Other Parts Discussed in Thread: TPS23882, TPS23861, TPS23861EVM-612, MSP430F5234
I have two questions:
1. Our application needs 8 POE ports that support either 802.3af or 802.3at power levels. TPS23881RTQR is advertised as a 4-port 802.3bt device. The datasheet is not very clear on this but it seems that It can be used to power eight 802.3at type POE ports (where each port can be programmed to be limited to 802.3af or 802.3at power levels).Please confirm.
2. The reference schematic on page 19 of SLVUBP0A EVM document VPWR (positive supply voltage) is connected to data pair 2 (pins 3&6 of the RJ45) but according to the POE standard it should be connected to data pair 1 (pins 1&2 of the RJ45). Similarly the PSE_Nx signal is connected to data pair 1 but should be connected to data pair 2.