LT4293
Info : RECOMMENDED FOR NEW DESIGNS
searchIcon
cartIcon

LT4293

LTPoE++/IEEE 802.3bt PD Interface Controller

Show More showmore-icon

Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 8
1ku List Price Starting From $2.07
Features
  • LTPoE++®/IEEE 802.3bt Powered Device (PD) Controller
  • Supports Up to 90W PDs
  • Distinguishes Between LTPoE++ and IEEE 802.3bt PSEs
  • 5-Event Classification Sensing
  • Superior Surge Protection (100V Absolute Maximum)
  • Wide Junction Temperature Range (–40°C to 125°C)
  • Overtemperature Protection
  • Integrated Signature Resistor
  • External Hot Swap N-Channel MOSFET for Lowest Power Dissipation and Highest System Efficiency
  • Configurable Aux Power Support as Low as 9V
  • Pin Compatible with LT4275A/B/C and LT4294
  • Available in 10-Lead MSOP and 3mm × 3mm DFN Packages
Additional Details
show more Icon

The LT4293 is an LTPoE++/IEEE 802.3af/at/bt-compliant powered device (PD) interface controller. The T2P output distinguishes between LTPoE++ and IEEE 802.3bt power sourcing equipment (PSE) during mutual identification and negotiation of available power.

The LT4293 utilizes an external, low RDS(ON), N-channel, hot swap MOSFET and supports the LT4320/LT4321 ideal bridges, to extend the end-to-end power delivery efficiency and eliminate costly heat sinks. The LT4293 also includes a power good output, onboard signature resistor, undervoltage lockout, and thermal protection. Start-up inrush current is adjustable with an external capacitor. Auxiliary power override is supported as low as 9V with the AUX pin.

The LT4293 can be configured to support all possible LTPoE++, 802.3bt, 802.3at and 802.3af power levels with external component changes. Pin-for-pin compatibility with the LT4275 and LT4294 family of PD Interface Controllers enables easy migration between LTPoE++ PDs and IEEE 802.3bt-compliant PDs.

 

Applications 

  • High Power Wireless Data Systems
  • Outdoor Security Camera Equipment
  • Commercial and Public Information Displays
  • High Temperature Industrial Applications
Part Models 8
1ku List Price Starting From $2.07

close icon
Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT4293HDD#PBF
  • HTML
  • HTML
LT4293HDD#TRPBF
  • HTML
  • HTML
LT4293HMS#PBF
  • HTML
  • HTML
LT4293HMS#TRPBF
  • HTML
  • HTML
LT4293IDD#PBF
  • HTML
  • HTML
LT4293IDD#TRPBF
  • HTML
  • HTML
LT4293IMS#PBF
  • HTML
  • HTML
LT4293IMS#TRPBF
  • HTML
  • HTML

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0244

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

Feb 4, 2020

- 20_0130

Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LT4293HMS#PBF

PRODUCTION

LT4293HMS#TRPBF

PRODUCTION

LT4293IMS#PBF

PRODUCTION

LT4293IMS#TRPBF

PRODUCTION

Jun 5, 2024

- 24_0003

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0244

arrow down

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

Feb 4, 2020

- 20_0130

arrow down

Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LT4293HMS#PBF

PRODUCTION

LT4293HMS#TRPBF

PRODUCTION

LT4293IMS#PBF

PRODUCTION

LT4293IMS#TRPBF

PRODUCTION

Jun 5, 2024

- 24_0003

arrow down

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC2911A

LT4293, LT4321 IEEE 802.3bt and LTPoE++ Interoperable Powered Device

zoom

DC2911A

LT4293, LT4321 IEEE 802.3bt and LTPoE++ Interoperable Powered Device

LT4293, LT4321 IEEE 802.3bt and LTPoE++ Interoperable Powered Device

Product Detail

Demonstration circuit 2911A is an IEEE 802.3bt compliant and LTPoE++ interoperable Power over Ethernet (PoE) Powered Device (PD). It features the LT4293 PD interface controller and the LT4321 PoE ideal diode bridge controller.

The LT4293 provides LTPoE++, IEEE 802.3af (PoE, Type 1), IEEE 802.3at (PoE+, Type 2), and IEEE 802.3bt (PoE++, Type 3 and 4) compliant interfacing. It utilizes an external, low RDS(ON) (30mΩ typical) N-channel MOSFET for the Hot Swap function to improve efficiency.

Power good (PWRGD) output indicates the PD controller is ready to provide power to the downstream load. This signal can be used to enable an isolated power supply. The T2P output indicates the available power from the Power Sourcing Equipment (PSE). This signal communicates allocated power from either LTPoE++ or IEEE 802.3bt-compliant PSEs to the downstream PD circuitry.

The LT4321 controls eight low RDS(ON) (57mΩ typical) N-channel MOSFETs to further improve end-to-end power delivery efficiency and ease thermal design. This solution replaces the eight diodes typically found in a passive PoE rectifier bridge.

The DC2911A accepts up to 90W of delivered power from a PSE via the RJ45 connector (J1) or a local 48V DC power supply using the auxiliary supply input. When both supplies are connected, the auxiliary supply input has priority over the PoE input.

Recently Viewed