IEEE 802.3bt PoE High-Power PD Interface with Automatic MPS & Autoclass - TPS2372

TPS2372 (ACTIVE)

IEEE 802.3bt PoE High-Power PD Interface with Automatic MPS & Autoclass

 

Description

The TPS2372 contains all of the features needed to implement an IEEE802.3at or IEEE802.3bt (draft) (Type 1-4) powered device (PD). The low internal switch resistance allows the TPS2372-4 and TPS2372-3 to support high power applications up to 90 W and 60 W respectively. Assuming 100-meter CAT5 cable, this translates into 71.3 W and 51 W at PD input.

The TPS2372 operates with enhanced features.

The Automatic MPS function enables applications requiring very low power standby modes. The TPS2372 automatically generates the necessary pulsed current to maintain the PSE power. An external resistor is used to enable this functionality and to program the MPS pulsed current amplitude.

The TPS2372 also implements a delay function to allow the remote PSE to complete its inrush phase before releasing the Power Good (PG) output. This ensures that the IEEE802.3bt (draft) startup requirements are met.

The Autoclass enable input also allows advanced system power optimization modes compliant with IEEE802.3bt (draft) standard.

Features

  • IEEE 802.3bt (Draft) PD Solution for Type 3 or Type 4 PoE
  • Supports Power Levels for Type-4 ( TPS2372-4) 90-W and Type-3 ( TPS2372-3) 60-W Operation
  • Robust 100 V Hotswap MOSFET
    • TPS2372-4 (typ.): 0.1-Ω, 2.2-A Current Limit
    • TPS2372-3 (typ.): 0.3-Ω, 1.8-A Current Limit
  • Allocated Power Indicator Outputs
  • PG Output with Inrush Completion Delay
    • Compliant to PSE Inrush
  • Automatic Maintain Power Signature (MPS)
    • Auto-adjust MPS for Type 1-2 or 3-4 PSE
    • Supports Ultra-Low Power Standby Modes
  • Supports Autoclass Operation
  • Supports PoE++ PSE
  • -40°C to 125°C Junction Temperature Range
  • 20-lead VQFN Package

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Parametrics Compare all products in Powered Device

 
Vin (Min) (V)
Vin (Max) (V)
PoE Current Limit (Min) (mA)
PoE Inrush Limit (Typ) (mA)
rDS(on) per FET (Typ) (mOhms)
PoE Standards Supported
PD Power Level
DC/DC Control
Features
Package Group
Package Size: mm2:W x L (PKG)
Pin/Package
TPS2372 TPS2373
8    8   
57    57   
1900    1900   
335mA Typ    335mA Typ   
100    100   
802.3bt Type 4    802.3bt Type 4   
71W    71W   
  PD Only   
Auto-adjust MPS
Autoclass
Inrush delay
Non-standard POE++ compatible
Thermal Shutdown   
Adapter priority
Advanced startup
Auto-adjust MPS
Non-standard POE++ compatible
PG
Thermal Shutdown   
VQFN    VQFN   
20VQFN: 25 mm2: 5 x 5(VQFN)    20VQFN: 25 mm2: 5 x 5(VQFN)   
20VQFN    20VQFN