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Product Detailed Parameters
- Description：IC POE CNTRL 1 CHANNEL 28QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Type：Controller (PD)
- Number of Channels：1
- Power - Max：71 W
- Internal Switch(s)：No
- Auxiliary Sense：Yes
- Standards：802.3at (PoE+), 802.3af (PoE)
- Voltage - Supply：60V (Max)
- Current - Supply：2mA (Max)
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：28-WFQFN Exposed Pad
- Supplier Device Package：28-QFN (4x5)
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Overview
The LT4295HUFD#PBF is a Powered Device (PD) interface controller compliant with IEEE 802.3af, 802.3at, and 802.3bt standards. It integrates forward and flyback converter control for high-power applications up to 71W. The device operates within a supply voltage range of 60V and supports a junction temperature range from -40°C to +125°C. It utilizes a 28-lead QFN package measuring 4mm x 5mm.
Feature Summary
- Integrates forward and flyback controller functions for efficient power conversion
- Supports five-event classification detection for IEEE 802.3bt compliance
- Enables optocoupler-less flyback operation via auxiliary voltage sensing
- Provides robust surge protection with 100V absolute maximum rating
Applications
- High-power wireless data systems
- Outdoor security camera equipment
- Commercial and public information displays
- Applications requiring extended high-temperature operation
Procurement Notes
Verify the specific suffix HUFD against official Analog Devices documentation to confirm the exact temperature grade and package variant. Ensure compatibility with the intended PCB footprint and thermal management requirements for the 28-lead QFN configuration before procurement.
Selection Notes
Select this component for designs requiring integrated PoE PD interface and DC-DC conversion in a compact form factor. Consider the wide operating temperature range for harsh environments. Evaluate system efficiency needs, as external MOSFETs are recommended for optimal performance.
Part Context
This part belongs to the LT4295 series of IEEE 802.3bt Powered Device controllers. It is designed to replace legacy solutions by combining classification logic with power stage control. The series supports migration from LTPoE++ to standard IEEE protocols while maintaining pin compatibility with earlier models like the LT4276.
Replacement Considerations
The LT4295 series maintains pin compatibility with the LT4276A/B/C series. Verify that the replacement meets the specific thermal and electrical requirements of the target application.
