LTC4291IUF#TRPBF
ActivePOE++ PSE DIGITAL CONTROLLER
Deep-Dive with AI
Search across all available documentation for this part.
LTC4291IUF#TRPBF
ActivePOE++ PSE DIGITAL CONTROLLER
Deep-Dive with AI
Technical Specifications
Parameters and characteristics for this part
| Specification | LTC4291IUF#TRPBF |
|---|---|
| Auxiliary Sense | False |
| Internal Switch(s) | False |
| Mounting Type | Surface Mount |
| Number of Channels | 8 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 24-WFQFN Exposed Pad |
| Power - Max [Max] | 71.3 W |
| Standards | 802.3bt, 802.3at (PoE+), 802.3af (PoE) |
| Supplier Device Package | 24-QFN (4x4) |
| Type | Controller (PSE) |
| Voltage - Supply [Max] | 3.6 V |
| Voltage - Supply [Min] | 3 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tape & Reel (TR) | 2500 | $ 3.26 | |
Description
General part information
LTC4291-1 Series
The LTC4291-1 /LTC4292chipset is a 4-port power sourcing equipment (PSE) controller designed for use in IEEE 802.3bt Type 3 and 4 compliant Power over Ethernet (PoE) systems. The LTC4291-1 / LTC4292 is designed to power compliant 802.3af, 802.3at, and 802.3bt PDs. The LTC4291-1 / LTC4292 chipset delivers lowest-in-industry heat dissipation by utilizing low RDS(ON)external MOSFETs and 0.15Ω sense resistance per power channel. A transformer-isolated communication protocol replaces expensive opto-couplers and complex isolated 3.3V supply, resulting in significant BOM cost savings.Advanced power management features include per-port 14-bit current monitoring, programmable current limit, and versatile fast shutdown of preselected ports. Advanced power management host software is available under a no-cost license. PD detection uses a proprietary multipoint detection mechanism ensuring excellent immunity from false PD identification. Autoclass and 5-event physical classification are supported. The LTC4291-1 / LTC4292 includes an I2C serial interface operable up to 1MHz. The LTC4291-1/LTC4292 is pin or I2C programmable to negotiate PD delivered power up to 71.3W.
Documents
Technical documentation and resources