Servo AVP DC-DC Converter Voltage Regulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
DC-DC switching converters face challenges in maintaining a constant output voltage across varying load conditions, leading to undesired voltage fluctuations, which existing solutions like Adaptive Voltage Positioning (AVP) struggle to address effectively without affecting the converter's modes of operation or requiring current sensing and filtering.
Innovation Solution
Implementing a servo block feedback mechanism with Adaptive Voltage Positioning (AVP) that modifies the reference voltage to achieve high DC gain and programmable load regulation by injecting a measured correction back into the output feedback or reference voltage, utilizing a Proportional Integral Loop (PID) for precise control, without affecting the switching converter's modes of operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If Adaptive Voltage Positioning (AVP) is used to regulate output voltage under varying current loads, then voltage stability is improved, but device complexity increases due to additional sensing and filtering requirements
Solution Approach 1:
The patent extracts the voltage correction function from complex current sensing and filtering circuits, implementing it instead through a dedicated servo block that directly processes voltage feedback signals. This separation removes the need for complicated current sensing hardware while achieving the same voltage regulation objective.
Solution Approach 2:
The servo block is designed to perform multiple functions: it provides both the primary voltage regulation and the adaptive voltage positioning functionality that compensates for load variations. This multi-functionality eliminates the need for separate sensing and filtering circuits, reducing overall device complexity while maintaining voltage stability.
2Measurement precision
If a servo block feedback mechanism with AVP is implemented to achieve high DC gain and programmable load regulation, then voltage regulation precision is improved, but device complexity increases
Solution Approach 1:
The patent merges the servo block feedback mechanism with the AVP functionality into a single integrated control structure. The servo block receives feedback signals and simultaneously performs both precise voltage regulation and adaptive voltage positioning, achieving high DC gain and programmable load regulation without requiring separate complex circuits for each function.
Solution Approach 2:
The implementation uses feedback signals from the output voltage to drive the servo block, which then generates correction signals that are injected back into the control loop. This feedback mechanism enables precise voltage regulation and programmable load regulation while keeping the device complexity manageable through efficient signal reuse.
3Adaptability or versatility
If correction is injected back to reference voltage or output feedback voltage to achieve programmable load regulation, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent introduces an intermediary correction signal from the servo block that can be selectively injected into either the reference voltage path or the output feedback voltage path. This intermediary approach provides programmable load regulation adaptability while keeping the injection circuitry simple, as it merely adds or subtracts voltage signals at existing nodes in the control loop.
Data Source
AI summary
An object of this disclosure is to implement a Buck, Boost, or other switching converter, with a circuit to supply a reference voltage and Adaptive Voltage Positioning (AVP), by means of a servo and programmable load regulation. The reference voltage is modified, achieving a high DC gain, using a servo to remove any DC offset at the output of the switching converter. The correction implemented by the servo is measured, and a programmable fraction of the correction is injected back on either the reference voltage or the output feedback voltage. To accomplish at least one of these objects, a Buck, Boost, or other switching converter is implemented, consisting of an output stage driven by switching logic, with a servo configured between the reference voltage and the control loops of the Buck converter. The AVP function is implemented on either the reference voltage or output feedback voltage.