss of energy

If power is removed from peripheral resources to save idle power, then energy efficiency is improved, but the system lacks protection when power states become decoupled

Engineering Contradiction:

Improveidle power consumptionVSAvoidpower state coordination

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

The management controller provides continuous feedback monitoring of power domain coupling status, enabling the system to safely remove power from peripheral resources during idle states while maintaining protection against asynchronous enablement. This feedback mechanism ensures that power can be efficiently managed without compromising reliability.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The power management system dynamically adjusts power delivery based on detected coupling conditions and operational needs. This dynamic approach enables idle power savings by removing power when appropriate while maintaining protection mechanisms that adapt to changing power states, resolving the contradiction between energy efficiency and reliability.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20250390407A1Systems and methods for power domain power coupling determination of conditional enablement

Publication Date: 2025.12.25 DELL PROD LP

AI summary

In an information handling system comprising a host system, an information handling resource coupled to the host system and comprising a main power path via a card electromechanical connector and an auxiliary power path via a cable connector, and a management controller coupled to the host system and the information handling resource and configured, a method may include, by the management controller: observing, via a primary function of a card cable presence detection signal of the information handling resource, an indication that the auxiliary power path is coupled to a source of electrical energy via a cable; responsive to observing the card cable presence detection signal, communicating a stimulus to the information handling resource via a secondary function of the card cable presence detection signal; and querying an input/output interface of the information handling resource to determine a response of the information handling resource to the stimulus.