Power Supply Skip Mode Efficiency Control
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Solution Overview
Problem
Existing power supply devices face inefficiencies in light load states, where skip mode control can lead to negative impacts such as noise amplification and ripple issues, failing to balance the efficiency required by the load with the device's efficiency, thereby not satisfying power characteristic requirements.
Innovation Solution
A power supply device and method that includes an input power source detection circuit, converter, feedback unit, conversion control circuit, and mode control circuit to detect input and output power, generate feedback signals, and control the converter's operation in skip mode based on efficiency differences, ensuring the output current value within a predetermined range does not exceed a certain threshold, thereby balancing load and device efficiencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If skip mode control is used to improve power supply device efficiency in light load state, then device efficiency is improved, but load power characteristic requirements cannot be satisfied (ripples amplified, noises generated)
Solution Approach 1:
The patent implements a feedback mechanism where the control circuit monitors the operating state of the converter and dynamically adjusts between skip mode and continuous conduction mode based on load conditions. This feedback control ensures that the power supply device operates in skip mode only when appropriate, preventing ripple amplification while maintaining high efficiency during light loads.
Solution Approach 2:
The patent employs dynamic mode switching capability where the converter can transition between different operating modes (skip mode and continuous conduction mode) based on real-time load conditions. This dynamic adjustment allows the system to optimize between efficiency and power quality requirements across different operating states.
2Loss of energy
If converter operates in skip mode to achieve high efficiency, then device efficiency is improved, but load efficiency requirement cannot be met
Solution Approach 1:
The control circuit dynamically switches between skip mode and continuous conduction mode based on load conditions, allowing the system to adapt to varying efficiency requirements of the load while maintaining optimal device efficiency.
Solution Approach 2:
The patent changes the operating parameters of the converter by switching between different conduction modes. This parameter change allows the system to meet both device efficiency requirements and load efficiency requirements under different operating conditions.
3Loss of energy
If skip mode control is implemented to reduce energy loss, then device efficiency is improved, but power characteristic requirements of load are not satisfied
Solution Approach 1:
The control circuit uses feedback from the operating state monitoring to determine when to switch between skip mode and continuous conduction mode, ensuring that power characteristic precision is maintained while minimizing energy loss.
Solution Approach 2:
The system dynamically adjusts its operating mode based on real-time conditions, transitioning between skip mode for efficiency and continuous conduction mode for power characteristic precision, thereby resolving the contradiction between energy loss reduction and precision maintenance.
Data Source
AI summary
A power supply device and a power supply method are provided. The power supply device is configured to generate a first feedback signal according to an output power source, and operate in a skip mode (or called burst mode) according to the first feedback signal. The power supply device is configured to obtain an overall efficiency according to an input power and an output power, and obtain a difference between the overall efficiency and a preset efficiency. When an output current value of the output power source is within a predetermined range and the difference is greater than a first value, the power supply device generates a second feedback signal and stops operating in the skip mode according to the second feedback signal.