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TL431: SPICE model: Internal node 0 prevents use as ref to negative regulation?

Part Number: TL431

Hi,

Is there a reason why the spice model for the TL431 seems to make use of node 0 which as global ground, prevents its use as reference to negative regulation?

This is particularly critical in more complex circuits such as multi-output SMPSs, where relocating grounds to make sims work is just not practical.

.SUBCKT TL431 7 6 11
*             K A FDBK
R_R18         0 N16955548  1 TC=0,0

Why?

Moreover, other models that don't use node 0 seem to work fine.

If I am correct, can you please offer a model that is not internally tied to node 0?

Thanks in advance for your help

Fernando Fonseca

Snr. Power Elec Eng

Wallbox Chargers SLU