Isolated Conversion Circuit Topology for High-Ratio PMU Efficiency
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Solution Overview
Problem
As electronic devices evolve with improved hardware specifications and performance, the increasing battery voltage and decreasing load voltage requirements lead to higher transformation ratios for PMUs, resulting in increased losses and overall power consumption, necessitating a more efficient power management solution.
Innovation Solution
A conversion circuit with two branch circuits connected in series and parallel configurations, allowing for adjustable transformation ratios and independent operation frequencies, reducing losses and improving integration by using isolation and conversion units with adjustable inductors and capacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the transformation ratio of the PMU is increased to handle higher battery voltage and lower load voltage, then the voltage conversion capability is improved, but the loss of the PMU increases
Solution Approach 1:
The PMU is divided into multiple independent branch circuits, each handling a portion of the power conversion task. This segmentation allows each branch to operate at optimized transformation ratios, reducing overall energy loss while maintaining the ability to handle the full voltage range required by the load.
Solution Approach 2:
The system dynamically adjusts the operation of different branch circuits based on real-time voltage and current conditions. By selectively activating or deactivating specific branches, the system optimizes the transformation ratio dynamically, minimizing losses while adapting to varying battery voltage and load requirements.
2Adaptability or versatility
If multiple PMUs are used to serve different loads, then the power management flexibility is improved, but the overall power consumption increases due to cumulative losses
Solution Approach 1:
Multiple branch circuits are merged into a single integrated PMU structure, sharing common control logic and power pathways. This consolidation reduces the cumulative losses that would occur in separate PMUs while preserving the flexibility to independently manage power to different loads through the branch circuit configuration.
Solution Approach 2:
The branch circuits are designed with universal functionality, where each branch can serve multiple loads or be configured for specific power management tasks. This multi-functionality allows a single PMU to replace multiple dedicated PMUs, reducing overall power consumption while maintaining power management flexibility.
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
The solution enhances the efficiency and integration of PMUs by minimizing losses and optimizing power transmission, adapting to varying input and output voltage demands.
Implementation Method 1
an isolation unit and a conversion unit. The high potential input end of the conversion unit is connected to the high potential output end of the isolation unit
Implementation Method 2
the conversion unit may convert the first input voltage into an output voltage of the conversion circuit
Data Source
AI summary
This application provides a conversion circuit, a switch-mode power supply, and an electronic device. The conversion circuit mainly includes a first branch circuit and a second branch circuit. Input sides of the first branch circuit and the second branch circuit are connected in series, and output sides of the first branch circuit and the second branch circuit are connected in parallel; or input sides of the first branch circuit and the second branch circuit are connected in parallel, and output sides of the first branch circuit and the second branch circuit are connected in series. This implementation helps improve efficiency of the conversion circuit. When an inductor is disposed in the conversion circuit, a size of the inductor is further reduced, to improve integration.