SLVSB98A March 2012 – July 2015 TPS2379
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Parameter Measurement Information
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3 Feature Description
- 8.4
Device Functional Modes
- 8.4.1
PoE Overview
- 8.4.1.1 Threshold Voltages
- 8.4.1.2 PoE Start-Up Sequence
- 8.4.1.3 Detection
- 8.4.1.4 Hardware Classification
- 8.4.1.5 Inrush and Start-up
- 8.4.1.6 Maintain Power Signature
- 8.4.1.7 Start-up and Operation
- 8.4.1.8 PD Hotswap Operation
- 8.4.1.9 CDB and T2P
- 8.4.1.10 Auxiliary Pass MOSFET Control
- 8.4.1.11 Using DEN to Disable PoE
- 8.4.1
PoE Overview
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
- DDA|8
Thermal pad, mechanical data (Package|Pins)
- DDA|8
Orderable Information
1 Features
- 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 (Typical) Operating Current Limit
- 140 mA (Typical) Inrush Current Limit
- DC-DC Converter Enable
- 15 kV/8 kV System-level ESD Capability
- PowerPAD™ HSOP Package
2 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
3 Description
The TPS2379 device is an 8-pin integrated circuit that contains all of the features needed to implement an IEEE802.3at type-2 powered device (PD) such as Detection, Classification, Type 2 Hardware Classification, and 140-mA inrush current limit during startup. 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 integrates a low 0.5-Ω internal switch to allow for up to 0.85 A of continuous current through the PD during normal operation. The TPS2379 device supports higher-power applications through an external pass transistor. The TPS2379 contains several protection features such as thermal shutdown, current limit foldback, and a robust 100-V internal switch.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| TPS2379 | HSOP (8) | 4.89 mm × 3.90 mm |
- For all available packages, see the orderable addendum at the end of the data sheet.
Typical Application Circuit
