Fully autonomous IEEE 802.3af Power over Ethernet midspan PSE requires no microcontroller
Dilian Reyes
Abstract
Fully autonomous IEEE 802.3af Power over Ethernet midspan power sourcing equipment that requires no microcontroller is described.
Keywords
Power over Ethernet
power sourcing equipment
PSE
PSE controller
LTC4259A
Introduction
The IEEE802.3af Power over Ethernet (PoE) standard defines how power will be delivered over CAT5 lines. Despite the differences between legacy devices and those that adhere to the new standard, there is no need to completely replace existing systems. The nominal 48V required by powered devices (PDs) can be delivered by midspan power sourcing equipment (PSE), which is connected to the front ...
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