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LM3485: TINA/SPICE model simulation - current sensing

Part Number: LM3485

Hi there,

I am using the SPICE model of the LM3485 in TINA. When I configure the circuit as shown in the datasheet (Figure 27, TINA circuit below), I get convergence errors when attempting to simulate the circuit.

However when I instead use a sense resistor (circuit below), I can simulate the circuit without any issues.

Is there any reason that I cannot simulate the first circuit configuration? Any help is greatly appreciated!

Kind regards,