Voltage Conversion Circuit Dynamic Buck Boost Mode Switching
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Solution Overview
Problem
Existing voltage conversion circuits, such as buck and boost converters, face challenges in minimizing conduction resistor and layout area, leading to inefficiencies in energy consumption and increased complexity.
Innovation Solution
A voltage conversion circuit comprising an inductor, switch transistors, resistors, and a P-type transistor, along with a voltage comparator and multiplexer, which dynamically adjusts the operation of the P-type transistor between saturation and linear regions based on input and output voltage comparisons to optimize energy storage and release, reducing conduction resistor and layout area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional buck and boost converters are used for voltage conversion, then voltage regulation can be achieved, but conduction resistor and layout area increase leading to higher energy consumption
Solution Approach 1:
The circuit dynamically switches between buck and boost conversion modes based on the relationship between input voltage and output voltage. The control circuit adjusts the operating state of the circuit to match actual voltage conversion needs, avoiding the energy losses associated with fixed-architecture converters. This dynamic adaptation allows the circuit to operate in the most efficient mode for any given voltage condition.
Solution Approach 2:
The voltage conversion circuit integrates both buck and boost conversion capabilities into a single unified circuit architecture. By using shared components (inductor, capacitors, switches) that can operate in different configurations, the circuit eliminates the need for separate buck and boost converters, thereby reducing total conduction resistance and layout area while maintaining the ability to handle both step-down and step-up voltage conversion scenarios.
2Adaptability or versatility
If separate buck and boost converters are used to handle different voltage conversion scenarios, then adaptability is improved, but device complexity and energy loss increase
Solution Approach 1:
The patent merges buck and boost conversion functions into a single integrated circuit. The same inductor, capacitors, and switching elements are used for both conversion modes, eliminating the conduction losses that would result from having two separate converter paths. The control circuit intelligently routes current through the appropriate configuration based on whether voltage step-down or step-up is required.
Solution Approach 2:
The circuit employs dynamic control to switch between buck and boost operating modes based on real-time voltage conditions. The control circuit monitors the relationship between input and output voltages and adjusts the switching states accordingly, ensuring the circuit operates in the optimal mode for current conditions, thereby maintaining adaptability while minimizing energy losses associated with fixed-architecture converters.
3Adaptability or versatility
If separate buck and boost converters are used for different voltage scenarios, then versatility is improved, but layout area increases
Solution Approach 1:
The circuit combines buck and boost conversion functionality into a single shared architecture. Common components including the inductor, input and output capacitors, and switching elements are shared between both conversion modes. This merging approach reduces the total component count and allows for a more compact layout compared to implementing separate buck and boost converter circuits, thereby reducing overall layout area while maintaining full voltage conversion versatility.
Solution Approach 2:
The voltage conversion circuit is designed as a universal converter that can perform both buck and boost operations using the same physical components. The inductor, capacitors, and switches serve dual purposes depending on the operating mode, maximizing component utilization and minimizing the space required for the circuit. This multi-functional design achieves full voltage conversion adaptability within a reduced footprint.
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 configuration effectively reduces energy consumption and increases efficiency by minimizing conduction resistor and layout area, enhancing the overall performance of voltage conversion processes.
Implementation Method 1
One terminal of the inductor is electrically connected to an input voltage. A drain of the first switch transistor is connected to another terminal of the inductor
Implementation Method 2
a source of the third transistor is connected another terminal of the inductor, a gate of the third transistor receives a control signal and accordingly determines whether to enter into a saturation region or a linear region
Data Source
AI summary
A voltage conversion circuit is disclosed. The voltage conversion circuit includes an inductor, a first switch transistor, a second switch transistor, a first resistor, a second resistor and a P type transistor. When an input voltage is larger than an output voltage and a switch signal is transited to low voltage level, a control signal is a clamping voltage and the P type transistor enters into a saturation region, so that a drain voltage of the first switch transistor is a sum of the clamping voltage and a source-gate voltage of the P type transistor. When an output voltage is larger than an input voltage and a switch signal is changed to low voltage level, the control signal is the switch signal and the P type transistor enters into a linear region, so that a drain voltage of the first switch transistor is sum of the output voltage and voltage-drop of the P type transistor.