TPS54320: The control loop simulation results aren't aligned with test reult.

Frank Xiao

Genius 12055 points

Part Number: TPS54320

Hi team,

My customer is using the TPS54320 now. But the control loop test and simulation result are not aligned. Do you know why and have some suggestions?

simuliation:

test:

Thank you.

Frank

over 8 years ago

0 Jason Wang (BSR-MV) over 8 years ago

TI__Genius 9550 points

Frank,

Please double check the Iout setting.

If Iout is same when simulate and board test?

Jason Wang

0 Frank Xiao over 8 years ago in reply to Jason Wang (BSR-MV)

TI__Genius 12055 points

Hi Jason,

i have simulate the board from 0.3A to 3A. The cross frequency are all over 35khz. But the test result is only 25khz. The similate software is TINA. The test instruments is AP300. Thanks.

BR
Frank

0 JohnTucker over 8 years ago in reply to Frank Xiao

TI__Guru**** 191445 points

Are you testing the EVM or your own board?

0 Frank Xiao over 8 years ago in reply to JohnTucker

TI__Genius 12055 points

Their own board. Thanks.

Frank

0 JohnTucker over 8 years ago in reply to Frank Xiao

TI__Guru**** 191445 points

There may be parasitics or other down stream load components that they do not have modeled correctly. The difference between their measured results and the simulation are not that large. It would not take much difference in teh model to get those results.

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TPS54320: The control loop simulation results aren't aligned with test reult.