SIMO Bidirectional Dual-Boost Power Converter Circuit
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Solution Overview
Problem
Power converter circuits face challenges in providing increased complexity while maintaining a small size and efficiency, particularly in generating multiple regulated voltages, as existing multiple inductor multiple output (MIMO) and single inductor multiple output (SIMO) topologies are either too large or inefficient.
Innovation Solution
A switching power converter circuit with a SIMO topology using a single inductor and bidirectional current, where the inductor current flows in opposite directions to generate two circuit supply rails with positive voltages higher than the input voltage, enhancing efficiency and reducing circuit area through the use of switch circuits and capacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple inductor multiple output (MIMO) topology is used to generate multiple regulated voltages, then the power converter can provide multiple circuit supply rails, but the circuit area increases significantly
Solution Approach 1:
The patent merges multiple inductor functions into a single shared inductor that serves multiple output rails. The single inductor is alternately connected to different output capacitors through switching elements, allowing one inductor to perform the energy storage and voltage boosting function for multiple output rails sequentially, thereby reducing the total circuit area while maintaining multiple regulated voltage outputs.
Solution Approach 2:
The patent employs dynamic switching to alternate the connection of the single inductor between different output rails. Control circuitry dynamically switches the inductor connections in alternating phases, enabling the same inductor to serve multiple outputs at different time intervals. This dynamic operation allows one inductor to replace what would traditionally require multiple inductors, reducing circuit area while maintaining versatility.
2Area of stationary object
If single inductor multiple output (SIMO) topology is used to reduce circuit area, then the circuit footprint is smaller, but energy efficiency deteriorates due to increased losses
Solution Approach 1:
The patent uses dynamic switching to alternate the single inductor's connection between different output rails in a controlled manner. This dynamic operation ensures that the inductor operates in optimal conditions for each output phase, minimizing energy losses. The switching elements and control circuitry manage the transitions efficiently, preventing excessive losses despite the shared inductor configuration.
Solution Approach 2:
The patent implements periodic switching cycles where the single inductor is systematically connected to different output rails in alternating phases. This periodic action allows the inductor to charge and discharge in a controlled rhythm for each output, ensuring efficient energy transfer and minimizing losses. The regular switching pattern enables predictable and optimized energy management across multiple outputs.
3Area of stationary object
If traditional SIMO topology is used, then circuit area is reduced, but energy efficiency remains insufficient due to loss mechanisms
Solution Approach 1:
The patent changes the operational parameters of the single inductor by dynamically adjusting its connection timing and switching frequency based on the specific requirements of each output rail. This parameter optimization minimizes energy losses during transfer. Additionally, the control circuitry adjusts switching parameters to maintain optimal inductor current levels, reducing both conduction and switching losses while keeping the circuit area small.
Solution Approach 2:
The patent incorporates control circuitry that monitors the operation of the single inductor and the output voltages, providing feedback to optimize switching timing and minimize losses. This feedback mechanism allows the system to adjust switching parameters in real-time to maintain high efficiency, compensating for the inherent losses of using a shared inductor configuration.
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 achieves improved energy efficiency and a compact circuit design by generating multiple regulated voltages with reduced losses and smaller footprint, suitable for complex electronic systems.
Implementation Method 1
charging an inductor using energy provided at an input port during a first phase of a first operating cycle, transferring energy from the inductor to a first circuit supply rail during a second phase of the first operating cycle
Data Source
AI summary
A switching power converter circuit comprises an input port, a first circuit supply rail having a first positive voltage greater than circuit ground, a second circuit supply rail having a second positive voltage greater than circuit ground, and an inductor electrically coupled to the input port, wherein inductor current flows in a first direction through the inductor to generate the first circuit supply rail and flows in an opposite direction through the inductor to generate the second circuit supply rail.