1 Features

1• 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, 1.85-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

2 Applications

• IEEE 802.3bt (Draft) Compliant Devices

• Lighting

• Power Modules

• Dual Signature PD/Forced UPOE

• 4PPOE

• Pass-through System

• Security Cameras

• Multiband access points

• Pico-base Stations

3 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.