• State TI Thinks Resolved
  • Locked Locked
  • Replies 8 replies
  • Answers 2 answers
  • Subscribers 64 subscribers
  • Views 219 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS53681: TPS53681 + CSD95410RRB Solution

SHYAMKUMAR MURALEEDHARAN
Prodigy 70 points
Part Number: TPS53681

Tool/software:

Hi TI Team,

I am planning to use TPS53681 + 3x CSD95410 solution for my design to power the SoC core voltage.

Below are my design requirements:

Input voltage: 12V
Output voltage: 0.75V
Output current: 60A

I would like to know the following details based on the above specifications.

1. Whether TPS56381 + 3x CSD95410 solution can support here?
2. What is the default output voltage set from the factory?
3. Is there options to control the output voltage at the initial power ON to save my SoC from damage if the default factory set voltage is different from my required voltage?
4. What is the MP and support status for both the chips?
5. Whether heat sink is required for my application?
6. Is that fine if I am using only one output voltage configuration

Also please let me know if there are any other better solutions which is suitable for my application.

Regards
Shyam

  • 0
    TI__Intellectual 1870 points

    Hi Shyam,

    I will get back to you soon.

    Thanks,

    Sam

  • 0
    TI__Intellectual 1870 points

    Hi Shyam,

    1. Yes, you can use this. The controller and smart power stage both support tri-state PWM.

    2. The default output voltage is set to be 0.5V and you can configure the output voltage through PMbus described in section 7.5.3, page 46.

    3. Yes, you can review section 7.5.3 and the Technical Reference Manual to configure your required output voltage before connecting to your SoC.

    4. Both devices are active and supported by TI. There are also supporting documents such as EVM guides, app notes, etc.

    5. No, a heat sink is not required since the design requirements are not near the operating maximum values.

    6. Yes, it is fine that you plan to use only one output voltage configuration.

    Thanks,

    Sam

  • 0 in reply to Sam Yang
    Prodigy 70 points

    Hi Sam,

    Thank you for your quick response.

    I have some space contraints in my PCB, so Is it ok to use 2x CSD95410 here as my current requirement is 60A?

    Regards

    Shyam

  • 0 in reply to SHYAMKUMAR MURALEEDHARAN
    TI__Intellectual 1870 points

    Hi Shyam,

    Yes, this device supports up to 40A DC RMS current and supports up to 90A peak continuous current. Thanks.

    Regards,

    Sam

  • 0 in reply to Sam Yang
    Prodigy 70 points

    Hi Sam,

    Is it possible to get the free sample EVAL board of this solution? If yes could you please help me in ordering and getting this?

    Regards

    Shyam

  • 0 in reply to SHYAMKUMAR MURALEEDHARAN
    TI__Intellectual 1870 points

    Hi Shyam,

    Please feel free to send Eric Payet @e-payet@ti.com an email to request a free EVM, or you can place an order via this link: TPS53681EVM-002 Evaluation board | TI.com. Thanks.

    Regards,

    Sam

  • 0 in reply to Sam Yang
    Prodigy 70 points

    HI Sam,

    I can see the power sequence data for the TPS53681 device in the datasheet Figure 96. StartUp Waveforms but I couldn´t able to see the power sequencing timings requirements. In my design the input supply is 12V and I am planning to generate 5V and 3.3V from the same 12V input. This 5V and 3.3V will connect to the TPS53681 device and also to the other peripheral devices which works at the same voltages. If there are any power sequencing timings required to follow, then I may need to modify my power tree.

    Could you please share the information and help me here?

    Regards

    Shyam

  • 0 in reply to SHYAMKUMAR MURALEEDHARAN
    TI__Intellectual 1870 points

    Hi Shyam,

    This controller required a 3.3V supply at the V3P3 pin and a 12V Vin supply. It is required that the 3.3V supply and the 5V supply are ready and stable before the 12V supply to ensure the device provides the pre-start up overvoltage protection. Since you mentioned that you're generating 3.3V and 5V from a 12V input, to follow the recommended power up sequence, you should still try to generate 3.3V and 5V rails before turning on the 12V rail such as a pre-regulator. The 3.3V rail powers internal digital logic which is used for fault protection and recording. Figure 96 is what we recommend for the controller to monitor the power sequence. Thanks.

    Regards,

    Sam