TPS23880 IEEE 802.3bt 8-Channel Power-over-Ethernet (PoE) PSE With Programmable SRAM | TI.com

TPS23880 (ACTIVE)

IEEE 802.3bt 8-Channel Power-over-Ethernet (PoE) PSE With Programmable SRAM

 

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For 2-pair, IEEE802.3at compliance, check out the  TPS2388

Description

The TPS23880 is an 8-channel  power sourcing equipment (PSE) controller engineered to insert power onto Ethernet cables in accordance with the IEEE 802.3bt (draft) standard.  The eight individual power channels can be configured in any combination of 2-Pair (1-channel) or 4-Pair (2-channels) PoE Ports. 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.

Programmable SRAM enables in field firmware upgradability over I2C to ensure IEEE compliance and interoperability with the latest PoE enabled devices.  Dedicated per port ADCs provide continuous port current monitoring and the ability to perform parallel classification measurements for faster port turn on times. The ±3% accurate programmable port power limit provides the ability to expand the maximum power sourced above 90 W without exceeding 100 W while also making system level power management control more easy to implement and reliable.  The Fast Shutdown (OSS) input provides up to eight levels of per port shutdown priority for applications requiring immediate disabling of multiple ports. The external FET architecture allows designs to balance size, efficiency, thermal, and solution cost requirements. 

Port remapping and pin-to-pin compatibility with the TPS2388 eases migration from previous generation PSE designs and enables interchangeable 2-layer PCB designs to accommodate different system PoE power configurations.

Features

  • IEEE 802.bt (Draft) PSE Solution for Type 3 or Type 4 PoE Applications
  • Eight Independent PSE Channels
  • SRAM Programmable Memory
  • Programmable Power Limiting Accuracy ±3%
  • Selectable 2-Pair or 4-Pair Port Power Allocations
    • 15.4 W, 30 W, 45 W, 60 W, 75 W, or 90 W
  • Single and Dual Signature PD Compatibility
  • Dedicated 14-Bit Current ADC Per Port
    • Inherent Filtering
    • 2% Current Sensing Accuracy
    • 100-ms Rolling Port Current Averaging
    • Noise Immune MPS for DC Disconnect
  • 1- and 3-Bit Fast Port Shutdown Input
  • Auto-Class Discovery and Power Measurement
  • Never Fooled 4-Point Detection
  • Inrush and Operational Foldback Protection
  • 425-mA and 1.25-A Selectable Current Limit
  • Port Re-Mapping
  • 8-Bit or 16-Bit I2C Communication
  • Flexible Processor Controlled Operating Modes
    • Auto, Semi Auto, and Manual / Diagnostic
  • Per Port Voltage Monitoring and Telemetry
  • –40°C to +125°C Temperature Operation

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Parametrics Compare all products in Power sourcing equipment

 
Vin (Min) (V)
Vin (Max) (V)
ICUT
ILIM
PoE standards supported
FET
MPS method
Pair control
Operating temperature range (C)
Number of PSE ports
Features
Package Group
Package size: mm2:W x L (PKG)
TPS23880 TPS23861 TPS2388
44     44     44    
57     57     57    
Programmable     Programmable     Programmable    
Programmable     Programmable     Programmable    
802.3at Type 1 (802.3af)
802.3at Type 2
802.3bt Type 3
802.3bt Type 4    
802.3at Type 1 (802.3af)
802.3at Type 2    
802.3at Type 1 (802.3af)
802.3at Type 2    
External     External     External    
DC Disconnect     DC Disconnect     DC Disconnect    
2-Pair Alt A
4-Pair    
2-Pair Alt A     2-Pair Alt A    
-40 to 125     -40 to 125     -40 to 125    
8     4     8    
Auto Mode
Current Limit with Foldback
Fast shutdown
Multi Level Port Priority
Over Current Reporting
Over Temp Reporting
Port remapping
Programmable Port Power Limiting
SRAM Programmable    
Autonomous Mode
Current Limit with Foldback
Fast shutdown
Over Current Reporting
Over Temp Reporting    
Current Limit with Foldback
Fast shutdown
Multi Level Port Priority
Over Current Reporting
Over Temp Reporting
Port remapping    
QFN | 56     TSSOP | 28     QFN | 56    
56QFN: 64 mm2: 8 x 8 (QFN | 56)     28TSSOP: 62 mm2: 6.4 x 9.7 (TSSOP | 28)     56QFN: 64 mm2: 8 x 8 (QFN | 56)