TPS2388 IEEE 802.3at 8-port Power-over-Ethernet PSE | TI.com

TPS2388
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IEEE 802.3at 8-port Power-over-Ethernet PSE

 

Special note

In need of an IEEE802.3bt-ready PSE controller? Check out the TPS23881

Description

The TPS2388 is an 8-channel power source equipment (PSE) controller engineered to insert power onto Ethernet cable according to IEEE 802.3at-2012 standard (or 802.3at). The PSE controller can detect powered devices (PDs) that have a valid signature, determine the power requirements according to the classification, and apply power through either one (Type -1) or two-event (Type-2) physical classification. The TPS2388 also has the flexibility to support UPoE and other non-standard loads.

The Port remapping and the device pinout allow designers to enable 2-layer PCB designs and simplify software migration from previous generation PSE devices. The external FET architecture allows designers to further balance size, efficiency, thermal, and solution cost requirements. The current foldback reduces thermal stress on the external MOSFETs during startup and overload conditions allowing the use of cheaper FETs.

The Fast Shutdown (OSS) input provides up to eight levels of per port shutdown priority for applications that require the immediate disabling of multiple ports.

Features

  • Fully IEEE 802.3at Compliant
  • Port Re-Mapping
  • 1- and 3-Bit Fast Port Shutdown Input
  • “Never Fooled” 4-Point Detection
  • Type 1 and Type 2 PD Classification
  • Programmable Current Limit With Foldback
  • DC Disconnect Detection
  • Flexible Processor Controlled Operating Modes
    • Semiauto
    • Manual
  • 14-Bit Port Current and Voltage Monitoring
    • 100-ms Rolling Port Current Averaging
    • 2% Current Sensing Accuracy
    • 0.255-Ω Sense Resistor With Kelvin Sense
  • I2C Communication
    • I2C Watchdog for Failsafe Operation
    • 8- and 16-Bit Access Mode Selectable
  • –40°C to 125°C Temperature Operation
  • 56-Lead VQFN Package

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Parametrics

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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)
TPS2388 Order now 44     57     Programmable     802.3at Type 1 (802.3af)
802.3at Type 2    
External     DC Disconnect     2-Pair Alt A     -40 to 125     Current Limit with Foldback
Fast shutdown
Multi Level Port Priority
Over Current Reporting
Over Temp Reporting
Port remapping
Programmable ICUT    
8     QFN | 56     56QFN: 64 mm2: 8 x 8 (QFN | 56)    
TPS23861 Order now 44     57     Programmable     802.3at Type 1 (802.3af)
802.3at Type 2    
External     DC Disconnect     2-Pair Alt A     -40 to 125     Autonomous Mode
Current Limit with Foldback
Fast shutdown
Over Current Reporting
Over Temp Reporting
Programmable ICUT    
4     TSSOP | 28     28TSSOP: 62 mm2: 6.4 x 9.7 (TSSOP | 28)    
TPS23880 Order now 44     57     Programmable     802.3at Type 1 (802.3af)
802.3at Type 2
802.3bt Type 3
802.3bt Type 4    
External     DC Disconnect     2-Pair Alt A
4-Pair    
-40 to 125     Auto Mode
Current Limit with Foldback
Fast shutdown
Multi Level Port Priority
Over Current Reporting
Over Temp Reporting
Port remapping
Programmable PCUT
Programmable Port Power Limiting
SRAM Programmable    
8     QFN | 56     56QFN: 64 mm2: 8 x 8 (QFN | 56)    
TPS23881 Order now 44     57     Programmable     802.3at Type 1 (802.3af)
802.3at Type 2
802.3bt Type 3
802.3bt Type 4    
External     DC Disconnect     2-Pair Alt A
4-Pair    
-40 to 125     Auto Mode
Autonomous Mode
Current Limit with Foldback
Fast shutdown
Multi Level Port Priority
Over Current Reporting
Over Temp Reporting
Port remapping
Programmable PCUT
Programmable Port Power Limiting
SRAM Programmable    
8     QFN | 56     56QFN: 64 mm2: 8 x 8 (QFN | 56)