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ADI LT4275AIDD#PBF product image
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ADI LT4275AIDD#PBFRoHS

Manufacturer
ADI
MPN
LT4275AIDD#PBF
LCSC Part #
C580180
Packaging
DFN-10(3x3)
Customer #
Key Attributes
LTPoE++/PoE+/PoE PD Controller
Datasheetpdf iconADI LT4275AIDD#PBF

Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Power Over Ethernet (PoE) Controllers
ManufacturerADI
PackagingDFN-10(3x3)
TypePowered Device (PD)
Operating Temperature-40℃~+85℃
Support PoE standardIEEE 802.3 af(PoE);IEEE 802.3 at(PoE+)
number of channels1
Power - Max90W
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging121
Sales UnitPiece

Introduction

AI Translation

The LT4275 is a pin-compatible family of IEEE 802.3 and LTPoE++ Powered Device (PD) controllers. The LT4275A employs a proprietary LTPoE++ classification scheme to deliver 38.7W, 52.7W, 70W, or 90W of power over an PDRJ45 connector. The LT4275A is fully compliant with IEEE 802.3. The LT4275B is an IEEE 802.3at Type 2 (PoE+) compliant PD controller capable of delivering up to 25.5W. The LT4275C is an IEEE 802.3af Type 1 (PoE) compliant PD controller capable of delivering up to 13W. The LT4275's internal charge pump enables an N-channel MOSFET solution, eliminating the need for a larger and more costly P-channel MOSFET. A low RDS(ON) MOSFET maximizes delivered power and efficiency, reduces power and thermal dissipation, and simplifies thermal design. Startup inrush current is adjustable via an external capacitor. The LT4275 also integrates a power good output, built-in signature resistor, undervoltage lockout, and thermal protection circuitry. The LT4275A/LT4275B drives a single optocoupler to indicate the power classification level of the connected Power Sourcing Equipment (PSE). Pin-selectable support for non-standard low-voltage operation is provided. Auxiliary power priority is supported via the AUX pin. The LT4275A can be configured through external component changes to support all possible LTPoE+, 802.3at, and 802.3af power classification levels.

Features

AI Translation
  • IEEE 802.3af/at and LTPoE++ Powered Device (PD) Controller
  • LTPoE++ supports power levels up to 90W
  • LT4275A supports all of the following standards: LTPoE+ 38.7W, 52.7W, 70W, and 90W; compliant with IEEE 802.3at (25.5W); compliant with IEEE 802.3af (up to 13W)
  • LT4275B compliant with IEEE 802.3at/af
  • LT4275C compliant with IEEE 802.3af
  • 100V absolute maximum input voltage
  • Wide junction temperature range (-40°C to 125°C)
  • Overtemperature protection
  • Integrated signature resistor
  • External Hot Swap N-channel MOSFET for minimum power dissipation and maximum system efficiency
  • Programmable auxiliary supply support down to 9V
  • Optional non-standard low-voltage PoE support
  • Available in 10-lead MSOP and 3mm × 3mm DFN packages

Applications

AI Translation
  • High-power wireless data systems
  • Outdoor security camera equipment
  • Commercial and public information displays
  • High-temperature industrial applications
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QtyUnit Price(Reference Only)Total Amount
1+$ 5.9033$ 5.90
10+$ 5.1113$ 51.11
30+$ 4.6275$ 138.83
100+$ 4.2235$ 422.35
Standard Packaging121/Full Tube
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