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[FAQ] AM625 / AM623 Custom board hardware design – Ferrite (power supply filter) recommendations for SoC supply rails

Kallikuppa Sreenivasa
Guru*** 144879 points
Other Parts Discussed in Thread: AM62A7-Q1, AM625-Q1, AM620-Q1, AM62A3, AM62P-Q1, AM62A7, AM62P, AM625SIP, AM62A3-Q1, AM625, AM623

Hi TI Experts,

I have the below queries regarding use of ferrite for the SoC supply rails. 

1. Do you have recommendations on using ferrite (power supply filters) for the SoC supply rails

2. Do you have some recommendations to optimize the number of ferrites used

3. I do not want to use any ferrites in my design. Do you have some recommendations

4. Are these recommendations valid for other Sitara processor 

Let me know your thoughts.

  • +1
    TI__Guru*** 144879 points

    Hi Board designers, 

    Refer below inputs for Ferrite (power supply filter) recommendations 

    1. Do you have recommendations on using ferrite (power supply filters) for the SoC supply rails

    Refer SK-AM62B-P1 starter kit (SK) evaluation module schematics for ferrite recommendation.

    https://www.ti.com/tool/SK-AM62B-P1

    2. Do you have some recommendations to optimize the number of ferrites used

    Based on requests from multiple customer, we update the ferrite recommendations.

    Refer SK-AM62-LP AM62x starter kit (SK) evaluation module schematics for ferrite recommendation.

    https://www.ti.com/tool/SK-AM62-LP

    3. I do not want to use any ferrites in my design. Do you have some recommendations

    We are reviewing the request.

    4. Are these recommendations valid for other Sitara processor 

    The recommendations are valid for the following devices.

    AM644x, AM642x, AM641x, AM243x, AM625SIP, AM625-Q1, AM620-Q1, AM62A7, AM62A7-Q1, AM62A3, AM62A3-Q1, AM62P, AM62P-Q1

    Note: 
    Refer below documents during board design.

    Hardware Design Guide for AM625 / AM623 / AM625SIP / AM625-Q1 / AM620-Q1 Family of Processors

    https://www.ti.com/lit/pdf/sprad05

    AM625 / AM623 / AM625SIP / AM625-Q1 / AM620-Q1 / AM62A7 / AM62A3 Schematic Design and Review Checklist

    https://www.ti.com/lit/an/sprad21b/sprad21b.pdf

    Regards,

    Sreenivasa