Datasheet

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D−8 PW−8

FEATURES APPLICATIONS

DESCRIPTION

Input

Current

RTN

Detect Classify

PowerUp

and

Inrush

Class3

(PG-RTN)

Note: AllVoltagesWithRespecttoVSS.

Current

Pair

TPS2375-1

SMAJ58A

0.1 F,100V,10%m

24.9kW

VDD

VSS

CLASS

DET

RTN

100k

(2)

TODC/DC

CONVERTER

ILIM

178kW

RJ-45

DF01S

2Places

Datato

EthernetPHY

Datato

EthernetPHY

DET

CLASS

357

(1)

ILIM

100V

Notes:

1)Class3PDdepicted

2)PGpullupresistorisoptional.

Pair

Spare

Pair

Spare

Pair

data sheet

TPS2375-1

TPS2377-1

www.ti.com

......................................................................................................................................................... SLVS570A – MARCH 2005 – REVISED APRIL 2008

IEEE 802.3af PoE POWERED DEVICE CONTROLLERS WITH AUTO-RETRY

• VoIP Phones

• Auto-Retry After Current-Limit Fault

• WLAN Access Points

• TPS2375-1: IEEE 802.3af Thresholds

• Security Cameras

• TPS2377-1: Legacy Thresholds

• Internet Appliances

• Fully Supports IEEE 802.3af Specification

• POS Terminals

• Integrated 0.58- Ω , 100-V, Low-Side Switch

• 15-kV System Level ESD Capable

PRODUCT SELECTOR

• Programmable Inrush Current Control

2375-1 2377-1 2375 2376 2377

• Fixed 450-mA Current Limit

UVLO 802.3af Legacy 802.3af Adjustable Legacy

Protection Auto-Retry Auto-Retry Latch Latch Latch

• Open-Drain, Power-Good Reporting

Package PW D D, PW D,PW D,PW

• Industrial Temperature Range: -40 ° C to 85 ° C

• 8-Pin SOIC and TSSOP Packages

These easy-to-use 8-pin integrated circuits contain all of the features needed to develop an IEEE

802.3af-compliant powered device (PD). The TPS2375-1 and TPS2377-1 are second generation PDCs (PD

Controllers) featuring a 100-V ratings and true open-drain, power-good function. These devices are auto-retry

versions of selected TPS2375 family members. Information on the TPS2375/6/7 devices can be found on the

TPS2375/6/7 data sheet (SLVS525A ).

In addition to the basic functions of detection, classification, and undervoltage lockout (UVLO), these controllers

include an adjustable inrush limiting feature. The TPS2375-1 has 802.3af-compliant UVLO limits, and the

TPS2377-1 has legacy UVLO limits.

The TPS2375 family specifications incorporate a voltage offset of 1.5 V between its limits and the IEEE 802.3af

specifications to accommodate the required input diode bridges used to make the PD polarity insensitive.

Additional resources can be found on the TI Web site www.ti.com.

Figure 1. Typical Application Circuit and Start-Up Waveforms

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.

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.

Summary of content (25 pages)

PAGE 1
data sheet D−8 TPS2375-1 TPS2377-1 PW−8 www.ti.com ......................................................................................................................................................... SLVS570A – MARCH 2005 – REVISED APRIL 2008 IEEE 802.3af PoE POWERED DEVICE CONTROLLERS WITH AUTO-RETRY FEATURES APPLICATIONS • • • • • • • • • • • • • • • • 1 Auto-Retry After Current-Limit Fault TPS2375-1: IEEE 802.3af Thresholds TPS2377-1: Legacy Thresholds Fully Supports IEEE 802.
PAGE 2
data sheet TPS2375-1 TPS2377-1 SLVS570A – MARCH 2005 – REVISED APRIL 2008 ......................................................................................................................................................... www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
PAGE 3
data sheet TPS2375-1 TPS2377-1 www.ti.com .........................................................................................................................................................
PAGE 4
data sheet TPS2375-1 TPS2377-1 SLVS570A – MARCH 2005 – REVISED APRIL 2008 ......................................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS (continued) V(VDD) = 48 V, R(DET) = 24.9 kΩ, R(CLASS) = 255 Ω, R(ILIM) = 178 kΩ, and –40°C ≤ TJ ≤ 125°C, unless otherwise noted. Positive currents are into pins. Typical values are at 25°C.
PAGE 5
data sheet TPS2375-1 TPS2377-1 www.ti.com ......................................................................................................................................................... SLVS570A – MARCH 2005 – REVISED APRIL 2008 DEVICE INFORMATION FUNCTIONAL BLOCK DIAGRAM 12 V VDD 8 DET 3 Detection Comparator + - 22 V CLASS 2 10-V Regulator Classification Comparator PG 6 + PG Comparator - 1.5 V & 10 V Delay 150 mS + S Q 1 = Inrush R 2.5 V UVLO Comp.
PAGE 6
data sheet TPS2375-1 TPS2377-1 SLVS570A – MARCH 2005 – REVISED APRIL 2008 ......................................................................................................................................................... www.ti.com TPS2375-1/77-1 (TOP VIEW) 1 ILIM VDD 2 CLASS N/C DET PG VSS RTN 3 4 8 7 6 5 TERMINAL FUNCTIONS PIN NAME PIN NUMBER I/O DESCRIPTION ILIM 1 O Connect a resistor from ILIM to VSS to set the start-up inrush current limit.
PAGE 7
data sheet TPS2375-1 TPS2377-1 www.ti.com ......................................................................................................................................................... SLVS570A – MARCH 2005 – REVISED APRIL 2008 The CLASS pin must not be shorted to ground. DET: Connect a resistor, R(DET), between DET and VDD. This resistor should equal 24.9 kΩ, ±1% for most applications. R(DET) is connected across the input line when V(VDD) lies between 1.4 V and 11.
PAGE 8
data sheet TPS2375-1 TPS2377-1 SLVS570A – MARCH 2005 – REVISED APRIL 2008 ......................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS Graphs over temperature are interpolations between the marked data points. I(VDD) + I(RTN) IN DETECTION 6 11.
PAGE 9
data sheet TPS2375-1 TPS2377-1 www.ti.com ......................................................................................................................................................... SLVS570A – MARCH 2005 – REVISED APRIL 2008 TYPICAL CHARACTERISTICS (continued) Graphs over temperature are interpolations between the marked data points. TPS2377-1 UVLO FALLING vs TEMPERATURE INRUSH STATE TERMINATION THRESHOLD vs TEMPERATURE 30.65 350 30.55 30.50 30.45 −40 −20 0 20 40 60 80 300 93.
PAGE 10
data sheet TPS2375-1 TPS2377-1 SLVS570A – MARCH 2005 – REVISED APRIL 2008 ......................................................................................................................................................... www.ti.com APPLICATION INFORMATION OVERVIEW The IEEE 802.3af specification defines a process for safely powering a powered device (PD) over a cable, and then removing power if a PD is disconnected.
PAGE 11
data sheet TPS2375-1 TPS2377-1 Operational Mode www.ti.com ......................................................................................................................................................... SLVS570A – MARCH 2005 – REVISED APRIL 2008 PD Powered Idle Classification Detection V(VDD) V(CU_H) 1.4V V(CL_ON) V(UVLO_F) V(UVLO_R) V(CU_OFF) Figure 17. Threshold Voltages DETECTION This feature of IEEE 802.
PAGE 12
data sheet TPS2375-1 TPS2377-1 SLVS570A – MARCH 2005 – REVISED APRIL 2008 ......................................................................................................................................................... www.ti.com UNDERVOLTAGE LOCKOUT (UVLO) The TPS2375-1 incorporates an undervoltage lockout (UVLO) circuit that monitors line voltage to determine when to apply power to the downstream load and allow the PD to power up. The IEEE 802.
PAGE 13
data sheet TPS2375-1 TPS2377-1 www.ti.com ......................................................................................................................................................... SLVS570A – MARCH 2005 – REVISED APRIL 2008 current limit remains at 450 mA and PG goes open-drain. If the overload has caused V(RTN-VSS) to exceed 10 V while the MOSFET was disabled, then the current limit is set to the inrush level and PG remains low.
PAGE 14
data sheet TPS2375-1 TPS2377-1 SLVS570A – MARCH 2005 – REVISED APRIL 2008 ......................................................................................................................................................... www.ti.com Referencing PG to RTN simplifies the interface to the downstream dc/dc converter or other circuit because it is referenced to RTN, not VSS. Care must be used in interfacing the PG pin to the downstream circuits.
PAGE 15
data sheet TPS2375-1 TPS2377-1 www.ti.com ......................................................................................................................................................... SLVS570A – MARCH 2005 – REVISED APRIL 2008 Inserting a Diode in This Location With Option 2, Allows PoE To Start With Aux Power Present. ~ + VDD R (DET) 0.
PAGE 16
data sheet TPS2375-1 TPS2377-1 SLVS570A – MARCH 2005 – REVISED APRIL 2008 ......................................................................................................................................................... www.ti.com ESD The TPS2375-1 has been tested using the surge of EN61000-4-2 in an evaluation module (EVM) using the circuit in Figure 1. The levels used were 8-kV contact discharge and 15-kV air discharge.
PAGE 17
data sheet TPS2375-1 TPS2377-1 www.ti.com ......................................................................................................................................................... SLVS570A – MARCH 2005 – REVISED APRIL 2008 Transient Suppressor Voltage transients on the TPS2375-1 can be caused by connecting or disconnecting the PD, or by other environmental conditions like ESD. The TPS2375-1 is specified to operate with absolute maximum voltages V(VDD-VSS) and V(RTN-VSS) of 100 V.
PAGE 18
PACKAGE OPTION ADDENDUM www.ti.
PAGE 19
PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 (4) Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Top-Side Marking for that device. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.
PAGE 20
PACKAGE MATERIALS INFORMATION www.ti.com 11-Jun-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TPS2375PWR-1 TSSOP PW 8 2000 330.0 12.4 7.0 3.6 1.6 8.0 12.0 Q1 TPS2377DR-1 SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.
PAGE 21
PACKAGE MATERIALS INFORMATION www.ti.com 11-Jun-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS2375PWR-1 TSSOP PW 8 2000 367.0 367.0 35.0 TPS2377DR-1 SOIC D 8 2500 367.0 367.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.