Adaptive Voltage Converter Synchronous Asynchronous Mode Switching
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Solution Overview
Problem
Synchronous-type voltage converters can suffer from reduced conversion efficiency and interference with radio-frequency signals when the input and output voltages are close, leading to phase noise issues.
Innovation Solution
A voltage converter that can adaptively switch between synchronous and asynchronous modes using a voltage detector, switch control circuit, first and second switches, and an energy storage circuit to adjust the output voltage based on the input voltage, ensuring better efficiency when voltages are not close and mitigating interference when they are close.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If synchronous mode is used, then conversion efficiency is improved, but phase noise increases when input and output voltages are close
Solution Approach 1:
The voltage converter dynamically switches between synchronous mode and asynchronous mode based on the voltage difference detection. When the voltage difference exceeds a threshold, synchronous mode is used for high efficiency; when it falls below the threshold, asynchronous mode is used to reduce phase noise. This dynamic adaptation resolves the contradiction by selecting the appropriate mode according to real-time operating conditions.
2Loss of energy
If synchronous mode is used, then conversion efficiency is improved, but interference with radio-frequency signals occurs when input and output voltages are close
Solution Approach 1:
The system dynamically adjusts its operating mode based on the voltage difference between input and output. When the voltage difference is small (below threshold), it switches to asynchronous mode to eliminate radio-frequency interference while maintaining acceptable efficiency. When the voltage difference is large, it operates in synchronous mode to maximize efficiency. This dynamic switching resolves the contradiction between efficiency and interference prevention.
3Object-affected harmful factors
If asynchronous mode is used, then phase noise is reduced, but conversion efficiency deteriorates
Solution Approach 1:
The system changes the operational parameters (switching mode) based on the voltage difference parameter. By monitoring the voltage difference and comparing it against a threshold, the system selects the optimal operating mode: asynchronous mode when voltage difference is small to reduce phase noise, and synchronous mode when voltage difference is large to maintain efficiency. This parameter-based decision-making resolves the efficiency-phase noise trade-off.
Data Source
AI summary
Disclosed is a voltage converter capable of adaptively operating in one of a synchronous mode and an asynchronous mode according to an input voltage of an input terminal. The voltage converter includes: a voltage detector generating a detection result according to the input voltage; a switch control circuit generating a first switch control signal and a second switch control signal according to the detection result and an output voltage of an output terminal; a first switch intermittently turned on according to the first switch control signal in the synchronous and asynchronous modes; a second switch intermittently turned on/off according to the second switch control signal in the synchronous/asynchronous mode; and an energy storage circuit electrically connected to the input and output terminals to store and release energy according to the on-off states of the first and second switches.