LTC4263IDE-1#TRPBF Linear Technology, LTC4263IDE-1#TRPBF Datasheet

IC IEEE 803.2AF CNTRLR 14-DFN

LTC4263IDE-1#TRPBF

Manufacturer Part Number
LTC4263IDE-1#TRPBF
Description
IC IEEE 803.2AF CNTRLR 14-DFN
Manufacturer
Linear Technology
Type
Power Over Ethernet (PoE)r
Datasheet

Specifications of LTC4263IDE-1#TRPBF

Applications
Power Interface Switch for Power Over Ethernet (PoE) Devices
Voltage - Supply
48V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
14-DFN
Current - Supply
1mA
Interface
IEEE 802.3af
Controller Type
Power Sourcing Equipment Controller (PSE)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC4263IDE-1#TRPBFLTC4263IDE-1
Quantity:
1 300
FEATURES
APPLICATIONS
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TYPICAL APPLICATION
30W PSE Output Power
IEEE 802
Operation from a Single 56V Supply
Fully Autonomous Operation Without a
Microcontroller
Internal MOSFET with Thermal Protection
Precision Inrush Control with Internal Sense Resistor
Forced Current PD Detection for Noise Immunity
AC and DC Disconnect Sensing
Legacy PD Detection
Robust Short-Circuit Protection
Pin-Selectable Detection Backoff for Midspan PSEs
LED Driver Indicates Port On and Blinks
Status Codes
Available in a Miniature14-Pin 4mm × 3mm DFN
Package
High Power Endpoint/Midspan PSEs
Single-Port or Multi-Port Power Injectors
Low Port Count PSEs
Environment B PSEs
Standalone PSEs
®
.3af Compatible
56V SUPPLY
ISOLATED
+
0.1μF
100V
Single-Port Fully Autonomous High Power PSE
0.1μF
LED
LEGACY
MIDSPAN
V
V
V
OSC
SS
SS
SS
LTC4263-1
DESCRIPTION
The LTC
use in Power over Ethernet systems. The internal current
limit and short-circuit protection are designed to provide
up to 30W of PSE output power for power hungry PoE
applications such as WAPs, security cameras and RFID
readers.
The LTC4263-1 includes IEEE 802.3af compliant PD detec-
tion circuitry along with selectable AC and DC disconnect
sensing, allowing seamless operation in conventional
IEEE 802.3af systems as well as propriety, high power
applications. The LTC4263-1 simplifi es PSE implementa-
tion, needing only a single supply and a small number of
passive support components. Onboard control algorithms
provide complete PSE functionality without the need of a
microcontroller and built-in foldback and thermal shutdown
provide comprehensive fault protection. An LED pin indi-
cates the state of the port and detection backoff timing is
confi gurable for either endpoint or midspan operation.
The LTC4263-1 is available in a miniature 14-pin 4mm ×
3mm DFN package.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
ACOUT
V
V
DD48
OUT
OUT
DD5
V
SD
SS
®
4263-1 is a high power, single PSE controller for
Single PSE Controller
with Internal Switch
SMAJ58A
1A
0.1μF
100V
42631 TA01
MAGNETICS
TO PORT
High Power
LTC4263-1
42631fa
1

Related parts for LTC4263IDE-1#TRPBF

LTC4263IDE-1#TRPBF Summary of contents

Page 1

... The LTC4263-1 is available in a miniature 14-pin 4mm × 3mm DFN package. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Single-Port Fully Autonomous High Power PSE 0.1μ ...

Page 2

... LTC4263CDE-1#PBF LTC4263CDE-1#TRPBF LTC4263IDE-1#PBF LTC4263IDE-1#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: For more information on tape and reel specifi ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T relative to V unless otherwise noted. (Note 2, Note 5) SS SYMBOL PARAMETER Power MOSFET R On-Resistance ON I OUT Pin Leakage OUT_LEAK R OUT Pin Pull-Up Resistance to V ...

Page 4

LTC4263-1 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T relative to V unless otherwise noted. (Note 2, Note 5) SS SYMBOL PARAMETER Timing Characteristics t Detection Time DET t Detection Delay DETDLY t Power Turn-On Delay PON t ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS Powering an IEEE 802.3af PD V DD48 POWER ON DETECTION DETECTION PHASE 1 PHASE 2 V OUT 10V/DIV V SS 42631 G01 100ms/DIV Midspan Backoff with Invalid PD V DD48 t DBO V OUT 2V/DIV R = ...

Page 6

LTC4263-1 TYPICAL PERFORMANCE CHARACTERISTICS Current Limit and Foldback 675 600 525 450 375 300 225 150 – V (V) DD48 OUT 42631 G03 I DC Supply Current ...

Page 7

TEST TIMING Detect and Turn-On Timing PD INSERTED V DD48 t DET V OUT t t DETDLY PON DC Disconnect Timing I I OUT MIN V DD48 V OUT MPS PORT TURN-ON 42631 TT01 t MPDO 42631 ...

Page 8

LTC4263-1 PIN FUNCTIONS LED (Pin 1): Port State LED Drive. This pin is an open- drain output that pulls down when the port is powered. Under port fault conditions, the LED will fl ash in patterns to indicate the nature ...

Page 9

... BLOCK DIAGRAM 14 V DD5 R LED + 1 LED 56V – – 0.1μF 7 OSC BOLD LINES INDICATE HIGH CURRENT Hot Swap IS A TRADEMARK OF LINEAR TECHNOLOGY CORPORATION V DD48 11 5V REG INT5 EXT5 V DD5 3 500k CONTROL I DET Hot Swap TM LTC4263 0.1μF 2 LEGACY 3 MIDSPAN TO PORT ...

Page 10

LTC4263-1 APPLICATIONS INFORMATION POE OVERVIEW Over the years, twisted-pair Ethernet has become the most commonly used method for local area networking. The IEEE 802.3 group, the originator of the Ethernet standard, has defi ned an extension to the standard, IEEE ...

Page 11

APPLICATIONS INFORMATION accidentally powered. Disconnect with either methods using the LTC4263-1 is fully compliant and insures safe power removal after PD disconnect. Com- mand and control for the LTC4263-1 is handled internally without the need of a ...

Page 12

LTC4263-1 APPLICATIONS INFORMATION Power Control The primary function of the LTC4263 control the delivery of power to the PSE port. In order to provide a robust solution, a variety of current limit and current monitoring functions are needed, ...

Page 13

APPLICATIONS INFORMATION 750 600 450 300 150 – V (V) DD48 OUT Figure 5. Current Limit Foldback Thermal Protection The LTC4263-1 includes thermal overload protection in order to provide full ...

Page 14

... Power over Ethernet AC disconnect system (PSE, transformers, cabling, PD, etc.) is complex; deviating from the recommended values DET DET discouraged. Contact the Linear Technology Applications department for additional support. Internal 110Hz AC Oscillator The LTC4263-1 includes onboard circuitry to generate a 110Hz (typ), 2V sine wave on its OSC pin when a P-P 0.1μ ...

Page 15

APPLICATIONS INFORMATION Table 1. Port Status and LED Flash Codes PORT STATUS Non-Powered Device 0Ω < R < 200Ω PORT Port Open R > 1MΩ PORT Port On 25kΩ Low Signature Resistance 300Ω < R < 15kΩ PORT High Signature ...

Page 16

... CABLE two independent DC/DC converters in the PD. Using a 2-pair architecture with the LTC4263-1 allows delivery of 25W to the PD while using a 4-pair architecture allows delivery of 50W. Contact Linear Technology applications support for detailed information on implementing 2-pair and 4-pair PoE systems. Common Mode Chokes Both non-powered and powered Ethernet connections achieve best performance for data transfer and EMI when a common mode choke is used on each port ...

Page 17

APPLICATIONS INFORMATION PSE + 0.1μF 0.1μF V DD48 Tx 56V LTC4263-1 V DD5 Rx 0.1μF SMAJ58A 58V – V OUT SS + 0.1μF 0.1μF V DD48 Tx 56V LTC4263-1 V DD5 Rx 0.1μF SMAJ58A 58V – V OUT SS Figure ...

Page 18

LTC4263-1 APPLICATIONS INFORMATION If the port voltage reverses polarity and goes positive, the OUT pin can be overstressed because this voltage is stacked on top of the 56V supply. In this case, the transient suppresser is used to clamp the ...

Page 19

... SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. DE Package 14-Lead Plastic DFN (4mm × ...

Page 20

... Quad IEEE 802.3af Power Over Ethernet Controller LTC4263 Single IEEE 802.3af Compliant PSE Controller LTC4264 High Power PD Interface Controller LTC4267 IEEE 802.3af PD Interface with Switcher ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 20 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● ...

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