TPS2378 Texas instruments

TPS2378

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TPS2378

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Описание

This 8-pin integrated circuit contains all of the features needed to implement an IEEE802.3at type-2 powered device (PD). The low 0.5-Ω internal switch resistance, combined with the enhanced thermal dissipation of the PowerPAD™ package, enables this controller to continuously handle up to 0.85 A. The TPS2378 features an auxiliary power detect (APD) input, providing priority for an external power adapter. It also features a 100-V pass transistor, 140-mA inrush current limiting, type-2 indication, auto-retry fault protection, and an open-drain power-good output.

IEEE 802.3at Type-2 Hardware Classification with Status Flag
Adapter Priority Input
DC/DC Converter Enable
Robust 100 V, 0.5-Ω Hotswap MOSFET
Operating Current up to 850 mA
1-A (Typical) Operating Current Limit
15 kV and 8 kV System-level ESD Capability
PowerPAD HSOP Package

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Vin (min) (V)	0
Vin (max) (V)	57
PoE current limit (min) (mA)	850
PoE inrush limit (mA) (typ)	140
rDS(on) per FET (typ) (mΩ)	420
PoE standards supported	802.3at Type 1 (802.3af), 802.3at Type 2
PD power level	13W, 25W
DC/DC control	PD Only
Fault response	Auto Retry
Features	PG, Primary Side Adapter Priority, Thermal shutdown
Operating temperature range (°C)	-40 to 85
Rating	Catalog