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Product Detailed Parameters
- Description：IC POE CNTRL 8 CHANNEL 40QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Type：Controller (PSE)
- Number of Channels：8
- Power - Max：71.3 W
- Internal Switch(s)：No
- Auxiliary Sense：No
- Standards：802.3at (PoE+), 802.3af (PoE), 802.3bt
- Voltage - Supply：3V ~ 3.6V
- Current - Supply：-
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：40-WFQFN Exposed Pad
- Supplier Device Package：40-QFN (6x6)
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Overview
The LTC4292IUJ#PBF is a four-port Power Sourcing Equipment (PSE) controller compliant with IEEE 802.3bt Type 3 and Type 4 standards, designed for PoE systems. It supports powering 802.3af, 802.3at, and 802.3bt Powered Devices (PDs). The device features a maximum on-resistance of 150 mOhms and delivers up to 71.3 W output power per channel. Operating from a 3.3 V supply, it functions within a temperature range of -40°C to +85°C. Packaged in a QFN-40 surface-mount format.
Feature Summary
- Utilizes transformer-isolated communication protocol to replace opto-couplers and isolated supplies
- Provides per-port 14-bit current monitoring and programmable current limits
- Supports autoclassing and five-event physical classification for PD identification
- Enables versatile fast shutdown of preselected ports for advanced power management
Applications
- IEEE 802.3bt Type 3 and Type 4 PoE system implementations
- Power sourcing equipment for 802.3af and 802.3at compliant devices
- High-power Ethernet infrastructure requiring low heat dissipation
Procurement Notes
Verify the specific suffix against official Analog Devices documentation to confirm package type and temperature grade. Confirm RoHS compliance status via the manufacturer's datasheet or product change notifications. Ensure the ordering part number matches the required QFN-40 configuration and operational specifications before procurement.
Selection Notes
Select this component for applications requiring high-efficiency PoE power distribution with minimal thermal output. The integrated transformer isolation reduces bill-of-materials costs compared to opto-coupler solutions. Evaluate the need for host software integration to utilize advanced power management features such as port prioritization and detailed current monitoring.
Part Context
This component belongs to the LTC4292 series, specifically engineered as a chipset for multi-port PoE controllers. It is designed to work alongside companion components like the LTC4291 to provide comprehensive power management solutions for enterprise-grade networking hardware and industrial Ethernet applications.
Replacement Considerations
The LTC4291IUF#PBF is a documented alternative within the same chipset family. Verify compatibility regarding package dimensions and pinout configurations when substituting.
