Multiphase Power Converter Current Redistribution for Thermal Mitigation
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Solution Overview
Problem
Thermal output in multi-phase switching power converters, resulting from I2R losses, can potentially damage the system and individual phases, especially at high demand currents, and existing solutions do not effectively mitigate these losses without compromising voltage regulation or telemetry.
Innovation Solution
Distribute current among multiple phases of a power converter by activating additional phases in response to temperature thresholds, reducing I2R losses and thermal output without affecting voltage regulation or telemetry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If additional phases are activated to distribute current and reduce thermal output, then thermal mitigation is improved, but device complexity increases
Solution Approach 1:
The power converter is divided into multiple independent phases, each capable of operating autonomously. By segmenting the current path across multiple phases and independently controlling their activation, the system distributes thermal load while maintaining manageable complexity through modular architecture
Solution Approach 2:
The system dynamically adjusts the number of active phases based on real-time temperature feedback from distributed sensors. The control circuit responds to temperature conditions by activating or deactivating specific phases, creating a dynamic thermal management system that adapts to changing load and thermal conditions
2Loss of energy
If current is distributed among multiple phases to reduce I2R losses, then energy efficiency is improved, but control complexity increases
Solution Approach 1:
Distributed temperature sensors provide real-time feedback to the control circuit about thermal conditions in each phase. This feedback enables the control circuit to make informed decisions about phase activation and current distribution, optimizing I2R losses while maintaining simple control logic based on temperature thresholds
Solution Approach 2:
The system changes operational parameters by dynamically adjusting which phases are active based on temperature conditions. By altering the configuration of active phases, the system optimizes current distribution to minimize I2R losses without requiring complex continuous control algorithms
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Significantly reduces thermal output and I2R losses in individual phases by distributing current, maintaining voltage regulation and telemetry integrity.
Implementation Method 1
A plurality of temperature sensors distributed among the plurality of phases
Implementation Method 2
Thermal output in multi-phase switching power converters, resulting from I2R losses
Data Source
AI summary
Thermal mitigation using current redistribution is disclosed. A power converter includes plurality of phases configured to provide a demand current to a load circuit. The power converter further includes a control circuit configured to activate selected ones of the plurality of phases based on the demand current. A plurality of temperature sensors distributed among the plurality of phases. A state machine is coupled to receive temperature readings from ones of the plurality of temperature sensors. The state machine is configured to cause the control circuit to increase a number of active ones of the plurality of phases in response to receiving a temperature reading from one of the temperature sensors that exceeds a first temperature threshold.