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Product Detailed Parameters
- Description：IC POE CNTRL 1 CHANNEL 32DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Type：Controller (PD), DC/DC
- Number of Channels：1
- Power - Max：35 W
- Internal Switch(s)：No
- Auxiliary Sense：No
- Standards：802.3af (PoE)
- Voltage - Supply：57V (Max)
- Current - Supply：3mA (Max)
- Operating Temperature：0°C ~ 70°C
- Mounting Type：Surface Mount
- Package / Case：32-WFDFN Exposed Pad
- Supplier Device Package：32-DFN (7x4)
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Overview
The LTC4268CDKD-1#PBF is a high-power Powered Device (PD) controller from Analog Devices, designed for IEEE 802.3at Power over Ethernet applications. It integrates a synchronous rectifier and a no-optocoupler flyback controller to deliver up to 25.5W of output power. The device operates with an input voltage range of 44V to 57V and provides a regulated 5V output at currents up to 5A. Packaged in a 32-lead DFN, it supports Class 4 PD operation.
Feature Summary
- Integrates a synchronous rectifier and flyback controller without requiring an optocoupler
- Supports high-power IEEE 802.3at Powered Device applications
- Provides isolated DC-to-DC conversion capabilities
Applications
- IEEE 802.3at Powered Device implementations
- High-power PoE endpoint devices
- Synchronous flyback converter designs
Procurement Notes
Verify the specific suffix #PBF against the manufacturer's current datasheet to confirm lead-free compliance and package details. Ensure the component matches the required IEEE 802.3at specifications for your design. Cross-reference the DFN-32 footprint with your PCB layout guidelines. Confirm availability status through authorized distributors as supply conditions may vary.
Selection Notes
Select this component for designs requiring integrated PoE power delivery and isolation in a compact form factor. It is suitable for applications needing up to 25.5W output power. Consider the thermal performance of the DFN-32 package for your enclosure. Verify that the no-opto flyback control scheme meets your efficiency and regulation requirements compared to traditional isolated converters.
Part Context
This part belongs to the LTC4268-1 series of high-power Powered Device controllers. It is functionally related to the LTC4269-1, which also supports similar PoE power levels. The series is designed to simplify the implementation of high-power PoE endpoints by combining detection, classification, and power conversion functions.
Replacement Considerations
The LTC4269CDKD-1#TRPBF is a documented substitute within the same family. Verify compatibility regarding the tape-and-reel packaging format versus tube packaging. Ensure the functional parameters for the flyback controller remain consistent for your specific application requirements.
