Efficient DC-to-DC Voltage Conversion with Single Inductor
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Summary
Problems
Buck-boost converters have low power conversion efficiency due to high conduction and switching losses, limiting their effectiveness in applications requiring a wide range of power conversion ratios.
Innovation solutions
A voltage converter circuit utilizing a single inductor and capacitor, with strategically controlled switches to manage power paths in step-up and step-down modes, ensuring continuous output current and reduced switching losses by maintaining the inductor and capacitor connected at all times, and using a switching controller to adjust the duty ratio for optimal voltage conversion.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a buck-boost converter is used to achieve a wide range of power conversion ratios, then the adaptability is improved, but the power conversion efficiency deteriorates due to high conduction and switching losses
Why choose this principle:
The circuit segments the power conversion process into distinct step-up and step-down modes with dedicated power paths for each mode. By separating the operation into non-overlapping time intervals with mode-specific configurations, the circuit optimizes efficiency for each conversion direction while maintaining wide adaptability through controller-selected modes
Principle concept:
If a buck-boost converter is used to achieve a wide range of power conversion ratios, then the adaptability is improved, but the power conversion efficiency deteriorates due to high conduction and switching losses
Why choose this principle:
The circuit dynamically switches between step-up and step-down modes based on the desired output voltage relative to input voltage. The controller adjusts the duty ratio and selects appropriate power paths in real-time, enabling the circuit to adapt to different conversion requirements while maintaining high efficiency through optimal path selection
Application Domain
Data Source
AI summary:
A voltage converter circuit utilizing a single inductor and capacitor, with strategically controlled switches to manage power paths in step-up and step-down modes, ensuring continuous output current and reduced switching losses by maintaining the inductor and capacitor connected at all times, and using a switching controller to adjust the duty ratio for optimal voltage conversion.
Abstract
A voltage converter circuit includes a capacitor having a first end selectively connected to an input power source through a first input switch and a second end selectively connected to the input power source through a second input switch, and a single inductor configured to generate an output voltage in response to a voltage of a node between the single inductor and the first input switch, selectively connect the input power source through the first input switch at the node, and connect the first end of the capacitor at the node.