TPS62871: Measuring Feedback Loop

Tomas Almeida

Part Number: TPS62871

Tool/software:

Hi,

Could you please clarify on where to break the feedback loop, and insert an injection resistor, to measure the loop gain and phase for a TPS62871 design?

Best Regards,

Tomás Almeida

over 1 year ago

+1 Chris Glaser over 1 year ago

TI__Guru**** 150760 points

Hi Tomas,

Section 4.1.3 in the EVM user's guide for the power module version of this device gives the details and some example plots: https://www.ti.com/lit/ug/sluucv0b/sluucv0b.pdf

It is the standard setup, where a resistor is added in the FB path (VOSNS for this device).

Thanks,

Chris

Power management

Power management forum

TPS62871: Measuring Feedback Loop