Switched Capacitor Voltage Converter With Timing Control
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Solution Overview
Problem
Conventional switched capacitor voltage converting devices require a large number of capacitors and switches, leading to high costs and significant circuit area, especially when generating multiple output voltages, due to the need for stabilization and voltage drift prevention.
Innovation Solution
A voltage converting device comprising three voltage converters, each with charge switches and output switches, operates in specific states to output multiple voltages without the need for a stabilization capacitor, using a well-arranged timing control scheme to ensure continuous output without voltage drift, reducing the number of capacitors required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional switched capacitor voltage converting devices use stabilization capacitors to prevent voltage drift, then output voltage stability is improved, but circuit area and cost increase significantly
Solution Approach 1:
The patent extracts and eliminates the stabilization capacitor from the conventional switched capacitor voltage converting device. By redesigning the switching control method and converter architecture, the invention achieves voltage stability without requiring the separate stabilization capacitor component, thereby reducing circuit area while maintaining reliability
Solution Approach 2:
The patent makes the main capacitors in the switched capacitor voltage converters serve dual functions: both voltage conversion and stabilization. The capacitors that were previously dedicated solely to voltage conversion now also provide stabilization functionality through coordinated switching control, eliminating the need for separate stabilization components
2Reliability
If conventional switched capacitor voltage converting devices use multiple capacitors for each voltage converter, then voltage conversion reliability is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges the stabilization function with the voltage conversion function by using the same capacitors for both purposes. Instead of having separate stabilization capacitors and conversion capacitors, the invention combines these functions into a unified architecture where the conversion capacitors perform both roles through coordinated switching control
Solution Approach 2:
The patent removes the dedicated stabilization capacitors from the system, extracting this function and integrating it into the existing voltage conversion capacitors through intelligent switching control, thereby reducing component count and manufacturing cost
3Adaptability or versatility
If conventional switched capacitor voltage converting devices use 2N switched capacitor voltage converters for N output voltages, then output voltage variety is improved, but device complexity increases
Solution Approach 1:
The patent designs each switched capacitor voltage converter to perform multiple functions: voltage conversion to different output levels and voltage stabilization. By making each converter unit multi-functional, the system can provide N different output voltages using fewer than 2N converters, reducing overall device complexity while maintaining versatility
Solution Approach 2:
The patent employs dynamic switching control where the same converter circuit can be dynamically reconfigured to provide different output voltages at different time periods. This dynamic operation allows a single converter to serve multiple voltage output roles, reducing the total number of converters needed while maintaining adaptability
Data Source
AI summary
A voltage converting device includes first to third voltage converters, each including a capacitor, a pair of charge switches for charging the capacitor, a pair of first output switches for outputting a first output voltage through the capacitor, and a pair of second output switches for outputting a second output voltage through the capacitor. Via timing control of the switches, outputs of the first and second output voltages are substantially continuous and are prevented from floating.