Power Over Ethernet ICs

Power over Ethernet (PoE) is a widely adopted technology used to transfer both data and electrical power over an RJ-45 cable. ST offers solutions for PoE applications, on the powered devices (PD) side, compliant with both the more recent IEEE 802.3at specification, commonly known as PoE+, and the former IEEE 802.3af (PoE).

The design of power supply sections for all powered devices can be greatly simplified with the PM880x family, integrating a PoE interface and a current-mode PWM controller. The PoE interface incorporates all the functions required by the communication standard, including detection, classification, undervoltage lockout (UVLO) and in-rush current limitation.

PM8805
IEEE802.3bt PoE-PD interface with integrated dual-active-bridge
PM8804
PWM peak current mode controller for PoE and telecom systems
PM8801
PoE-PD interface & PWM controller
PM8803
High efficiency integrated IEEE 802.3at PoE-PD interface and PWM controller type 2 PSE indicator, plus support for forward active clamp topology
PM8800
Integrated IEEE 802.3af compliant PoE-PD interface and PWM controller with support of external source

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