IEEE 802.3at PoE High-Power PD Interface with AUX Control - TPS2378

TPS2378 (ACTIVE)

IEEE 802.3at PoE High-Power PD Interface with AUX Control

 

Description

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.

Features

  • 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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Parametrics Compare all products in Powered Device

 
PD Power Level
Fault Response
PoE I/F
UVLO
PoE Current Limit (Min) (mA)
rDS(on) per FET (Typ) (mOhms)
Error Amplifier
PoE Inrush Limit (Typ) (mA)
PoE Standards Supported
Pin/Package
Approx. Price (US$)
TPS2378 TPS2379
25W     25W
>25W    
Auto Retry     Auto Retry    
YES   YES  
802.3at type 1/ type 2     802.3at type 1/ type 2    
850     850    
420     420    
No     No    
140     140    
802.3at Type 1 (802.3af)
802.3at Type 2    
802.3at Type 1 (802.3af)
802.3at Type 2
Non Standard    
8SO PowerPAD     8SO PowerPAD    
0.65 | 1ku     1.00 | 1ku