Feature
- 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 HotswapMOSFET
- TPS2372-4 (typ.): 0.1-Ω, 2.2-A CurrentLimit
- 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 StandbyModes
- Supports Autoclass Operation
- Supports PoE++PSE
- -40°C to 125°C Junction Temperature Range
- 20-lead VQFN Package
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DescriptionThe TPS2372 contains all of the features needed to implement anIEEE802.3at or IEEE802.3bt (draft) (Type 1-4) powered device (PD). The low internal switchresistance allows the TPS2372-4 and TPS2372-3 to supporthigh power applications up to 90 W and 60 W respectively. Assuming 100-meter CAT5 cable, thistranslates 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 maintainthe PSE power. An external resistor is used to enable this functionality and to program the MPSpulsed current amplitude.
The TPS2372 also implements a delay function toallow the remote PSE to complete its inrush phase before releasing the Power Good (PG) output. Thisensures that the IEEE802.3bt (draft) startup requirements are met.
The Autoclass enable input also allows advanced system poweroptimization modes compliant with IEEE802.3bt (draft) standard.
