TPS54383 - Why can't I change the compensation resistor?

jonds

Other Parts Discussed in Thread: TPS54383

When I specify the following settings for a TPS54383, the SwitcherPro model doesn't show me the value of the compensation resistor of the 2nd output. A symbol of a resistor is drawn, but it has no reference designator.

It seems also not possible to edit/change the value. Is it a bug in the model?

Input voltage: 4.75...12.6V

Output1: 3.3V 2A

Output2: 1.2V 2A

note: when I swap the outputs, the problem occurs with the compensation resistor of the first output...

over 16 years ago

Heath Gallimore over 16 years ago

TI__Intellectual 1280 points

This looks like a bug to me.

It's totally missing one of the resitors for this input. I'll check it out asap.

Heath Gallimore over 16 years ago

TI__Intellectual 1280 points

This bug is fixed in the version we released today

jonds over 16 years ago in reply to Heath Gallimore

Prodigy 110 points

strange, it seems still not fixed :-(

I still can't change the value of the 2nd compensation resistor (the one in series with the capacitor); It doesn't have a reference designator either...; in the 'what if' analysis, it is not mentioned...

To be sure I started a new design; On top of the window I see "Software Version:1.2.5", I guess that must be the latest one?

Heath Gallimore over 16 years ago

TI__Intellectual 1280 points

This looks like a separate bug to me.

Basically the software is unable to calculate a compensation for this channel.

That's why the compensation values are coming up blank.

At this point there is no real work around to fix it.

we'll work on it.

Hetal over 16 years ago

TI__Intellectual 2710 points

This bug is fixed in the version v3.1 we released today.

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TPS54383 - Why can't I change the compensation resistor?