TPS23861 QUAD IEEE 802.3at Power-Over-Ethernet PSE Controller | TI.com

TPS23861 (ACTIVE)

QUAD IEEE 802.3at Power-Over-Ethernet PSE Controller

 

Special Note

In need of an IEEE802.3bt-ready PSE controller? Check out the TPS23880

Description

The TPS23861 is an easy-to-use, flexible, IEEE802.3at PSE solution. As shipped, it automatically manages four 802.3at ports without the need for any external control.

The TPS23861 automatically detects Powered Devices (PDs) that have a valid signature, determines power requirements according to classification and applies power. Two-event classification is supported for type-2 PDs. The TPS23861 supports DC disconnection and the external FET architecture allows designers to balance size, efficiency and solution cost requirements.

The unique pin-out enables 2-layer PCB designs via logical grouping and clear upper and lower differentiation of I2C and power pins. This delivers best-in-class thermal performance, Kelvin accuracy and low-build cost.

In addition to automatic operation, the TPS23861 supports Semi-Auto Mode via I2C control for precision monitoring and intelligent power management. Compliance with the 400-ms TPON specification is ensured whether in semi-automatic or automatic mode.

Features

  • IEEE 802.3at Quad Port PSE Controller
    • Auto Detect, Classification
    • Auto Turn-On and Disconnect
    • Efficient 255-mΩ Sense Resistor
  • Pin-Out Enables Two-Layer PCB
  • Kelvin Current Sensing
  • 4-Point Detection
  • Automatic Mode – As Shipped
    • No External Terminal Setting Required
    • No Initial I2C Communication Required
  • Semi-Automatic Mode – Set by I2C Command
  • Optional I2C Control and Monitoring
  • –40°C to 125°C Temperature Range
  • TSSOP 28 Package 9.8 mm x 6.6 mm

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Parametrics

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