TPS7H6023-SP: Referece pspice model (TPS7H60x3_trans.dsn) behavior

Atsushi Okamrua

Part Number: TPS7H6023-SP

Tool/software:

Very high current measured on highside driver "ASW" terminal. Is it correct behavior ?

I found it on the original TPS7H60x3_trans.dgn simulation on PSPICE for TI.

The measured procedure is following.

1. Exstract the reference design and open in the PSPICE for TI.

Filename which I downloded "snom790.zip" from

2. Select .\tps7h60x3_trans.dgn\BUCK folder and Choose "Make root".

3. Double click "page" and open "Open-Loop Buck Schematic"

4. Select "New simulation profile", add name as "open-loop-buck-sim", and press "Create" button.

Change "Run To Time" box to "1ms" and press "OK" button.

5. "Run P-SPICE"

6. Add current probe on "ASW" terminal of TPS7H60X3_TRANS and check the current.

7. I measured the following wave form.

8. Is it correct behavior ? I found more than 80KA of spike current on the terminal.

Best Regards.

0 Daniel Hartung over 1 year ago

Hey Atsushi,

Does the converter run as intended?

Ground currents in models are often incorrect and not representative of the actual device.
ASW is a "ground" of the device.

Thanks,
Daniel

0 Atsushi Okamrua over 1 year ago in reply to Daniel Hartung

Thank you Daniel-san

Yes, I tested buck converter driver insted push-pull design.

I use a TPS7H60x3 pspice model in buck converter design. It frequenly makes a convergense error.

Then I tested original schematic behavior.

Thanks,

Atsushi

0 Daniel Hartung over 1 year ago in reply to Atsushi Okamrua

Hey Atsushi,

If you are able could you share your schematic so we can look at it?

That way we can identify the bug.

Thanks,
Daniel

Power management forum