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SN65HVD1786: RS485 SN65HVD96 TINA SPICE model for simulation received power PoL

Part Number: SN65HVD1786

hello,

I am working on the Power over Line which couples data and power over 2 cables. Bellow the schematic of the intended circuit which includes the SN65HVD1876 RS485.

In fact, the idea is to power the RS485 in the reception side (right side) with the power transfered over the cables. A regultor is used to output 5volt. After simulating this circuit the output results are depicted in figures bellow: 

As we note that, there is a fluctuation on the Received side on the Pin (DLC2,etc..) which is pin may be the ground of the receiver! Unfortunately, this point is not stable and it creates too much problems! I also tried to use a diode bridge, but still facing the same problem.

Do you have any suggestions/recommandation for this circuit to make it work properly?

I am available if you need more information!

Thanks

Regards,

Oussayran