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INA300-Q1: INA300-Q1

Samet ALTUN
Prodigy 110 points
Part Number: INA300-Q1
Other Parts Discussed in Thread: TINA-TI, , INA300

I have a problem about the INA300-Q1 for Spice model. I import the Tina-Ti model to LTSpice. But, If the voltage are read from shunt resistor higher than Vlimit voltage. I get error that 'the time step is too small'. But If the Vlimit voltage is higher than Shunt resistor voltage, I don't take any error. The spice model is running very well if Vlimit voltage is higher than shunt. Have a good day.

  • 0
    TI__Mastermind 21710 points

    Hello Samet,

    Thanks for considering to use Texas Instruments.  Did you try running this in TINA-TI and run into similar issues?  When I run the TINA-TI reference design, the model has no problem with vsense larger or smaller than vlimit.  Could you share your circuit with me? There might be something else that makes the simulation crash when combined with the INA300 model.

  • 0 in reply to Patrick Simmons
    Prodigy 110 points

    Hello Mr. Patrick. You are right. In TINA-TI, There is no problem for INA300-Q1 in TINA-TI.. But in LTSpice, this problem is have. In our design. The shunt resistor is 3mohm. Source is  13.5V. Rlimit resistor is  100 ohm. Vdd 5V. Hysteresis and Delay pin is floating. Latch is grounded.  But, If the voltage are read from shunt resistor higher than Vlimit voltage. I get error that 'the time step is too small'. But If the Vlimit voltage is higher than Shunt resistor voltage, There is no problem. This problem is acceptable for LTSpice, not TINA-TI model.

  • 0 in reply to Samet ALTUN
    TI__Mastermind 21710 points

    Hello Samet,

    As per your message above you acknowledge that our model works in our platform and has issues in our competitor's platform, ltspice. As such I am closing this thread.  However, I have reached out to you for continued support outside of this forum.  Please check your email.