Switched-Capacitor Voltage Converter for Even Current Distribution
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Solution Overview
Problem
Current voltage converters, such as Dickson converters, experience severe heat generation due to uneven current distribution, leading to high conduction losses and increased transistor stress.
Innovation Solution
A voltage conversion circuit with a specific topology that evenly distributes currents by connecting switch units and capacitor units in a particular configuration, reducing conduction losses and lowering the withstand voltage requirements for capacitors, thereby improving space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a Dickson converter is used to achieve a voltage gain of 4:1, then high conversion efficiency is obtained, but severe heat generation occurs due to uneven current distribution
Solution Approach 1:
The patent divides the single high-current path of the Dickson converter into multiple parallel current paths by introducing additional switch units and capacitor units. This segmentation distributes the total output current across multiple transistors, reducing the current burden on each individual transistor and thereby reducing heat generation while maintaining the overall conversion efficiency.
2Loss of energy
If a Dickson converter is used to achieve a voltage gain of 4:1, then high conversion efficiency is obtained, but transistor stress increases due to uneven current distribution
Solution Approach 1:
The patent segments the current distribution by adding parallel switch units and capacitor units, so that multiple transistors share the current load instead of a single transistor bearing the full burden. This reduces the stress on each transistor and improves the overall reliability of the converter.
3Power
If capacitor units with high withstand voltage are used to handle the voltage gain of 4:1, then voltage conversion is achieved, but device volume increases
Solution Approach 1:
The patent segments the voltage handling by distributing the voltage gain across multiple capacitor units in parallel paths. Each capacitor unit only needs to withstand a fraction of the total voltage, allowing the use of smaller, lower-voltage-rated capacitors that collectively provide the required voltage gain while reducing overall device volume.
Data Source
AI summary
This application provides a voltage conversion circuit, which includes: a first switch unit, connected in series between an input end and a first node; a second switch unit, connected in series between the first node and a second node; a first capacitor unit, connected in series between the first node and a third node; a second capacitor unit, connected in series between the second node and a fourth node; a third switch unit, connected in series between the third node and a fifth node; a fourth switch unit, connected in series between the third node and a ground end; a fifth switch unit, connected in series between the fifth node and an output end; a third capacitor unit, connected in series between the fifth node and a sixth node; a sixth switch unit, connected in series between the sixth node and the output end; a seventh to tenth switch units.