• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 38 subscribers
  • Views 570 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TINA/Spice/TPS62130: The model does not seem to switch to 100% 'pass-through' mode in simulation

Barry Rowland
Intellectual 550 points
Part Number: TPS62130
Other Parts Discussed in Thread: TINA-TI, TPS82130,

Tool/software: TINA-TI or Spice Models

I wanted to evaluate start-up behaviour with Vin = Vout, to see when the TPS62130 would stop switching.  When I tried the simulation in Webench with TPS82130 (which has TPS62130 'core'), it behaved as expected, going to 100% mode at about 400 us, really, at about the time that Vout reached the correct 'trip point' for 100% operation, but the Tina-TI simulation did not seem to switch to 100% mode... Vin at 5.1 V, Vout 5 V

TPS62130 here, in Tina-TI, below, sim results from 82130 from Webench

Webench schematic... feedback resistors same for both cases

  • 0
    TI__Mastermind 39210 points
    Can you split your signals in TINA-TI and confirm your Vin and Vout values again. It looks like Vout is much lower (check feedback resistors).
    Also, please attach your TINA-TI files so we can have a look further (refer to e2e.ti.com/.../592360)
  • 0 in reply to Nikhil Gupta (Product Folder Models)
    Intellectual 550 points

    This simulation is brutally slow on my laptop, sadly.

    Hello!!... I found that, hidden inside the VG1 device, while it LOOKS like it is set to 5 V, it has a 'unit step' parameter, that is not actually shown on the control panel for that device, and was set to 1 V, so that the Vin went to 6 V, instead of 5 V, which was only visible when I attached a voltmeter to the VG1 signal...having parameters 'invisible'  that affect a voltage source is kind of unfair to occasional users!

    Now she runs...