POE interface protection Series (2) - PSE protection
1. Abstract
POE, the short for Power Over Ethernet, according to the composition of the system, mainly divided into PD and PSE two parts, of which, PD is the power device, the load side, common such as IPC, AP, etc.;PSE is power supply equipment, such as POE switches.The same series of the above explained the PD protection, today to share the PSE protection.
2.PSE interface protection
POE interface equal to Ethernet port + power supply interface, and PSE interface is decomposed into Ethernet port + power supply interface. In ITU standard, the test requirements is the same as PD interface test requirements. As follows:
According to the test requirements, for the external Ethernet port, the maximum energy is the common mode 6kV 7Ω test requirements, the current is about 850A, the energy is relatively large, need to be shared by multiple components; According to the requirements of the standard, the insulation impedance of DC500V greater than 2MΩ must be met after the test.In summary, we recommend the following solutions for PSE interface:
▼PSE side multi-way in one
▼PSE Ethernet
3.Summary
■The diversion diode needs to meet more than 850/2A of 8/20μs current impact in the test stress. Through the actual test, the 1A above Schottky can meet the test stress, and the withstand voltage is recommended to be greater than 100V.
