LNK626 model

Posted by: Markus Nabecker on 07/22/2015

Dear PI-Support!

I need to prove the stability of the control-loop in our flyback-topology using LNK626.

For that I would need an simulation model of LNK626.

A Spice-model would be perfect! If a spice-model is not available I can also try to use another one (e.g. Simplis).

-------

Do you have some other advices to prove the stability of our control-loop?

Kind regards!

Comments

Hi,

we do not have any simulation model available for LNK626.

However you can find out the control loop stabilty by doing step response tests.

Regards,

PI-NANO

Hello!

I have already done some step response tests.

But I've done these test under typical conditions without any stress factors (temperature, ...).

I'm sure that I can do this test also in a climate-chamber but there are also the toleraces of the different components in my circuit.

In simulation I'am able to do a worst case scenario - but this seems very hard to do in reality! Do you have another advice how to prove the stability of the control loop under worst-case conditions?

Kind regards!

Hi,

I have contacted the product designer and they informed me that we are not supporting any simulation model.

If you want to do the tolerace analysis you can find the min and max values in the datasheet.

One way to do is calculate all the worst case parameters in your design and modify your design with same exact component values and then do the step response tests.

Regards,

PI-NANO