Active PoE Control Circuit for Low Power Consumption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Active Power over Ethernet (PoE) technologies fail to meet Level VI Energy Efficiency Requirements under no-load conditions due to high energy consumption by internal circuit components.
Innovation Solution
An active PoE control apparatus with a low-power-consumption control circuit, comprising a detecting circuit, handshaking circuit, and self-holding circuit, which disconnects power supply when no device is connected and efficiently manages power delivery through n-MOSFETs and diodes to maintain low energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If active PoE detection circuit is continuously operated to detect power supply needs, then power supply detection accuracy is improved, but power consumption increases and fails to meet Level VI Energy Efficiency Requirements
Solution Approach 1:
The patent implements periodic detection cycles where the detection circuit operates intermittently rather than continuously. The control circuit switches between active detection mode and low-power standby mode, performing power supply detection at specific intervals. This periodic operation maintains detection accuracy when needed while significantly reducing average power consumption to meet Level VI Energy Efficiency Requirements.
Solution Approach 2:
The patent dynamically adjusts the operating state of the detection circuit based on system conditions. The control circuit transitions the detection circuit between different operational states (active detection, standby, and powered-off) depending on whether a device is connected and whether detection is currently required. This dynamic state management resolves the contradiction by optimizing both detection accuracy and power consumption in real-time.
2Speed
If detection circuit and control components remain active to enable immediate power supply, then response speed is improved, but power consumption increases
Solution Approach 1:
The patent implements preliminary detection during device connection establishment. When a device is first connected, the detection circuit performs initial power supply detection and establishes the power delivery state in advance. This preliminary action ensures that once detection is complete, the system can enter low-power mode while still maintaining the ability to respond to power supply needs, thus reducing ongoing power consumption without sacrificing response capability.
Solution Approach 2:
The control circuit automatically manages the transition between active and low-power states based on detection results. Once power supply detection is completed and the powered device is confirmed to be receiving power, the system self-transitions to a lower power consumption state, eliminating the need for continuous active monitoring while maintaining system responsiveness.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces no-load mode power consumption to less than or equal to 100 milliwatts, meeting the Level VI Energy Efficiency Requirements by minimizing energy usage during idle states.
Implementation Method 1
The voltage-divided resistor network is configured to provide a voltage at which the first power switch is turned on
Implementation Method 2
a duration time of the second control signal with the high level is determined by the resistor-capacitor network
Implementation Method 3
efficiently manages power delivery through n-MOSFETs and diodes to maintain low energy usage
Implementation Method 4
efficiently manages power delivery through n-MOSFETs and diodes to maintain low energy usage
Data Source
AI summary
An active power over Ethernet control apparatus with low power consumption includes a control unit and a low-power-consumption control circuit. The control unit is installed inside a power sourcing equipment. The low-power-consumption control circuit includes a detecting circuit, a handshaking circuit, and a self-holding circuit. The detecting circuit provides a first control signal. The handshaking circuit receives the first control signal and provides a second control signal. The self-holding circuit receives the second control signal. When a powered device is not connected to the power sourcing equipment, a power-supplying path from the power sourcing equipment to the powered device is disconnected. When the powered device is connected to the power sourcing equipment, the handshaking circuit is controlled by the first control signal and the self-holding circuit is controlled by the second control signal to make the power-supplying path be connected.