TPS2379 Datasheet, PDF (1/30 Pages) Texas Instruments – IEEE 802.3at PoE High-Power PD Interface with External Gate Driver

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TPS2379
SLVSB98 – MARCH 2012
IEEE 802.3at PoE High-Power PD Interface with External Gate Driver
Check for Samples: TPS2379
FEATURES
1
•2 IEEE 802.3at Type-2 Hardware Classification
with Status Flag
• Auxiliary Gate Driver for High-power
Expansion
• Robust 100 V, 0.5 Ω Hotswap MOSFET
• 1A (typ.) Operating Current Limit
• 140 mA (typ.) Inrush Current Limit
• DC/DC Converter Enable
• 15 kV/8 kV System-level ESD Capability
• PowerPad™ SO-8 Package
APPLICATIONS
• IEEE 802.3at-compliant Devices
• Universal Power Over Ethernet (UPOE)
Compliant Devices
• Video and VoIP Telephones
• Multiband Access Points
• Security Cameras
• Pico-Base Stations
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 TPS2379 supports
higher-power applications through the use of an external pass transistor. It also features a 100 V internal pass
transistor, 140 mA inrush current, type-2 indication, auto-retry fault protection, and an open-drain power-good
output.
SO-8 PowerPad
V_DD
1
DEN
2
CLS
3
V_SS
4
8
GATE
7
T2P
6
CDB
5
RTN
D₁ ^RDEN
C₁
R_CLS
TPS 2379
V_DD
DEN
CLS
T2P
CDB
R_T2P
GATE
V_SS
RTN
R_BLST
Q1
V_C
SS
C_BULK
Figure 1. Typical Application
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPad, PowerPAD are trademarks of Texas Instruments.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated