Voltage Regulator Energy Control for Temperature-Dependent Load Transients
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Solution Overview
Problem
Existing voltage regulators for microprocessors face challenges in managing power dissipation and thermal management, particularly during transient load conditions, where traditional adaptive voltage position (AVP) control methods are insufficient in reducing voltage deviations and power dissipation.
Innovation Solution
A control circuit for a voltage regulator comprising an energy regulation circuit, a voltage reference regulation circuit, and a switching control signal generating circuit, which provides a regulation signal based on output voltage, output current, and a maximum energy reference that changes with ambient temperature. This circuit generates a switching control signal to adjust the output voltage and current, ensuring they satisfy specific relationships at different temperature values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional adaptive voltage position (AVP) control is used to reduce voltage deviations during load transient, then voltage stability is improved, but power dissipation increases rapidly with microprocessor development
Solution Approach 1:
The patent implements dynamic adjustment of the voltage regulator's output characteristics based on real-time temperature sensing. The control circuit dynamically modifies the relationship between output voltage and load current according to temperature conditions, transitioning from static AVP control to adaptive control that responds to thermal states. This allows the system to maintain voltage stability when needed while reducing power dissipation under thermal stress.
Solution Approach 2:
The patent changes the operational parameters of the voltage regulator by introducing temperature-dependent control. The control circuit adjusts key parameters such as output voltage level and voltage-current relationship based on temperature feedback. This parameter adaptation enables the system to optimize between voltage stability and power dissipation by selecting appropriate operating points according to thermal conditions.
2Productivity
If output voltage is maintained at high levels to ensure microprocessor performance, then processing speed is improved, but heat dissipation problems worsen
Solution Approach 1:
The patent employs temperature feedback control where a temperature sensing circuit continuously monitors the thermal state and feeds this information back to the control circuit. The control circuit then adjusts the voltage regulator's output characteristics based on this feedback, creating a closed-loop system that automatically balances performance and thermal management. This feedback mechanism ensures high voltage output for performance when cool, while automatically reducing power delivery when temperature rises.
Solution Approach 2:
The patent implements preliminary thermal protection by detecting temperature trends and preemptively adjusting voltage output before critical thermal conditions occur. The control circuit anticipates thermal buildup by monitoring temperature and proactively modifying operating parameters to prevent excessive heat generation, rather than reacting after overheating occurs. This preliminary action maintains performance within safe thermal boundaries.
Data Source
AI summary
A control circuit for a voltage regulator has an energy regulation circuit and a switching control circuit. The energy regulation circuit provides a regulation signal based on an output voltage, an output current, and a maximum energy reference. The maximum energy reference decreases with increasing of an ambient temperature and increases with decreasing of the ambient temperature. The switching control circuit provides a switching control signal based on the regulation signal to turn ON and turn OFF at least one switch of a plurality of switches of the voltage regulator, such that the output voltage and the output current satisfy a first relationship when the ambient temperature equals a first temperature value, and the output voltage and the output current satisfy a second relationship when the ambient temperature equals a second temperature value.