Datasheet for LTC4291-1:
- Manufacturer Part Number : LTC4291-1
- Manufacturer : AD
- Description : 4-Port IEEE 802.3bt PoE PSE Controller
- Series : LTC4291-1
- Reference Price : USD 1.6
- Our Price : We have a better price, contact us by email
- Product Type : Power-over-Ethernet (PoE) Interface Controllers
- Function : PoE Power Sourcing Equipment (PSE)
- Current Suggest : Recommended for New Designs
- Status : Production
- RoHS Status: -
- Voltage: -
- Feature: -
- Package Case: -
- Temperature Range: -
- Packing: Reel/Tray/Tube
- Standard Packing Quantity: -
- Country of Origin: -
- Other Part Number : LTC4291-1
- Shipping methods : DHL FEDEX UPS TNT
- Delivery Time : Ship within 1 day.
- Manufacturer Production time : 6-8 weeks (Normally have stocks)
- Weight : 0.001KG
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- Four PSE Ports
- Two Power Channels per Port
- Fully Compliant IEEE 802.3bt Type 3 and 4 PSE
- Compliant Support for Type 1, 2, 3, and 4 PDs
- Low Power Path Dissipation per Channel
- 150mΩ Sense Resistance
- 30mΩ or Lower MOSFET RDS(ON)
- Chipset Provides Electrical Isolation
- Eliminates Optos and Isolated 3.3V Supply
- Very High Reliability Multipoint PD Detection
- Connection Check Distinguishes Single-Signature and Dual-Signature PDs
- Continuous, Dedicated Per-Port Power and Current Monitoring
- Per-Port Power Policing
- 1MHz I2C Compatible Serial Control Interface
- Pin or I2C Programmable PD Power Up to 71.3W
- Available in a 40-Lead 6mm × 6mm (LTC4292) and 24-Lead 4mm × 4mm (LTC4291-1) QFN Packages
The LTC4291-1/LTC4292 chipset is a 4-port powersourcing equipment (PSE) controller designed for use inIEEE 802.3bt Type 3 and 4 compliant Power over Ethernet(PoE) systems. The LTC4291-1/LTC4292 is designed topower compliant 802.3af, 802.3at, and 802.3bt PDs. TheLTC4291-1/LTC4292 chipset delivers lowest-in-industryheat dissipation by utilizing low RDS(ON) externalMOSFETs and 0.15Ω sense resistance per power channel.A transformer-isolated communication protocol replacesexpensive opto-couplers and complex isolated 3.3V supply,resulting in significant BOM cost savings.
Advanced power management features include per-port14-bit current monitoring, programmable current limit,and versatile fast shutdown of preselected ports. Advancedpower management host software is available under a no-costlicense. PD detection uses a proprietary multipointdetection mechanism ensuring excellent immunity fromfalse PD identification. Autoclass and 5-event physicalclassification are supported. The LTC4291-1/LTC4292includes an I2C serial interface operable up to 1MHz. TheLTC4291-1/LTC4292 is pin or I2C programmable to negotiatePD delivered power up to 71.3W.
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
