LM3671 - No realistic TINA Simulation possible

Rolf,

When I changed the circuit to use feedback resistors and a different inductor, I got the model to simulate for 3.3V out correctly. However, for many other output voltages, I did not get the proper simulation.

I am investigating the model currently. Thanks for pointing this out. This part is a little confusing since it is available in many fixed voltage versions as well as the adjustable version.

I'll let you know what I find out.

Britt

Britt,

that's right. But when I set the input voltage to 5V, I get 4.7V output voltage instead of 3.3V.

That's the problem.

Rolf

Rolf,

Try this one. I believe it is correct now for the adjustable version.

Britt

1768.LM3671_TRANS.TSC

Hello Britt,

would be good to update your version with the Transient Reference Design eventually also the model given on this site. http://www.ti.com/product/LM3671/toolssoftware

Cheers Andy

Andy,

The model on the web is for the fixed 2.5V version of the device. It is documented in the TINA-TI reference design. We should probably add the adjustible version to the product folder. This is a case where there are many fixed voltage versions and the adjustable voltage version in the same product folder.

You can also simulate the device in the WEBENCH® Power Designer for all of the fixed voltage versions as well as voltage values where there is not a fixed voltage version.

Britt