TPS54620: Math equation to analyze the closed loop response

loi cheng poon

Prodigy 30 points

Part Number: TPS54620

I would like to analyze the loop bandwidth and phase margin for my selected compensation network. Any reference?

over 4 years ago

0 Yitzhak Bolurian over 4 years ago

TI__Mastermind 18370 points

Hi Loi,

TPS54620 offers WEBENCH, PSPICE and Excel calculation tool for analyzing the loop:

https://www.ti.com/product/TPS54620#design-development##design-tools-simulation

Please select one of the options available using the above link.

Regards,

Yitzhak Bolurian

0 loi cheng poon over 4 years ago in reply to Yitzhak Bolurian

Prodigy 30 points

The excel spreadsheet does not have any equation to analyze the loop bandwidth and phase margin. The webench does provide the loop response info but I am looking for math equations to do simple analysis on my own.

0 Lishuang Zhao over 4 years ago in reply to loi cheng poon

TI__Expert 7500 points

Hi，

On the other way, you can use load transient to estimate phase margin in real circuit. https://www.ti.com/lit/an/slva289b/slva289b.pdf

Thanks,

Lishuang

0 Yitzhak Bolurian over 4 years ago in reply to Lishuang Zhao

TI__Mastermind 18370 points

Hi Loi,

I am closing this post as we do not have anything beyond the tools that were already provided.
Hope you will be able to address your concern using one of the offered tools.

Regards,

Yitzhak Bolurian

Power management

Power management forum

TPS54620: Math equation to analyze the closed loop response