Static Phase Shedding Voltage Regulator Efficiency
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Solution Overview
Problem
Current voltage regulators for computer motherboards are inefficient at lighter loads due to being designed for high-performance CPUs, leading to poor power efficiency when lower performance processors are installed, as they cannot dynamically adjust to varying power needs in real-time.
Innovation Solution
Implementing static phase shedding techniques that use circuit identifiers to select the number of active phases for multiphase voltage regulators, allowing for configuration based on processor identifiers during system start-up, and optionally combining with dynamic phase shedding for further efficiency during low power modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If voltage regulators are designed for high-performance CPUs with maximum power consumption, then they can support the highest performance CPU, but they suffer from poor power efficiency at lighter loads
Solution Approach 1:
The patent implements dynamic phase shedding that allows the voltage regulator to transition between different operational states based on real-time load conditions. The regulator can dynamically reduce the number of active phases from the maximum number (N) to fewer phases (M) when load decreases, and vice versa. This dynamic adaptation resolves the contradiction by making the power support capability flexible rather than fixed, allowing the system to maintain high power efficiency at light loads while preserving the ability to support maximum power consumption when needed.
2Device complexity
If a fixed number of phases are used in the voltage regulator, then the design is simple, but it cannot adapt to different processor power requirements
Solution Approach 1:
The patent employs dynamic phase shedding control that enables the voltage regulator to adapt its number of active phases based on detected processor power requirements. The controller monitors load conditions and dynamically adjusts the phase configuration, allowing a single regulator design to serve multiple processor types with varying power needs. This dynamic capability provides adaptability without requiring multiple fixed-design regulators.
Solution Approach 2:
The patent changes the operational parameter of the voltage regulator by dynamically adjusting the number of active phases (from M to N phases) based on processor identification and load detection. This parameter change allows the same physical regulator hardware to operate in different configuration modes, achieving versatility across different processor types while maintaining a single standardized design.
3Loss of energy
If dynamic phase shedding is implemented to reduce phases at low load, then power efficiency improves, but there is not enough time for the VR to respond adequately to CPU transient operation
Solution Approach 1:
The patent implements static phase shedding that determines the appropriate number of phases (M or N) in advance based on processor identification during system initialization. By pre-configuring the phase count before the CPU begins operation, the system eliminates the response time delay that would occur if phase adjustment had to happen dynamically during transient operations. This preliminary action ensures both power efficiency and fast response capability.
Solution Approach 2:
The patent uses processor identifier information to pre-determine the optimal phase configuration (M or N phases) before the CPU starts operating. This advance determination allows the voltage regulator to be properly configured from the outset, avoiding any response time penalties during transient operations while still achieving the power efficiency benefits of phase shedding.
Data Source
AI summary
Systems and methods are disclosed that provide static phase shedding techniques to improve the efficiency of multi-phase voltage regulators within information handling systems by selecting the number of active phases for the multi-phase voltage regulators using circuit identifiers (IDs) for circuitry configured to be powered by the multi-phase voltage regulators, such as central processing units (CPUs). In one embodiment, processor identifier information related to installed CPUs is used to control the voltage regulator (VR) phase number to provide static phase shedding. This VR control can be implemented in a variety of ways, including the use of conventional analog multi-phase VR controllers and/or digital VR controllers. Dynamic phase shedding can also be used in conjunction with this static phase shedding to further reduce the number of active phases when a processor operates in a low power mode.