Dual-Mode Regulator Circuit Detecting Inductor Load
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Solution Overview
Problem
Dual-mode regulator circuits fail to accurately determine the type of connected external circuit, leading to potential damage due to incorrect regulator selection and electromagnetic interference issues with switching regulators.
Innovation Solution
A dual-mode regulator circuit with a detection circuit, comprising a logic circuit and a comparator, that determines whether an inductor is connected between output terminals to switch between linear and switching regulator modes, ensuring safe operation and reducing electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a switching regulator is used to achieve high power conversion efficiency, then power efficiency is improved, but electromagnetic interference and circuit stability deteriorate
Solution Approach 1:
The system dynamically changes operating parameters by switching between linear regulator mode and switching regulator mode based on load conditions. The detection circuit monitors the external circuit type and controls the regulator to operate in linear mode during startup or light load, and switching mode during heavy load, thus optimizing efficiency while reducing EMI when necessary
Solution Approach 2:
The regulator system transitions from a static single-mode design to a dynamic dual-mode design. The control circuit continuously monitors system state and dynamically switches between linear and switching regulation modes, allowing the system to adapt its characteristics to match operational requirements and minimize harmful effects
2Adaptability or versatility
If a dual-mode regulator circuit is implemented to provide both linear and switching regulator options, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent combines both linear regulator and switching regulator circuits into a single integrated dual-mode regulator. The control circuit merges the functionality of detecting external circuit type, selecting appropriate mode, and switching between regulators, thereby providing adaptability while managing complexity through functional integration
Solution Approach 2:
The control circuit is designed with multi-functionality, serving as the detector, mode selector, and switch controller simultaneously. This universal approach allows a single circuit block to handle multiple tasks, reducing overall system complexity while maintaining dual-mode adaptability
3Ease of operation
If the regulator automatically detects external circuit type and switches modes, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The regulator system performs self-service by automatically detecting the external circuit type through the detection circuit and autonomously selecting the appropriate operating mode without user intervention. The control circuit monitors system state and self-adjusts the regulator mode, eliminating the need for manual configuration while managing complexity through integrated automation
Data Source
AI summary
The present disclosure illustrates a dual-mode regulator circuit comprising: a first output terminal; a second output terminal; a switching regulator circuit coupled to the first output terminal and comprising a first transistor coupled between the first output terminal and ground; a linear regulator circuit coupled to the second output terminal and comprising a second transistor coupled between the second output terminal and a power source; a detection circuit configured to turn on the first transistor in order to connect the first output terminal to ground, turn on the second transistor in order to connect the second output terminal to the power source, and then generate a detection signal indicating whether an inductor is connected between the first and second output terminals; and a logic circuit configured to activate the switching regulator circuit or the linear regulator circuit according to the detection signal.