TPS23882 is an 8-channel power sourcing equipment (PSE) controller
engineered to insert power onto Ethernet cables in accordance with the IEEE 802.3bt standard.
The PSE controller can
detect powered devices (PDs) that have a valid signature, determine the power requirements of the
devices according to their classification, and apply power.
The TPS23882 improves on the TPS2388 with reduced current sense
resistors, selectable Autonomous operation, SRAM programmability, programmable power limiting,
capacitance measurement, and compatibility with TIs
FirmPSE system firmware (see Device Comparison Table).
Dedicated per port ADCs
provide continuous port current monitoring and the ability to perform parallel classification
measurements for faster port turn on times. A 1.25-A port current limit and adjustable power limiting
allows for the support of non-standard applications above 60-W sourced.
200-mΩ current sense
resistor and external FET architecture allow designs to balance size, efficiency, thermal and
solution cost requirements.
Port remapping and pin-to-pin compatibility with the TPS2388,
TPS23880, and TPS23881 devices eases migration from previous generation PSE designs and enables
interchangeable 2-layer PCB designs to accommodate different system PoE power