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AM62A7: PMIC for AM62A7

Michael Jeong1
Expert 2630 points
Part Number: AM62A7
Other Parts Discussed in Thread: TPS65219, TPS62867

Hello Expert,

We are using combination of AM62A74 + PTPS65931211RWERQ1.

But PTPS65931211RWERQ1 size is so big in our application.

So we are considering to change from PTPS65931211RWERQ1(8x8mm) to TPS65219(5x5mm).

Here is question.

We need 2 TOPS performance.

1. If we use TPS6521902 (VDD_Core = 0.75V), is there no problem to get 2 TOPS?

2. If not, do we have to use TPS6521908 (VDD_Core = 0.75V)? or give me your guide?

3. We want to buy TPS6521908, but we can't find this part in TI.COM.

    What's the status of this part?

Best Regards,

Michael

  • 0
    TI__Mastermind 20277 points

    Hello Michael,

    I'm looping the expert for TPS65219XX part to better assist you, but to cut down on the questions:

    I'm not familiar with TOPS, could you elaborate on this metric?

    BR,

    Nicholas

  • 0
    TI__Mastermind 22186 points

    Hi Michael,

    Thank You for using E2E. The TPS65219 PMIC can be configured to power AM62Ax but Buck1 is up to 3A so you will need an external Buck converter to supply VDD_CORE. Could you please provide the information below so we can help identify the right PMIC solution for your application needs?

    • PMIC rating (i.e automotive or industrial)?
    • PMIC input supply (i.e 3.3V or 5V)?
    • Memory (LPDDR4 or DDR4)?
    • VDD_CORE voltage (0.75V or 0.85V)?
    • Project schedule? when do you need production devices?

    Thanks,

    Brenda

  • 0 in reply to Brenda Diaz
    Expert 2630 points

    Hi Brenda,

    Here is what you requested.

    I think that you need to communicate w/ EP(AM62A74) team for confirmation about my inquiry.

    Could you please send to me about my blue character of question ASAP?

    1. PMIC rating (i.e automotive or industrial)? Industrial

    2. PMIC input supply (i.e 3.3V or 5V)? 5V

    3. Memory (LPDDR4 or DDR4)? LPDDR4

    4. VDD_CORE voltage (0.75V or 0.85V)?

    We need to clarify VDD_CORE & VDDR_CORE voltage.

    I would like to know whether the VDD_CORE & VDDR_CORE voltage has anything to do with the performance of 2tops for deep learning.

    So the VDD_CORE & VDDR_CORE voltage is very important to choose of PMIC for AM62A74.

    Do I have to use external Buck converter?

    https://www.ti.com/lit/ug/slvucm0/slvucm0.pdf?ts=1695633459955&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS65219%253FkeyMatch%253DTPS6521908

    5. We want to buy TPS6521908, but we can't find this part in TI.COM.

        What's the status of this part?

        Is it available sample for evaluating?

        When can I find it in TI.COM?

    Best Regards,

    Michael

  • 0 in reply to Michael Jeong1
    TI__Mastermind 22186 points

    Hi Michael,

    Please find my feedback below and let us know if you have any questions. 

    • AM62x and AM62Ax are two different processors. AM62Ax have higher VDD_CORE current requirements. Here is a link to an apps note showing the AM62Ax Maximum Current Ratings: https://www.ti.com/lit/pdf/sprada7  

    • The TPS65219 PMIC can be configured to power the AM62Ax but it needs an external discrete Buck to meet the VDD_CORE current requirements. The capture below shows an example Power Delivery Network (PDN) for an application using 5V input supply and LPDDR4. TI can create a new TPS65219 orderable with a custom NVM configuration if the application meets the volume requirements or customers can use the TPS6521905 (user-programmable version).

    • The VDD_CORE voltage selection does affect the performance of 2TOPS for deep learning. At the high level, 850 MHz can provide 1.7 TOPS while 1000 MHz is required for the 2 TOPS. 1000 MHz is only supported at 0.85V VDD_CORE. Please refer to section "Operating Performance Points" in the AM62Ax data sheet for more details. Column "C7x" in the Device Speed Grades table is the deep learning engine. 

    • What is the project schedule? For non-automotive applications, you can use TPS65219 or a new PMIC that is currently under development and will support multiphase configuration for higher output current.   

    Thanks,

    Brenda

  • 0 in reply to Brenda Diaz
    Expert 2630 points

    Hi Brenda,

    Thanks for your kind explanation.

    Project schedule is early 24Q2 and application is non-automotive.

    What is the best solution for power on AM62A74?

    Could you please give me some recommendations?

    Here is what I think.

    Case-1 : TPS65931211RWERQ1

    Case-2 : TPS6521908 + TPS62867

    Best Regards,

    Michael

  • 0 in reply to Michael Jeong1
    TI__Mastermind 22186 points

    Hi Michael,

    Below are the current PMIC solution to power AM62A for non-automotive/non-functional safety applications. Let us know if you have any questions. 

    • for high volume (TPS65219 + external discrete): TI can create a new TPS65219 orderable part number with custom NVM settings to match the power diagram below. This solution integrates the 3.3V and 1.8V rails in the PMIC. 

    • for low volume
      • #1 (TPS65219 + external discrete): TI provides the NVM file with the custom register settings and customer programs the TPS6521905 PMIC. This solution integrates the 3.3V and 1.8V rails in the PMIC. This is the recommended option for low volume. 
      • #2 TPS6521908 + external discrete: This option requires an external power switch when using 3.3V supply or an external 3.3V Buck converter when using 5V supply. A second discrete Buck is needed to supply the CORE rails (i.e. VDD_CORE and VDDR_CORE) at 0.85V. Buck1 on the TPS6521908 will still require the input and output cap even if the rail is not used because it is enabled by default in the NVM settings. 

    •   For projects that needs production devices starting in 3Q2024 or later, we recommend using the new PMIC that is currently under development.   

    Thanks,

    Brenda