Multi-Mode DC-DC Converter for Stable Battery Voltage
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Solution Overview
Problem
Electronic devices face challenges in seamlessly converting varying input voltages to a fixed output voltage, particularly when using battery power, as the battery voltage changes with charge level, requiring efficient voltage conversion methods to maintain stable operation.
Innovation Solution
The electronic device employs a direct voltage to direct voltage converter with a controller that selects between buck, boost, and buck-boost conversion modes based on input voltage levels, using switches, an inductor, capacitor, and resistors to generate feedback voltage and control the conversion process, ensuring stable output voltage across varying input conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a single voltage conversion mode is used, then the device structure is simple, but it cannot maintain stable output voltage when input voltage varies widely
Solution Approach 1:
The voltage conversion device integrates three conversion modes (buck, boost, and buck-boost) into a single circuit structure, allowing the same hardware to perform multiple voltage conversion functions. The controller selects the appropriate mode based on input voltage levels, enabling the device to maintain stable output voltage across a wide input voltage range without requiring separate conversion circuits for each mode.
2Ease of operation
If battery power is used, then portability is improved, but output voltage becomes unstable as battery charge level changes
Solution Approach 1:
The voltage conversion device dynamically adapts its conversion mode based on the input voltage level, which changes as the battery charge level varies. The controller continuously monitors the input voltage and switches between buck, boost, and buck-boost modes to maintain a stable output voltage, making the power supply system responsive to changing battery conditions while preserving portability.
3Loss of energy
If voltage conversion is performed efficiently, then energy loss is reduced, but conversion complexity increases
Solution Approach 1:
By using a single unified circuit structure that can operate in three different conversion modes, the device achieves efficient energy conversion across various input voltage conditions without requiring multiple separate conversion circuits. This multi-functional approach reduces overall system complexity while minimizing energy loss through optimal mode selection.
Solution Approach 2:
The device changes its operational parameters (conversion mode) based on input voltage levels to optimize energy efficiency. The controller adjusts the conversion mode parameter according to the battery charge level, ensuring minimal energy loss during voltage conversion while avoiding the need for complex multiple independent circuits.
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 solution enables seamless voltage conversion, maintaining a stable output voltage despite changes in input voltage, improving conversion efficiency and ensuring consistent device operation.
Implementation Method 1
an inductor connected between a first node and a second node
Implementation Method 2
a capacitor connected between the output node and the ground node
Data Source
AI summary
Disclosed is an electronic device, which includes a direct voltage to direct voltage converter, and a controller that receives first current information, second current information, an input voltage, and a feedback voltage from the direct voltage to direct voltage converter, controls the direct voltage to direct voltage converter based on the input voltage in one of a first mode, a second mode, or a third mode, controls the direct voltage to direct voltage converter based on the first current information and an output voltage such that buck conversion is performed in the first mode and the second mode, and controls the direct voltage to direct voltage converter based on the second current information and the output voltage such that boost conversion is performed in the second mode and the third mode.