Voltage Converter Light-Load Control Switching
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Solution Overview
Problem
Voltage converters experience unnecessary power consumption when operating in light-load states due to current flow in control elements, which can disturb radio frequency signals and increase noise in output voltages, especially when the load is zero or minimal.
Innovation Solution
A light-load control device and method that determines the load state of a voltage converter and generates a discontinuous conduction signal to disable the converter when in a light-load state, replacing the specific driving signal with a light-load driving signal to reduce power consumption and optimize performance by using the appropriate driving signal based on the load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the voltage converter operates continuously to maintain low-noise mode, then the noise in output voltage is reduced, but power consumption increases due to current flow in control elements during light-load states
Solution Approach 1:
The patent implements dynamic operation mode switching that adapts the voltage converter's working state based on real-time load conditions. The control device dynamically transitions between continuous conduction mode (for heavy loads requiring low noise) and discontinuous conduction mode (for light loads where power savings are prioritized), making the system's operational characteristics variable rather than fixed to resolve the contradiction between noise reduction and power consumption.
Solution Approach 2:
The patent employs periodic sampling of load current to determine whether to activate low-noise mode or power-saving mode. By periodically monitoring the load current and switching operation modes based on threshold comparisons, the system achieves periodic action that optimizes the balance between noise performance and power consumption according to actual load conditions.
2Object-affected harmful factors
If the voltage converter uses a specific driving signal to reduce noise, then the radio frequency signal disturbance is minimized, but unnecessary power consumption occurs when the load is light or zero
Solution Approach 1:
The control device periodically monitors the load current and switches between driving signal types based on the monitored conditions. When light-load conditions are detected, the system transitions from using a specific driving signal optimized for low noise to using a basic driving signal that consumes less power, and switches back when load conditions change, implementing periodic evaluation and adjustment.
Solution Approach 2:
The patent changes the driving signal parameters (from specific driving signal to basic driving signal) based on load conditions. By modifying the driving signal characteristics dynamically according to whether the load is heavy or light, the system optimizes both noise performance and power consumption by selecting appropriate signal parameters for each operating condition.
3Stability of the object's composition
If the voltage converter operates in low-noise mode with continuous conduction, then the output voltage stability is improved, but the static current increases causing power waste during light-load conditions
Solution Approach 1:
The patent implements dynamic switching between continuous conduction mode and discontinuous conduction mode based on load conditions. The control device dynamically adjusts the conduction characteristics of the voltage converter, making the static current draw variable rather than constant, thereby reducing power waste during light-load conditions while maintaining adequate output voltage stability when needed.
Data Source
AI summary
Voltage converter having light-load control. In some embodiments, a voltage converter can be configured to receive an input voltage and generate a regulated voltage. Such a voltage converter can include a determining unit configured to determine whether the voltage converter is in a first load state. The voltage converter can further include a driving unit in communication with the determining unit, and be configured to generate a first driving signal when the voltage converter is in the first load state. The voltage converter can further include a switching unit in communication with the driving unit, and be configured to route the first driving signal to a control element of the voltage converter when the voltage converter is in the first load state, and be further configured to route a second driving signal to the control element when the voltage converter is in a second load state.