Silicon Laboratories Si3454-KIT, User Manual

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Confidential Rev. 0.1 11/15 Copyright © 2015 by Silicon Laboratories Si3454-KIT
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1. Introduction
The Si3454 8-port evaluation kit (Si3454-KIT) is intended for Power over Ethernet (PoE) Power Sourcing
Equipment (PSE) system designers interested in evaluating the 4-port Si3454 PSE controller.
The Si3454 is controlled through an I
2
C (or SMBus) interface. For convenience in evaluation, a graphical user
interface (GUI) is provided, giving an easy-to-use visual display and control of the Si3454 I
2
C registers. The
evaluation kit assumes the user has access to a PC to control the evaluation board using the provided GUI.
The user is also responsible for providing an appropriate high-voltage power supply. The power supply should be
45 to 57 V for normal PoE or 51 to 57 V for PoE+. The Si3454 can supply over 30 W to each port. Thus, the two
Si3454 controllers for the 8-port demo system can provide over 240 W of total power. Normally, a 50 to 100 W
power supply is used. While the classification and actual current consumption of each port is available, the demo
GUI interacts with the Si3454 on a per-port basis and does not implement system-level power management.
Contact Silicon Laboratories for more information about system-level power management options.
The Si3454-KIT kit has been thoroughly tested for standards compliance and interoperability. Contact Silicon
Laboratories for test reports using Sifos PoE test equipment and University of New Hampshire PoE standards
compliance and interoperability reports.