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I found new problem that we need to discuss how to handle it.
In 3-pair mode during power on state, when a PD don’t want to be powered, it generates e.g. MPS=1.9mA which means PSE must disconnect, but due to the PD that doesn’t meet the backfeed on the unpowered pair, the unpowered pair consumes additional 1.3mA and this is added to the MPS. Under these conditions, the PD will not be disconnected.
Moreover, in general, a constant error of additional MPS current is added by the PSE…..instead of PD only should control the MPS current.
Let’s start to discuss this.
Chief R&D Engineer
Analog Mixed Signal Group
1 Hanagar St., P.O. Box 7220
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