Series Dynamic Load Power Control for Voltage Imbalance Regulation
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Solution Overview
Problem
As transistor density in digital circuits increases, so does current consumption, leading to power imbalances in series-connected processor cores, which can result in over- or under-voltage conditions damaging the dynamic loads, and existing power converter control methods fail to efficiently manage these fluctuations.
Innovation Solution
A controller monitors the voltage across dynamic loads and adjusts the operation of multiple power converter phases to maintain voltage within a threshold level by activating or deactivating phases, switching frequencies, and conduction modes, ensuring efficient and bidirectional current flow to prevent damage from power imbalances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If multiple processor cores are connected in series to increase power delivery efficiency, then power delivery efficiency is improved, but voltage imbalances occur that can damage dynamic loads
Solution Approach 1:
The patent implements a control system that continuously monitors voltage across each dynamic load in the series connection and provides feedback to adjust power distribution. This feedback mechanism detects voltage imbalances and redistributes power to maintain safe operating voltages, resolving the contradiction between series connection efficiency and voltage balance.
Solution Approach 2:
The system dynamically adjusts power distribution to each processor core based on real-time voltage conditions and power demands. By making the power delivery system adaptive rather than static, the system can optimize efficiency while preventing voltage imbalances from damaging loads.
2Reliability
If power converter phases are continuously activated to maintain voltage regulation, then voltage regulation is improved, but power loss increases
Solution Approach 1:
The patent employs periodic switching of power converter phases rather than continuous operation. Power phases are activated in alternating sequences based on load conditions, providing necessary voltage regulation while allowing inactive phases to reduce overall power consumption and losses.
Solution Approach 2:
The system activates only the necessary number of power converter phases required to maintain voltage regulation, rather than running all phases continuously. This partial action approach maintains adequate voltage control while minimizing power loss by keeping excess phases inactive during low-demand periods.
3Measurement precision
If power converter switching frequency is increased to improve voltage control precision, then voltage control precision is improved, but power loss increases
Solution Approach 1:
The patent implements dynamic switching frequency adjustment where the power converter operates at higher frequencies when precise voltage control is needed and reduces frequency when full precision is not required. This dynamic adaptation maintains voltage control precision when necessary while reducing switching losses during normal operation.
Data Source
AI summary
An apparatus includes a controller. The controller monitors a magnitude of voltage powering a first dynamic load disposed in a series circuit path of multiple dynamic loads. The controller compares the magnitude of the voltage to a reference voltage. Based on the comparing, the controller controls operation of multiple power converter phases in a power converter to maintain a magnitude of the voltage powering the first dynamic load.