TPSF12C1: How to ensure that the noise detected during noise detection is not the compensated noise?

Hongxing Yi

Prodigy 30 points

Part Number: TPSF12C1

Tool/software:

How to ensure that the noise detected during noise detection is not the compensated noise?

2 months ago

0 Naresh Adepu 2 months ago

TI__Expert 6545 points

Hello Hongxing,

It's a feedback-based system. Whenever the noise is detected, it is sensed, and the injected signal is injected back to cancel the noise. Over time, the noise is getting canceled. Please refer to [FAQ] TPSF12C1 and TPSF12C3 power-supply filter IC FAQs - Power management forum - Power management - TI E2E support forums for more details

thanks and regards,

Naresh

0 Hongxing Yi 2 months ago in reply to Naresh Adepu

Prodigy 30 points

Hello Naresh,

First of all, thank you very much. I need to understand further: Is it the case that injection does not occur during detection? That is, after detection is completed, then injection takes place, and injection does not occur during detection. This cycle repeats. If detection and injection occur simultaneously, and the qualified noise detected is after injection, then the noise cancellation will not be injected, and subsequently the noise will exceed the standard. Is my understanding incorrect?

thanks and regards,

Hongxing

+1 Naresh Adepu 2 months ago in reply to Hongxing Yi

TI__Expert 6545 points

Hello Hongxing,

Yes, your understanding is correct. Injection and Detection does not occur simultaneously and occur with a delay of the feedback loop. That is where we say AEF sensing and cancellation action happens in 150kHz to 3MHz region.

Thanks and Regards,

Naresh.

0 Hongxing Yi 2 months ago in reply to Naresh Adepu

Prodigy 30 points

Hello Naresh,

Thanks very much！

Thanks and Regards,

Hongxing

0 Naresh Adepu 2 months ago in reply to Hongxing Yi

TI__Expert 6545 points

Thanks. I am Closing the ticket for now.