TPS562201: bode plot measurement with pulse skip mode

K.Yaita

Part Number: TPS562201

Hi Team,

May I know if bode plot measurement with pulse skip mode is possible?
I believe the answer is no and it is same as the following case that is PFM (pulse frequency modulation) but would like to confirm just in case.
https://e2e.ti.com/support/power-management/f/196/t/677271

Best Regards,
Yaita

over 5 years ago

0 Young Zhao over 5 years ago

TI__Genius 11990 points

Hi Yaita,

You cannot measure the loop performance in PFM mode generally, but can check the stability in the time domain.

BRs,

Young

0 K.Yaita over 5 years ago in reply to Young Zhao

Guru 29720 points

Hi Young-san,

Thank you for your reply.
Is pulse skip mode of TPS562201 is identical with PFM mode?

Best Regards,
Yaita

0 Young Zhao over 5 years ago in reply to K.Yaita

TI__Genius 11990 points

Hi Yaita,

Yes, pulse skipping mode (PSM) is also known as pulse frequency modulation (PFM) .

BRs,

Young

0 K.Yaita over 5 years ago in reply to Young Zhao

Guru 29720 points

Hi Young-san,

Thank you for your support. I understand.
Is there any application note that shows the following?
>You cannot measure the loop performance in PFM mode generally, but can check the stability in the time domain.

Best Regards,
Yaita

0 Young Zhao over 5 years ago in reply to K.Yaita

TI__Genius 11990 points

Hi Yaita,

I will check if there is any application note for this . and will reply you later next week.

Thanks for understanding .

BRs,

Young

0 K.Yaita over 5 years ago in reply to Young Zhao

Guru 29720 points

Hi Young-san,

Thank you for your kind support.
It's okay if there is.

Best Regards,
Yaita

0 Gerold Dhanabalan - High Performance Radar over 5 years ago in reply to K.Yaita

TI__Genius 14455 points

Here is an article that talks about DCAP2 bode plot model.

https://www.ti.com/lit/an/slva546/slva546.pdf

Regards,

Gerold

Power management

Power management forum

TPS562201: bode plot measurement with pulse skip mode