TPS565208: PSPICE model giving unexpected switching frequency

Randy Hirmiz

Part Number: TPS565208

Hey Team!

Working with this PSPICE model and running some output ripple tests. I noticed that the frequency of waves of the switch node is off. Instead of being ~526kHz, it's ~5/6MHz:

10 months ago

0 Shuai Fan 10 months ago

TI__Genius 13031 points

Hi RANDY!

Could you show your pspice schematic? Let me check it.

Shuai

0 Randy Hirmiz 10 months ago in reply to Shuai Fan

TI__Prodigy 160 points

It's the built-in model for the device:

I just edited the load, R1, and the inductance to match some specifications.

+1 Shuai Fan 10 months ago in reply to Randy Hirmiz

TI__Genius 13031 points

Hi Randy!

I just guess the waveform you measured is during start up. Could you waiting more time and measured the steady state?

Shuai

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TPS565208: PSPICE model giving unexpected switching frequency