DC-to-DC Converter Segmented Buck Boost Circuits
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Solution Overview
Problem
Conventional DC-to-DC converters with boost/buck functions face challenges in miniaturization due to large transformer size and low efficiency, as they burden all output power and lack efficient voltage regulation for miniaturized electronic devices.
Innovation Solution
A DC-to-DC converter design featuring independent buck and boost circuits, where a control unit generates control signals to manage voltage conversion, allowing the buck circuit to perform buck or boost processes based on input and output voltage conditions, and the boost circuit to transmit or generate power voltage efficiently, reducing the transformer size and enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single transformer with isolation function is used to achieve both boost and buck functions, then the converter can provide stable power voltage, but the transformer size becomes very large and efficiency decreases
Solution Approach 1:
The patent divides the single transformer into two separate transformers: a first transformer for the buck circuit and a second transformer for the boost circuit. This segmentation allows each transformer to be optimized for its specific function, reducing the overall size while maintaining the isolation function and stable power voltage output.
Solution Approach 2:
The patent implements dynamic switching between buck and boost modes based on the relationship between input voltage and output voltage requirements. The control circuit dynamically selects which circuit to activate, allowing the system to adapt to different operating conditions and maintain high efficiency across varying load and voltage scenarios.
2Adaptability or versatility
If a single transformer handles all output power, then the converter achieves boost/buck function, but the transformer size increases and efficiency decreases
Solution Approach 1:
The power processing function is segmented into two independent circuits: a buck circuit with its own transformer for step-down conversion, and a boost circuit with its own transformer for step-up conversion. Each circuit handles specific power conversion tasks, reducing the burden on individual transformers and improving overall conversion efficiency by matching the appropriate circuit to the voltage conversion needs.
Solution Approach 2:
The system changes operational parameters dynamically by switching between buck and boost modes based on voltage requirements. When input voltage is higher than output voltage, the buck circuit operates; when input voltage is lower, the boost circuit operates. This parameter-based switching optimizes efficiency across different operating conditions.
3Ease of operation
If the transformer handles all power conversion, then the converter achieves voltage regulation, but the device cannot be miniaturized
Solution Approach 1:
The voltage regulation function is segmented between two specialized transformers, each optimized for specific voltage conversion ratios. This segmentation allows for smaller, more efficient transformers compared to a single large transformer handling all conversion requirements, enabling device miniaturization while maintaining effective voltage regulation.
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 design achieves high efficiency and miniaturization by optimizing buck and boost processes, improving power management and reducing transformer size, enabling the DC-to-DC converter to efficiently regulate power voltage in miniaturized electronic devices.
Implementation Method 1
a transformer TX having an isolation function
Implementation Method 2
a switch SW, a capacitor C, a diode D
Data Source
AI summary
A DC-to-DC converter adapted for generating a power voltage required by a load and including a buck circuit and a boost circuit is provided. The buck circuit is used for receiving a DC input voltage, and outputting the power voltage by performing a buck process to the DC input voltage, or directly outputting the DC input voltage according to a first control signal. The boost circuit is used for receiving the power voltage or the DC input voltage both output from the buck circuit, and outputting the power voltage to the load by performing a boost process to the DC input voltage output from the buck circuit, or directly outputting the power voltage output from the buck circuit to the load according to a second control signal.