TPS2372 Texas instruments

TPS2372

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TPS2372

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Описание

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.

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

Vin (min) (V)	8
Vin (max) (V)	57
PoE current limit (min) (mA)	1550, 1900
PoE inrush limit (mA) (typ)	200, 335
rDS(on) per FET (typ) (mΩ)	100, 300
PoE standards supported	802.3bt Type 3, 802.3bt Type 4
PD power level	13W, 25W, 51W, 71W
DC/DC control	PD Only
Fault response	Auto Retry
Features	Autoclass, Automatic MPS, Inrush delay, Non-standard POE++ compatible, PG, Thermal shutdown
Operating temperature range (°C)	-40 to 125
Rating	Catalog