TPS62743: Ripple Voltage in TPS62743 under PWM & PFM

Abhijith Prabha

Part Number: TPS62743

HI,

I seen the low load efficiency is improved when switching TPS62743 to PFM mode.

How the output ripple voltage is affected? Could you please provide the comparison of the ripple voltage profile in PWM and PFM.

Thanks and regards.

over 3 years ago

0 Davor Pavlovski over 3 years ago

TI__Expert 3611 points

Hi,

The difference between PWM and PFM mode is shown on Figures 9-15 and 9-16 in the datasheet.
To get a better understanding of the mode of operations, please check Sections 8.3.1 and 8.3.2 in the datasheet.

Regards,
Davor

0 Abhijith Prabha over 3 years ago in reply to Davor Pavlovski

Prodigy 225 points

Thanks for the data. I have seen the application curves. Is there any quantitative analysis of ripple voltage available?

Data on how ripple voltage is changing from PWM to PFM mode or vice versa.

regards

0 Davor Pavlovski over 3 years ago in reply to Abhijith Prabha

TI__Expert 3611 points

Hi,

There is no data for the transition from PWM to PFM or vice versa for this device in particular.
But this app-note goes into detail to explain the smooth transition that DCS control brings: High-efficiency, low-ripple DCS-Control offers seamless PWM/power-save transitions

Regards,
Davor

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TPS62743: Ripple Voltage in TPS62743 under PWM & PFM