I am looking at using the LMZM23600 modules as a primary step-down stage in an industrial Modbus networked devices. This type of network has a central 120VC to 24VDC switch mode power supply that is then used to supply a long chain of devices that are placed about 150-200ft apart. Each device taps into the continues run of power cables.
With this topology, the supplied voltage is progressively diminished at each node and the total current is a sum of all the downstream nodes. The number of modules is normally limited by the drop out voltage at the end of the line, but can be in the order of 20 devices with 0.5W to 2W each.
I was reading in the datasheet section 10.3.2 Stability, that there is a need to dampen the circuit with respect to the line resistance and inductance. But in my case, the R and L are different for each node on the network, with the closest module to the power supply having much lower values than the node at the end of the line. Tuning these parameters is not possible during installation so I need some way of optimizing the network as a whole. Using large input capacitors places a large demand on the central supply.
Is there any existing models of such networks that can be used to analyze the transient behavior of such a system.
Any help to get a better handle on this topic is appreciated.
