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.