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LM5116: Failing to Simulate DC-DC Inverting Converter 12V to (-5V) Design Using LM5116 from Powerbench

Nyasha Masuka
Prodigy 245 points
Part Number: LM5116
Other Parts Discussed in Thread: TINA-TI,

Tool/software:

Good day,

I have created a 12V to (-5V) inverting converter using the LM5116 on Powebench. However, when I build and simulate the recommended design in TINA-TI, I get the "Convergence problem, check analysis parameters".

Here is the schematic and the simulation file:

LM5116.TSC

How best can I simulate this without getting an error?

Thank you.

  • 0
    TI__Guru 59331 points

    Hello Nyasha 

    The TINA model is modelled for typical buck topology. 

    If you'd like to simulate inverted buck-boost configuration.  Please configure the converter as a normal buck converter, and supply the input supply voltage between the drain connection of the high-side MOSFET and the power inductor output. 

    -EL