LTC4263 - Single IEEE 802.3af Compliant PSE Controller with Internal Switch

Features

Typical Application

LTC4263
Back to Top

Description

The LTC4263 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. Detection 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.

Back to Top

Packaging

SO-14, DFN-14

LTC4263
LTC4263
Back to Top

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC4263CDE DFN 14 C $4.21 $2.95 View
LTC4263CDE#PBF DFN 14 C $4.21 $2.95 View
LTC4263CDE#TR DFN 14 C $0.00 $3.01 View
LTC4263CDE#TRPBF DFN 14 C $0.00 $3.01 View
LTC4263CDE-1#PBF DFN 14 C $4.21 $2.95 View
LTC4263CDE-1#TRPBF DFN 14 C $0.00 $3.01 View
LTC4263CS SO 14 C $4.21 $2.95 View
LTC4263CS#PBF SO 14 C $4.21 $2.95 View
LTC4263CS#TR SO 14 C $0.00 $3.01 View
LTC4263CS#TRPBF SO 14 C $0.00 $3.01 View
LTC4263IDE DFN 14 I $5.05 $3.54 View
LTC4263IDE#PBF DFN 14 I $5.05 $3.54 View
LTC4263IDE#TR DFN 14 I $0.00 $3.60 View
LTC4263IDE#TRPBF DFN 14 I $0.00 $3.60 View
LTC4263IDE-1#PBF DFN 14 I $5.05 $3.54 View
LTC4263IDE-1#TRPBF DFN 14 I $0.00 $3.60 View
LTC4263IS SO 14 I $5.05 $3.54 View
LTC4263IS#PBF SO 14 I $5.05 $3.54 View
LTC4263IS#TR SO 14 I $0.00 $3.60 View
LTC4263IS#TRPBF SO 14 I $0.00 $3.60 View
Buy Now
Request Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Evaluation Kits

Part Number Description Price
DC981A/B LTC4263 DC981A Midspan demoboard with DC981B Endspan plugin $100.00
Buy Now


Back to Top

Applications

  • IEEE 802.3af Compliant Endpoint/Midspan PSEs
  • Single-Port or Multi-Port Power Injectors
  • Power Forwarders
  • Low-Port Count PSEs
  • Environment B PSEs
  • Standalone PSEs
Back to Top

Simulate

To simulate selected Linear Technology products, please download LTSpice / SwitcherCAD III. This powerful schematic capture and simulation tool includes macro models for 80% of Linear Technology's switching regulators, over 200 op amp models, as well as resistors, transistors and MOSFET models.

For other simulation tools, visit our Design Simulation and Device Models page.

Back to Top