SI3459A-B02-IMR

Overview

The SI3459A-B02-IMR is an eight-channel Power Sourcing Equipment (PSE) controller compliant with the IEEE 802.3at standard. It supports up to 30W per port and operates within a supply voltage range of 37V to 57V. The device features a 3.3V operating logic voltage and includes internal current limiting set at 3mA. It functions reliably across a temperature range of -40°C to +85°C. The component is housed in a 56-QFN package measuring 8x8mm.

Feature Summary

• Supports eight independent Ethernet ports for simultaneous power delivery
• Complies with IEEE 802.3at PoE+ standards for enhanced power transfer
• Integrates internal control circuitry for simplified system design

Applications

• Multi-port PoE switch designs
• Power sourcing equipment for LAN infrastructure
• Network access points requiring centralized power management

Procurement Notes

Verify the specific suffix 'IMR' indicates the reel packaging variant, distinct from the tape-and-reel or tray configurations found in other SKUs like SI3459-B02-IM. Confirm end-of-life status as 'Not For New Designs' impacts long-term availability. Ensure compatibility with existing PCB footprints for the 56-QFN package before procurement.

Selection Notes

Select this component when designing systems requiring eight channels of 802.3at compliance. Compare against the SI3459-B02-IM for packaging differences. Consider the SI3474B series if higher power budgets per port are required. Verify that the 3.3V logic interface matches the host microcontroller requirements.

Part Context

This part belongs to the Skyworks SI3459 family of PoE controllers. It serves as a specialized solution for network infrastructure, enabling efficient power distribution over Ethernet cables. The family focuses on integrating control logic to manage power negotiation and delivery securely.

Replacement Considerations

Publicly confirmed substitute: None listed. The datasheet indicates the product status is Not For New Designs. Designers should evaluate alternative multi-channel PSE controllers from current portfolios.