Two-Stage Switched-Capacitor Power Conversion for Stable Digital Loads
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Solution Overview
Problem
Digital circuits require power with specific characteristics, and existing power converters struggle to deliver power in a form that meets these requirements, leading to potential shutdowns when the input power does not meet these specifications.
Innovation Solution
A power converter apparatus with a control system and series-connected first and second stages, where one stage is either a switching network or a regulating network, and the other is a regulating or switching network, allowing for voltage transformation and regulation, with various configurations including cascade multipliers, buck converters, and magnetic filters to adapt power to digital circuit needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-stage power converter is used, then the device complexity is reduced, but the ability to meet specific digital circuit power requirements is insufficient
Solution Approach 1:
The power converter is divided into two distinct stages: a first stage (switching network or regulating network) and a second stage (regulating network or switching network). This segmentation allows each stage to perform specific functions, with the first stage performing voltage transformation and the second stage providing precise regulation, thereby meeting the strict power requirements of digital circuits while maintaining a manageable overall system complexity.
2Loss of energy
If a switching network is used in the first stage, then the power transformation efficiency is improved, but the voltage regulation precision may be insufficient
Solution Approach 1:
The converter is segmented into two stages with complementary functions. The first stage uses a switching network optimized for efficient power transformation with minimal energy loss. The second stage uses a regulating network optimized for precise voltage regulation. This functional segmentation allows each stage to excel at its specific task, achieving both high efficiency and high precision.
Solution Approach 2:
The first stage acts as an intermediary between the power source and the second stage. It performs theç²— transformation of power with high efficiency, and the second stage then refines this power to the precise levels required by digital circuits. This intermediary approach allows the system to achieve both efficiency and precision.
3Measurement precision
If a regulating network is used in the first stage, then the voltage regulation precision is improved, but the power transformation efficiency may be reduced
Solution Approach 1:
The converter is segmented into two stages where the first stage performs power transformation and the second stage performs precise regulation. By placing the switching network (efficient but less precise) in the first stage and the regulating network (precise but less efficient) in the second stage, the system optimizes overall performance by having each stage perform its strength.
4Manufacturing precision
If the power converter uses fixed configuration, then the manufacturing precision is improved, but the adaptability to different power requirements is reduced
Solution Approach 1:
The power converter incorporates reconfigurable elements that allow it to dynamically adapt its configuration based on the specific power requirements of the digital circuit. The switching networks and regulating networks can be reconfigured through control signals to provide different voltage transformation ratios and regulation levels, enabling the same physical device to meet multiple different power specifications.
Data Source
AI summary
An apparatus for providing electric power to a load includes a power converter that accepts electric power in a first form and provides electric power in a second form. The power converter comprises a control system, a first stage, and a second stage in series. The first stage accepts electric power in the first form. The control system controls operation of the first and second stage. The first stage is either a switching network or a regulating network. The second stage is a regulating circuit when the first stage is a switching network, and a switching network otherwise.