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Product Detailed Parameters
- Description：IC POE CNTRL 1 CHANNEL 38QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Type：Controller (PSE)
- Number of Channels：1
- Power - Max：25.5 W
- Internal Switch(s)：No
- Auxiliary Sense：No
- Standards：802.3at (PoE+), 802.3af (PoE)
- Voltage - Supply：3V ~ 4.3V
- Current - Supply：1.1mA
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：38-WFQFN Exposed Pad
- Supplier Device Package：38-QFN (5x7)
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Overview
The LTC4274IUHF#PBF is a single-channel Power over Ethernet (PoE) Powered Device (PD) controller manufactured by Analog Devices. It supports IEEE 802.3af and 802.3at standards, delivering up to 15.4W and 25.5W respectively. The device operates with an input voltage range of 36V to 57V and features an I2C interface for configuration and monitoring. Packaged in a 38-pin QFN, it includes integrated power switches and protection circuits.
Feature Summary
- Integrated single-channel PD controller with built-in power switches
- Supports IEEE 802.3af and 802.3at PoE standards
- I2C interface for programmable control and status monitoring
- Comprehensive protection against overvoltage, overcurrent, and thermal faults
Applications
- IP cameras and video surveillance systems
- Wireless access points and network infrastructure
- VoIP phones and communication devices
- Industrial IoT sensors and controllers
Procurement Notes
Verify the exact part number suffix, as #PBF indicates lead-free RoHS compliance. Confirm package type is 38-QFN. Check manufacturer datasheets for latest revision history and environmental compliance certificates before finalizing procurement specifications.
Selection Notes
Select this component for applications requiring certified PoE+ power delivery via a single channel. Ensure the system design accommodates the 36V-57V input range. Verify that the host microcontroller can support the required I2C communication protocol for device configuration and fault monitoring.
Part Context
This component belongs to the LTC4274 family of PoE PD controllers. It is designed to simplify the implementation of powered devices in Ethernet networks by integrating control logic and power switching into a compact package, reducing external component count and board space requirements.
Replacement Considerations
Direct substitutes include other Analog Devices PoE PD controllers such as the LTC4296 or LTC4297 series, provided they meet the same IEEE 802.3at power budget and pin compatibility requirements. Always verify electrical parameters and pinout compatibility before substitution.
