Adaptive Power Converter Frequency Modulation for Light-Load Efficiency
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Solution Overview
Problem
Adaptive power converters face challenges in efficiently managing power saving mechanisms under light-load or no-load conditions, as existing technologies do not effectively adjust power saving strategies to minimize power loss across varying output voltage levels.
Innovation Solution
A control circuit comprising a sample-hold circuit, input circuit, oscillation circuit, and PWM circuit that generates a switching signal with a frequency modulated by a clock signal, decreasing frequency in response to feedback signals indicating reduced output power, thereby adjusting the output voltage of the adaptive power converter to conserve power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the switching frequency is maintained at a high level to ensure fast response and stable regulation, then the output voltage regulation performance is improved, but the power consumption increases under light-load or no-load conditions
Solution Approach 1:
The patent implements dynamic frequency modulation of the switching signal based on load conditions. The control circuit automatically adjusts the switching frequency from a first frequency under full-load conditions to a second frequency under light-load or no-load conditions, making the system adaptable to varying power demands and minimizing unnecessary energy consumption while maintaining regulation performance when needed
Solution Approach 2:
The patent changes the switching frequency parameter dynamically based on load detection. By detecting the load condition and adjusting the switching frequency accordingly (from first frequency to second frequency), the system optimizes the balance between regulation performance and power consumption, reducing energy waste during light-load or no-load operation
2Use of energy by moving object
If the switching frequency is decreased to save power under light-load conditions, then the power consumption is reduced, but the response time and regulation capability may be degraded
Solution Approach 1:
The system dynamically adjusts switching frequency based on real-time load detection. Under light-load or no-load conditions, the frequency is reduced to save power, while under full-load conditions, the frequency increases to ensure fast response and stable regulation, thus achieving both power savings and maintaining response capability when needed
Solution Approach 2:
The control circuit detects load conditions and provides feedback to adjust the switching frequency accordingly. This feedback mechanism ensures that the switching frequency is optimized for both power efficiency during light-load conditions and response performance during full-load conditions, resolving the contradiction between power saving and response time
Data Source
AI summary
The present invention proposes a method for controlling an adaptive power converter. The method comprises: generating an output-sense signal by sampling a reflected voltage of a transformer; receiving a feedback signal related to an output power of the adaptive power converter; generating a clock signal in response to the feedback signal and the output-sense signal; generating a switching signal for switching the transformer and regulating an output voltage of the adaptive power converter. The reflected voltage is correlated to the output voltage of the adaptive power converter. The switching signal is generated in response to the feedback signal. The frequency of the switching signal is determined by the clock signal. The frequency of the switching signal is decreased in response to a decrement of the feedback signal.