DC-DC Converter Inductor Network for Cross-Regulation Control
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Solution Overview
Problem
Existing DC-DC converters face challenges in maintaining accurate and stable output voltages across multiple terminals due to sudden changes in load, leading to cross-regulation issues, which affect the reliability of electronic devices.
Innovation Solution
A DC-DC converter system that includes a first and second inductor, an inductor network unit, and a controller to determine cross-regulation and switch between serial and isolation modes, connecting or isolating the inductors based on current thresholds and reference times to manage output voltages effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple output terminals are used to generate various output voltages, then the versatility and functionality of the DC-DC converter is improved, but cross-regulation occurs between output terminals leading to voltage instability
Solution Approach 1:
The patent segments the output stage into multiple independent output terminals (first output terminal and second output terminal) with separate switching circuits (first output switch and second output switch). This segmentation allows each output to be independently controlled, preventing cross-regulation between outputs while maintaining the ability to generate multiple voltage levels simultaneously.
Solution Approach 2:
The patent implements dynamic control of switching elements (first output switch and second output switch) based on detected output voltage levels and load conditions. The controller dynamically adjusts the switching states to maintain accurate output voltages despite load changes, resolving the contradiction between versatility and voltage stability through real-time adaptive control.
2Power
If the inductor current is increased to meet sudden load changes, then the power delivery capability is improved, but the inductor current exceeds threshold values causing harmful effects
Solution Approach 1:
The patent employs feedback control by detecting the output voltage level and comparing it with reference values. Based on this feedback, the controller adjusts the switching elements to regulate the inductor current, ensuring it meets load demands without exceeding safe threshold values. This closed-loop feedback mechanism resolves the contradiction between power delivery and current limitation.
Solution Approach 2:
The patent implements preliminary protective action by detecting when inductor current approaches threshold values and preemptively adjusting the switching elements to prevent excessive current conditions. This anticipatory control prevents harmful effects before they occur while maintaining adequate power delivery capability.
Data Source
AI summary
Provided is DC-DC converter including a first inductor configured to output a first inductor current based on an input voltage, a second inductor configured to output a second inductor current based on the input voltage, an output network unit configured to provide a first output voltage to a first output terminal and provide a second output voltage to a second output terminal based on the first inductor current or the second inductor current, a controller configured to determine cross-regulation with respect to the first output terminal and the second output terminal and generate a mode signal based on the determination, and an inductor network unit configured to connect the first inductor and the second inductor based on the mode signal or electrically isolate the first inductor and the second inductor.