The 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. The 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 configurations.
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|Part number||Order||Vin (Min) (V)||Vin (Max) (V)||ILIM||PoE standards supported||FET||MPS method||Pair control||Operating temperature range (C)||Features||Number of PSE ports||Package Group||Package size: mm2:W x L (PKG)|
802.3at Type 1 (802.3af)
802.3at Type 2
802.3bt Type 3
|External||DC Disconnect||2-Pair Alt A||-40 to 125||
Current Limit with Foldback
Multi Level Port Priority
Over Current Reporting
Over Temp Reporting
Programmable Port Power Limiting
|8||QFN | 56||56QFN: 64 mm2: 8 x 8 (QFN | 56)|