Hardware, Software, Testing Requirement and Test Result
15
SLVUBN3A – May 2019 – Revised October 2019
Copyright © 2019, Texas Instruments Incorporated
24-Port (4 Pair) Power Sourcing Equipment Reference Design for Multi-port
Applications
•
Multi-power supply mode: RPS and sharing mode:
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Redundant power supply (RPS) mode: in RPS mode, the total power budget equals to the power
budget of the main power supply when both main power supply and backup power supply are
connected. The total power budget equals to backup the power budget of the power supply when
the main power supply is disconnected.
–
Sharing power supply mode: in sharing mode, the total power budget equals to the sum of the
power budget of the two power supplies when both power supplies are connected. The total power
budget equals to the remaining power budget of the power supply if one of the power supplies is
disconnected.
•
Total number of power supplies and the power budget of each power supply.
If there is only one
power supply, the power good signal must be connected to P1.5.
•
Power guard band: when the total allocated power < total power budget - guard band, there is no more
low priority ports to be turned on and the guard band LED will turn on.
Device configuration is mainly used to configure the mapping between the PSE device channels and the
logical RJ45 ports. When mapping a 4-pair port, only channels within the same quad (channel 1–4 or
channel 5–8) can be mapped to one 4-pair port.
Figure 6. GUI Device Configuration