LTC4279IS#PBF PoE Power Sourcing Equipment (PSE) by Analog Devices

Status: Production
Series: LTC4279
RoHS: Compliant
Download Datasheet Visit Manufacturer Site View Pricing & Stock

The LTC4279 is an autonomous single port power sourcing equipment (PSE) controller designed for use in IEEE 802.3at Type 1, Type 2 and LTPoE++ compliant Power over Ethernet (PoE) systems. The LTC4279 provides fully autonomous IEEE 802.3 and LTPoE++ compliant operation without a microcontroller. The LTC4279 simplifies PSE implementation, requiring only a single supply and a small number of passive support components.The LTC4279 delivers lowest-in-industry heat dissipation by utilizing a low-RDS(ON) external MOSFET and a 0.1Ω sense resistor, eliminating the need for expensive heat sinks and increasing efficiency.PD discovery uses a proprietary dual-mode 4-point detection mechanism ensuring excellent immunity from false PD detection. Midspan PSEs are supported with physical layer classification and a 2.5 second backoff timer.Legacy and custom PDs are supported with pin-selectable LEGACY and UltraPWR modes. LEGACY mode detects and powers pre-IEEE specification PDs. UltraPWR mode aggressively turns on and powers custom PDs requiring high inrush and/or operational currents.

Where to Buy

Prices starting from US$6.10

Distributor Stock
Logo for Newark
Newark Electronics
from US$6.52
137
in stock
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Logo for element14 Singapore
element14
from US$7.40
137
in stock
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Logo for Farnell UK
Farnell
from US$6.10
137
in stock
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Logo for Richardson RFPD
Richardson RFPD
from US$6.30
0
in stock
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Features

Compliant with IEEE 802.3at Type 1 and 2
Supports LTPoE++® Up to 90W
Supports Dual-Signature PDs
Fully Autonomous Operation without Microcontroller
Very Low Power Dissipation
0.1Ω Sense Resistance
Low RDS(ON) External MOSFET
Very High Reliability 4-Point PD Detection
2-Point Forced Voltage and Forced Current
Robust Short-Circuit Protection
Cable Surge Protected ±80V OUT pin
Classification Dependent ICUT and ILIM Current Thresholds
Supports 2-Pair and 4-Pair Output Power
UltraPWR Mode Supports Custom PDs up to 123W
Pin-Selectable Detection Backoff Timer for Midspans
Pin Programmable Legacy PD Detection
Pin Programmable Maximum Power Mode
Status LED Pin
Available in 20-Pin QFN and 16-Pin SO Packages

Last 6 months Inventory & Pricing History


Alternative Descriptions

Pse Controller, 57V, Nsoic-16 | Newark Electronics
PSE CONTROLLER, 57V, NSOIC-16 | element14
Power Over Ethernet PSE Controller 45V 57V 90W 16-Pin SOIC N | Richardson RFPD


LTC4279IS#PBF Semiconductors - ICs by Linear Technology

POE/POE+/LTPOE++/PSE CONTROLLER SOIC-16

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Input Voltage 57V
Output Current -
UVLO 25V
Controller IC Case Style SOIC
No. of Pins 16Pins
Duty Cycle (%) 6.3%
Frequency -
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Frequently Asked Questions

Where can I find additional details, specifications and documents for a LTC4279IS#PBF?

Additional datasheets, footprints and schematics for LTC4279IS#PBF are listed on our Part Details page. You can also find images and similar parts to LTC4279IS#PBF on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for LTC4279IS#PBF on our Product Comparison page. Access via the 'View Pricing & Stock' button to view LTC4279IS#PBF price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does LTC4279IS#PBF fall under?

The LTC4279IS#PBF is listed under PoE Power Sourcing Equipment (PSE).

Can I view similar or alternative parts?

You can view similar parts to LTC4279IS#PBF when available in the PoE Power Sourcing Equipment (PSE) range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the LTC4279IS#PBF you can contact the distributor directly for product support, shipping queries etc.

Is the LTC4279IS#PBF RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Analog Devices.

Which authorised distributors for LTC4279IS#PBF have stock available?

Authorised distributors including Newark Electronics, element14, Farnell and Richardson RFPD have stock available or on a lead time for LTC4279IS#PBF.

How do I check stock and lead times for all distributors?

Stock availability and lead times will be displayed for LTC4279IS#PBF often in real-time on the comparison pages.

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