以太网供电设备及其供电方法
By adjusting the mirror ratio in the Power over Ethernet system through mirroring circuits and sampling conversion circuits, the problem of inaccurate current sampling in the standby state of PD devices is solved, enabling accurate detection of small currents and ensuring stable system operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI CHAOFENG TECH CO LTD
- Filing Date
- 2022-04-13
- Publication Date
- 2026-07-17
AI Technical Summary
Existing Power over Ethernet (PoE) systems suffer from inaccurate sampling when detecting small currents in the standby state of PD devices. This leads to misjudgments by the PSE device in real-time monitoring of the load current of the PD device, affecting the normal operation of the entire PoE system.
The power supply port current is mirrored and converted into a sampling voltage using a mirror circuit and a sampling conversion circuit. The mirror ratio is adjusted by a mode control circuit and an MPS control circuit to achieve accurate sampling of different current states.
In MPS mode, the mirror ratio of the mirror circuit is reduced, which enables accurate sampling of small currents and avoids misjudgment of the working status caused by inaccurate sampling values, thus ensuring the stable operation of the Ethernet power supply system.
Smart Images
Figure CN116962095B_ABST