Load Detection Circuit for Low-Standby Power Supply
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Solution Overview
Problem
Conventional power supply systems consume excessive power when detecting whether a powered device is connected, which contradicts the goal of reducing energy consumption.
Innovation Solution
A power supply system with a detection device that includes a controller, switch set, and connecting port, which selectively provides power to the power supply equipment only when a powered device is connected, using transistors to manage power flow and reduce unnecessary consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power supply equipment operates periodically to detect whether a powered device is connected, then the detection function is maintained, but the power consumption increases
Solution Approach 1:
The patent extracts the detection function from the main power supply equipment into a separate detecting device. This detecting device includes a controller that can detect whether a powered device is connected without requiring the main power supply equipment to operate continuously. The detection is performed through a detecting interface that monitors the connection status independently, allowing the main equipment to remain in a low-power state while detection functionality is preserved.
2Reliability
If the power supply equipment keeps operating without load, then the detection capability is maintained, but energy is wasted
Solution Approach 1:
The patent implements dynamic operation modes for the power supply equipment. When no powered device is connected, the equipment enters a standby mode with minimal power consumption. When a device is detected, it transitions to an active mode to provide power. This dynamic switching between operational states eliminates continuous operation without load, thereby preventing energy waste while maintaining detection capability through the separate detecting device.
Solution Approach 2:
The patent introduces a detecting device as an intermediary between the power supply equipment and the powered device. This intermediary performs the detection function, allowing the main power supply equipment to remain inactive or in low-power mode. The detecting device communicates connection status to the power supply equipment, enabling it to activate only when necessary, thus eliminating energy waste from continuous operation.
3Use of energy by moving object
If the power supply equipment reduces operation to save power, then energy consumption decreases, but the ability to detect connected devices may be compromised
Solution Approach 1:
The patent segments the power supply system into two independent functional parts: a detecting device responsible for detection and a power supply equipment responsible for power delivery. The detecting device includes its own controller and detecting interface that can operate with minimal power consumption while continuously monitoring for connected devices. This segmentation allows the detection function to be maintained independently of the power supply state, ensuring detection ability is not compromised even when power consumption is reduced.
Data Source
AI summary
The present disclosure features a system, method and non-transitory computer readable storage medium thereof for power supply. The method for power supply comprises receiving a first power of a general power supply by a detecting device including a switch set, a connecting port and a controller, and the controller enabling the switch set to operate, to supply a second power of the general power supply to a powered device (PD) through a power supply device (PSE).