LTC4263CS datasheet(1/24 Pages) LINER

部件名	LTC4263CS

功能描述	Single IEEE 802.3af Compliant PSE Controller with Internal Switch

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制造商	LINER [Linear Technology]

网页	http://www.linear.com

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LTC4263

1

4263fe

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Single IEEE 802.3af

Compliant PSE Controller

with Internal Switch

The LTC

®4263 is an autonomous single-channel PSE

controller for use in IEEE 802.3af compliant Power over

Ethernet systems. It includes an onboard power MOSFET,

internal inrush, current limit, and short-circuit control,

IEEE 802.3af compliant PD detection and classiﬁcation

circuitry, and selectable AC or DC disconnect sensing.

Onboard control algorithms provide complete IEEE 802.3af

compliant operation without the need of a microcontroller.

The LTC4263 simpliﬁes PSE implementation, needing

only a single 48V supply and a small number of passive

support components.

Programmable onboard power management circuitry

permits multiple LTC4263s to allocate and share power

in multi-port systems, allowing maximum utilization of

the 48V power supply—all without the intervention of a

host processor. The port current limit can be conﬁgured

to automatically adjust to the detected PD class. Detec-

tion backoff timing is conﬁgurable for either Endpoint or

Midspan operation. Built-in foldback and thermal protection

provide comprehensive fault protection.

An LED pin indicates the state of the port controlled by

the LTC4263. When run from a single 48V supply, the LED

pin can operate as a simple switching current source to

reduce power dissipation in the LED drive circuitry.

The LTC4263 is available in 14-pin 4mm × 3mm DFN and

14-pin SO packages.

n IEEE 802®.3af Compliant

n Operation from a Single 48V Supply

n Fully Autonomous Operation without

Microcontroller

n Internal MOSFET with Thermal Protection

n Power Management Works Across Multiple Ports

with Simple RC Network

n Precision Inrush Control with Internal Sense Resistor

n Powered Device (PD) Detection and Classiﬁcation

n AC and DC Disconnect Sensing

n Robust Short-Circuit Protection

n Pin-Selectable Detection Backoff for Midspan PSEs

n Classiﬁcation Dependent ICUT Current Threshold

n LED Driver Indicates Port On and Blinks

Status Codes

n Available in 14-Pin SO and 4mm × 3mm DFN Packages

n IEEE 802.3af Compliant Endpoint/Midspan PSEs

n Single-Port or Multi-Port Power Injectors

n Power Forwarders

n Low-Port Count PSEs

n Environment B PSEs

n Standalone PSEs

Single-Port Fully Autonomous PSE

4263 TA01

0.1μF

100V

0.1μF

100V

SMAJ58A

LED

LEGACY

MIDSPAN

PWRMGT

VSS

OSC

LTC4263

ISOLATED

48V SUPPLY

+

–

TO PORT

MAGNETICS

VDD5

ENFCLS

SD

VDD48

OUT

ACOUT

1A

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of

Linear Technology Corporation. Hot Swap and ThinSOT are trademarks of Linear Technology

Corporation. All other trademarks are the property of their respective owners.

类似零件编号 - LTC4263CS

制造商	部件名	数据表	功能描述
Linear Technology	LTC4263CS-PBF	356Kb / 24P	Single IEEE 802.3af Compliant PSE Controller with Internal Switch
Linear Technology	LTC4263CS-TRPBF	356Kb / 24P	Single IEEE 802.3af Compliant PSE Controller with Internal Switch

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类似说明 - LTC4263CS

制造商	部件名	数据表	功能描述
Linear Technology	LTC4263-1	288Kb / 20P	High Power Single PSE Controller with Internal Switch
Linear Technology	LTC4263	356Kb / 24P	Single IEEE 802.3af Compliant PSE Controller with Internal Switch
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Linear Technology	LTC4263	359Kb / 24P	Single IEEE 802.3af Compliant PSE Controller with Internal Switch
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