LT4275AIMS#PBF
ActiveLTPOE++/POE+/POE PD CONTROLLER
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LT4275AIMS#PBF
ActiveLTPOE++/POE+/POE PD CONTROLLER
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Technical Specifications
Parameters and characteristics for this part
| Specification | LT4275AIMS#PBF |
|---|---|
| Auxiliary Sense | True |
| Current - Supply | 2 mA |
| Internal Switch(s) | False |
| Mounting Type | Surface Mount |
| Number of Channels [custom] | 1 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 C |
| Package / Case | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) |
| Power - Max [Max] | 90 W |
| Standards | LTPoE++, 802.3at (PoE+), 802.3af (PoE) |
| Supplier Device Package | 10-MSOP |
| Type | Controller (PD) |
| Voltage - Supply [Max] | 60 VDC |
| Voltage - Supply [Min] | 23 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | Updated |
|---|---|---|---|---|
| Digikey | N/A | 483 | $ 6.29 | 1m+ |
| Tube | 1 | $ 6.49 | 1m+ | |
| 10 | $ 4.39 | |||
| 25 | $ 3.85 | |||
| 100 | $ 3.24 | |||
| 250 | $ 2.95 | |||
| 500 | $ 2.77 | |||
| 1000 | $ 2.62 | |||
| 2500 | $ 2.46 | |||
Description
General part information
LT4275 Series
The LT4275 is a pin-for-pin compatible family of IEEE 802.3 and LTPoE++ powered device (PD) controllers.The LT4275A employs a proprietary LTPoE++ classification scheme, delivering 38.7W, 52.7W, 70W or 90W of power at the PD RJ45 connector. The LT4275A is fully compatible with IEEE 802.3. The LT4275B is an IEEE 802.3at compliant, Type 2 (PoE+) PD delivering up to 25.5W. The LT4275C is an IEEE 802.3af compliant, Type 1 (PoE) PD delivering up to 13W.The LT4275 internal charge pump provides an N-channel MOSFET solution, eliminating a larger and more costly P-channel MOSFET. A low RDS(ON)MOSFET also maximizes power delivery and efficiency, reduces power and heat dissipation, and eases thermal design. Startup inrush current is adjustable with an external capacitor. The LT4275 also includes a power good output, on-board signature resistor, undervoltage lockout, and thermal protection. The LT4275A/LT4275B drives a single opto-coupler to indicate the power level of the attached PSE. Pin-selectable support for non-standard low voltage operation is provided. Auxiliary power override is supported with the AUX pin.The LT4275A can be configured to support all possible LTPoE++, 802.3at and 802.3af power levels with external component changes.ApplicationsHigh Power Wireless Data SystemsOutdoor Security Camera EquipmentCommercial and Public Information DisplaysHigh Temperature Industrial Applications
Documents
Technical documentation and resources
