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PSPICE-FOR-TI: PSpice-For-TI

Part Number: PSPICE-FOR-TI

I’m working on ta simple schemati with the linear regulator TPS92611  that drives 3 LEDS and i have  a pulse voltage source to simulate input from 7 to 24 V  

 

The  error appear when I try to simulate with lower voltage than the need it to turn on the LEDs by the TPS92611, in this simulation this LEDs has a Vf of 2.5V and If I start the voltage steps at 7V  in the output wiwidnow appaer this error:

ERROR (ORPSIM-16550): floating point computing failed during matrix solution.

Divide by Zero, Dive

"INTERNAL ERROR -- Divide by Zero, Dive

Run abort.

It disappear when increase the input voltage to 7.8, I know than the TPS92611 won’t work at lower voltage, but I would like to see that behavior instead of interrupting the simulation.