LTE2426 problem

[elki]

Hello,

I am trying to get + and - voltages from two batteries using TLE2426 with the following setup. Naively, I would expect the initial voltage to be split in two halves, however, I see a very asymmetric output. I am probably missing something very simple. Any ideas would be appreciated!

[Jwillis]

Check this out https://e2e.ti.com/blogs_/b/powerhouse/posts/the-top-three-ways-to-split-a-voltage-rail-to-a-bipolar-supply

[Zero999]

Is this in real life or a simulator?

If it's a simulator, then it could be an issue with the model having internal nodes connected to 0V.

Connect the negative side to 0V and create a new node, called centre, for the 0V. All plots will have to have V(centre) subtracted from them.


I wish I had Googled. It is a problem with the model. Refer to the thread on the TI forum.
https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1197958/tle2426-spice-model-doesn-t-work-in-floating-circuits

EDIT:
Update:
Here's an example schematic:


Note that the output voltage is referenced to com, LTSpice's alternative to the ground 0 rail.

[elki]

Thanks a lot! This problem appeared in simulation only. Thanks for pointing me to that known issue with the model!