TPS2388 Controller Datasheet

TPS2388 Datasheet, PDF, Equivalent


Part Number

TPS2388

Description

IEEE 802.3at 8-Channel Power-over-Ethernet PSE Controller

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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TPS2388
SLUSC25A – FEBRUARY 2015 – REVISED AUGUST 2017
TPS2388 IEEE 802.3at 8-Channel Power-over-Ethernet PSE Controller
1 Features
1 Fully IEEE 802.3at Compliant
• Port Re-Mapping
• 1- and 3-Bit Fast Port Shutdown Input
• “Never Fooled” 4-Point Detection
• Type 1 and Type 2 PD Classification
• Programmable Current Limit With Foldback
• DC Disconnect Detection
• Flexible Processor Controlled Operating Modes
– Semiauto
– Manual
• 14-Bit Port Current and Voltage Monitoring
– 100-ms Rolling Port Current Averaging
– 2% Current Sensing Accuracy
– 0.255-Ω Sense Resistor With Kelvin Sense
• I2C Communication
– I2C Watchdog for Failsafe Operation
– 8- and 16-Bit Access Mode Selectable
• –40°C to 125°C Temperature Operation
• 56-Lead VQFN Package
2 Applications
• Enterprise Switches and Routers
• SoHo Switches and Routers
• PoE Pass-Through Power Modules
• Network Video Recorders (NVRs)
3 Description
The TPS2388 is an 8-channel power source
equipment (PSE) controller engineered to insert
power onto Ethernet cable according to IEEE
802.3at-2012 standard (or 802.3at). The PSE
controller can detect powered devices (PDs) that
have a valid signature, determine the power
requirements according to the classification, and
apply power through either one (Type -1) or two-
event (Type-2) physical classification. The TPS2388
also has the flexibility to support UPoE and other
non-standard loads.
The Port remapping and the device pinout allow
designers to enable 2-layer PCB designs and simplify
software migration from previous generation PSE
devices. The external FET architecture allows
designers to further balance size, efficiency, thermal,
and solution cost requirements. The current foldback
reduces thermal stress on the external MOSFETs
during startup and overload conditions allowing the
use of cheaper FETs.
The Fast Shutdown (OSS) input provides up to eight
levels of per port shutdown priority for applications
that require the immediate disabling of multiple ports.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS2388
VQFN (56)
8.00 mm × 8.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
+3.3 V
+48 V
VDD
SCL
SDAO
SDAI
TPS2388
VPWR
DRAINn
GATn
SENn
INT
KSENSx
AGND DGND
100 nF
100 V
PORT
255 mO
Note: Only port n shown
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

TPS2388
TPS2388
SLUSC25A – FEBRUARY 2015 – REVISED AUGUST 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
5.1 Detailed Pin Description............................................ 4
6 Specifications......................................................... 6
6.1 Absolute Maximum Ratings ...................................... 6
6.2 ESD Ratings ............................................................ 6
6.3 Recommended Operating Conditions....................... 6
6.4 Thermal Information .................................................. 7
6.5 Electrical Characteristics........................................... 7
6.6 Timing Requirements ............................................. 10
6.7 Switching Characteristics ........................................ 11
6.8 Typical Characteristics ............................................ 12
7 Parameter Measurement Information ................ 14
7.1 Timing Diagrams ..................................................... 14
8 Detailed Description ............................................ 16
8.1 Overview ................................................................. 16
8.2 Functional Block Diagram ....................................... 17
8.3 Feature Description................................................. 18
8.4 Device Functional Modes........................................ 20
8.5 Programming .......................................................... 21
8.6 Register Maps ......................................................... 24
9 Application and Implementation ........................ 64
9.1 Application Information............................................ 64
9.2 Typical Application ................................................. 66
10 Power Supply Recommendations ..................... 72
10.1 VDD....................................................................... 72
10.2 VPWR ................................................................... 72
11 Layout................................................................... 72
11.1 Layout Guidelines ................................................. 72
11.2 Layout Example .................................................... 73
12 Device and Documentation Support ................. 74
12.1 Receiving Notification of Documentation Updates 74
12.2 Community Resources.......................................... 74
12.3 Trademarks ........................................................... 74
12.4 Electrostatic Discharge Caution ............................ 74
12.5 Glossary ................................................................ 74
13 Mechanical, Packaging, and Orderable
Information ........................................................... 74
4 Revision History
DATE
August 2017
REVISION
*
NOTES
1st public release of data sheet.
2 Submit Documentation Feedback
Product Folder Links: TPS2388
Copyright © 2015–2017, Texas Instruments Incorporated


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity TPS2388 SLUSC25A – FEBRUARY 2 015 – REVISED AUGUST 2017 TPS2388 IEE E 802.3at 8-Channel Power-over-Ethernet PSE Controller 1 Features •1 Fully IEEE 802.3at Compliant • Port Re-Mapp ing • 1- and 3-Bit Fast Port Shutdown Input • “Never Fooled” 4-Point D etection • Type 1 and Type 2 PD Class ification • Programmable Current Limi t With Foldback • DC Disconnect Detec tion • Flexible Processor Controlled Operating Modes – Semiauto – Manual • 14-Bit Port Current and Voltage Mo nitoring – 100-ms Rolling Port Curren t Averaging – 2% Current Sensing Accu racy – 0.255-Ω Sense Resistor With K elvin Sense • I2C Communication – I 2C Watchdog for Failsafe Operation – 8- and 16-Bit Access Mode Selectable –40°C to 125°C Temperature Operat ion • 56-Lead VQFN Package 2 Applicat ions • Enterprise Switches and Router s • SoHo Switches and Routers • PoE Pass-Through Power Modules • Network Video Recorders (NVRs) 3 Description The T.
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