SI3453B-B02-GM

Overview

The SI3453B-B02-GM is a four-channel Power over Ethernet (PoE) controller manufactured by Skyworks Solutions Inc. It supports IEEE 802.3at (PoE+) and 802.3af (PoE) standards for Powered Device (PD) applications. The device operates within a supply voltage range of 45V to 57V and draws a supply current of 4mA. It features internal switches and delivers a maximum power output of 40W. The component is housed in a 40-VFQFN exposed pad package with dimensions of 6x6 mm. It is designed for surface mount installation and functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides four independent channels for PoE power management compliant with 802.3at and 802.3af standards
• Integrates internal switches to simplify circuit design and reduce external component count
• Supports high-power delivery up to 40W for demanding powered device applications

Applications

• Power over Ethernet controllers for network infrastructure equipment
• Powered devices requiring multi-channel power distribution
• Industrial networking hardware operating in extended temperature environments

Procurement Notes

Verify the specific suffix B02 against official Skyworks documentation to confirm pinout and electrical characteristics, as suffixes define functional variants. Confirm end-of-life status and lead times with authorized distributors, as availability may be limited. Ensure compatibility with existing PCB footprints for the 40-QFN package before procurement.

Selection Notes

Select this component when designing systems requiring four-channel PoE control under IEEE 802.3at or 802.3af standards. Consider the 40-WFQFN package constraints and thermal requirements for 40W power handling. Evaluate the 45V-57V input range against the system's power supply architecture to ensure proper operation within specified limits.

Part Context

This part belongs to the SI3453 family of PoE controllers from Skyworks Solutions. It serves as a specialized integrated circuit for managing power delivery over Ethernet cables. The family targets network equipment manufacturers needing compliant, compact solutions for powering remote devices without separate power lines.

Replacement Considerations

Public confirmed substitute: TPS2384PAP (Texas Instruments). Verify pin-to-pin compatibility and electrical parameter alignment before substitution.