Dynamic Voltage Threshold Control for Regulator Output Protection
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Solution Overview
Problem
Voltage regulators often fail to maintain stable output voltage due to faults or external fluctuations, leading to potential overvoltage or undervoltage issues, which existing designs cannot effectively address.
Innovation Solution
An output voltage protection controller using a comparator circuit and voltage adjustment circuit dynamically adjusts the voltage detection threshold by injecting an offset voltage based on feedback voltage and inductor current sensing signals, preventing unwanted overshoot or undershoot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed voltage detection threshold is used in existing voltage regulator designs, then the device complexity is reduced, but the reliability of output voltage protection deteriorates because the regulator cannot adapt to dynamic load conditions and may fail to prevent overvoltage or undervoltage issues
Solution Approach 1:
The patent applies the Dynamics principle by transitioning from a fixed voltage detection threshold to a dynamic threshold that automatically adjusts based on real-time inductor current conditions. The voltage detection threshold is modulated by a current-proportional signal, enabling the protection circuit to adapt its detection level according to the actual load state, thereby improving reliability without requiring complex external adjustment mechanisms.
Solution Approach 2:
The patent implements the Feedback principle by incorporating a sensing circuit that continuously monitors inductor current and feeds this information back to the voltage detection threshold. This feedback loop allows the system to automatically adjust the detection threshold based on actual operating conditions, ensuring reliable protection while maintaining a relatively simple overall device structure through integrated feedback control.
2Reliability
If the voltage detection threshold is dynamically adjusted based on inductor current, then the reliability of voltage protection is improved, but the device complexity increases due to additional voltage adjustment circuitry
Solution Approach 1:
The patent applies the Merging principle by integrating the voltage adjustment functionality directly into the existing protection controller architecture. The current-proportional signal generation and threshold modulation functions are combined with the voltage detection circuit, eliminating the need for separate external adjustment components and reducing overall device complexity while maintaining improved protection reliability.
Solution Approach 2:
The patent implements the Self-service principle by designing a system where the voltage detection threshold automatically adjusts itself based on internal current sensing, without requiring external control signals or additional complex circuitry. The protection circuit serves itself by using its own current information to dynamically set appropriate detection levels, thereby improving reliability while minimizing added complexity.
3Measurement precision
If a constant voltage detection threshold is used, then the ease of operation is maintained, but the measurement precision of voltage status detection deteriorates under varying load conditions
Solution Approach 1:
The patent applies the Dynamics principle by making the voltage detection threshold dynamic rather than constant, allowing it to automatically adapt to varying load conditions. This dynamic adjustment enables precise detection of abnormal voltage states across different operating points while maintaining ease of operation, as the system self-adjusts without requiring user intervention or complex configuration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution ensures smaller dynamic damping and maintains voltage regulator stability, effectively preventing overvoltage and undervoltage conditions by dynamically adjusting the detection threshold.
Implementation Method 1
a comparator circuit arranged to compare a first voltage signal with a second voltage signal to generate a control signal
Implementation Method 2
a voltage adjustment circuit arranged to inject an offset voltage to the second voltage signal for dynamically adjusting the second voltage signal
Implementation Method 3
one of the first voltage signal and the second voltage signal is a feedback voltage derived from an output voltage of the voltage regulator
Data Source
AI summary
An output voltage protection controller includes a comparator circuit and a voltage adjustment circuit. The comparator circuit compares a first voltage signal with a second voltage signal to generate a control signal that controls output voltage protection of a voltage regulator, wherein one of the first voltage signal and the second voltage signal is a feedback voltage derived from an output voltage of the voltage regulator, and another of the first voltage signal and the second voltage signal is a voltage detection threshold. The voltage adjustment circuit injects an offset voltage to the second voltage signal for dynamically adjusting the second voltage signal during a period in which a target regulated voltage level of the output voltage is a constant.