Interleaved Multi-Stage Phase Array Voltage Regulator
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing voltage regulators in information handling systems face inefficiencies when reducing output power, as they often require shedding phases, leading to discontinuities and ripples in output voltage, which slow down system operations.
Innovation Solution
An interleaved, multi-stage phase array voltage regulator with a voltage control loop and current control loop that adjusts the duty cycle and active power stages to maintain consistent output without phase shedding, allowing for flexible power adjustments based on load requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If phase shedding is used to reduce output power in existing voltage regulators, then power consumption is reduced, but output voltage stability deteriorates due to discontinuities and ripples
Solution Approach 1:
The voltage regulator is divided into multiple interleaved phase arrays, each with multiple power stages. Instead of shedding entire phases, the system segments the power delivery into finer granular power stages within phases, allowing smoother power reduction by deactivating individual stages rather than entire phases.
Solution Approach 2:
The control system dynamically adjusts the duty cycle of individual power stages within phase arrays based on load requirements. This dynamic control allows continuous power adjustment without the discrete phase shedding approach, maintaining output voltage stability while reducing power consumption.
2Power
If phase shedding is used to adjust output power, then power output is reduced, but system speed deteriorates due to delays in voltage stabilization
Solution Approach 1:
Multiple phase arrays with multiple power stages are pre-configured and ready to operate. When load changes occur, the control system can quickly activate or deactivate specific power stages without the delays associated with phase shedding, enabling faster voltage stabilization and improving system response speed.
Solution Approach 2:
The interleaved phase arrays provide continuous power delivery by ensuring that as some power stages are deactivated, others remain active or can quickly take over. This continuity eliminates the interruptions and delays inherent in phase shedding, maintaining both power flexibility and fast stabilization.
3Device complexity
If traditional phase arrays are used, then device complexity is reduced, but control precision deteriorates due to asymmetries and ripples
Solution Approach 1:
The system changes the control parameter from phase-level switching to power-stage-level duty cycle control. By controlling the duty cycle of individual power stages within phase arrays, the system achieves near-linear control over output current, significantly improving control precision while maintaining a manageable device structure through the interleaved architecture.
Data Source
AI summary
In accordance with the present disclosure, a system and method for an interleaved, multi-stage phase array voltage regulator is described. The interleaved, multi-stage phase array voltage regulator includes a first phase array with a plurality of first power stages and a second phase array with a plurality of second power stages. The interleaved, multi-stage phase array voltage regulator may also include a voltage control loop that at least partially controls a duty cycle of the first phase array and the second phase array. Also, the interleaved, multi-stage phase array voltage regulator may include a current control loop that at least partially controls which of the plurality of first power stages and second power stages are active.