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TPS25750: About setting of Sink PDO

Guru 20550 points
Part Number: TPS25750
Other Parts Discussed in Thread: USB-PD-CHG-EVM-01, , BQ25792

Hi Team,

 

Currently, our customer are evaluating the following conditions.

Source: 45W PD adapter

Sink: USB-PD-CHG-EVM-01

Tool: Advance configuration of Application_Customization_Tool ver7.0.3

 

They would like to set 20V/2.25A so know the proper Sink PDO setting.

I understand the following setting.

Is my understanding correct?

 

[Our settings]

Sink PDO1 15W (5V*3A)

Sink PDO2 27W (9V*3A)

Sink PDO3 45W (20V*2.25A)

 

[PDO3 setting picture]

 

Regards,

Hide

  • Hi Hide-san,

    Yes, your understanding is correct. Your Sink PDO3 settings indicate a 20V/2.25A PDO.

    Thank you,
    Eric

  • Hi Eric-san,

     

    I tried a bin file with the following settings.

    However, It didn't do what I expected.

    -Expectations: VBUS=20V

    -Result: VBUS=15V

     

    By the way, I changed adapter form 45W to 60W.

    At the result, VBUS=20V.

     

    However, I would like to set VBUS=20V using 45W adapter.

    Could you please let us know if there is anything wrong with my settings?

     

    [Condition]

    -45W adapter (Compatible with 2V/2.25A)

    -USB-PD-CHG-EVM-01 (Sink setting)

    -bin file of Tool ver7.0.3 with the following conditions

    [Tool settings]

     

     

    Regards,

    Hide

  • Hi Hide-san,

    In order for us to debug this any further, we would need to see a USB-PD trace log. A good, affordable USB-PD adapter that we recommend is from total phase: https://www.totalphase.com/products/usb-power-delivery-analyzer/ 

    Could you please provide us with the USB-PD trace log? This would let us know exactly how the TPS25750 and PD adapter are interacting and why a 15V contract is being entered.

    Thank you,
    Eric

  • Hi Eric-san,

     

    It is verified by our customer.

    I will check if our customer has any analyzer.

     

    Bye the way, is there a problem with their GUI settings?

    *For example;

     -60W is better than 100W

     

     -[New PDO setting] is better than [Now Sink PDO setting] etc.

      

     [Now sink PDO setting]

    Sink PDO1 15W (5V*3A)

    Sink PDO2 27W (9V*3A)

    Sink PDO3 45W (20V*2.25A)

     Sink PDO4  60W(20V*3A)

     

      [New sink PDO setting]

    Sink PDO1 15W (5V*3A)

    Sink PDO2 27W (9V*3A)

    Sink PDO3 45W (15V*3A)

      Sink PDO4  60W(20V*2.25A)

     

    Regards,

    Hide

  • Hi Hide,

    What is the highest voltage the 45W PD adapter can source and can you check and see if it is able to supply 20V/2.25A? Their configuration looks correct, does the customer prefer the New sink PDO settings or the Now version? 

    Regards,

    Raymond Lin

  • Hi Raymond-san,

     

    Thank you for your prompt reply and check.

    Currently, their setting is [Now sink PDO setting].

    I understand that this setting is fine.

    By the way, [New sink PDO setting] was the example I thought of.

    So, they use [Now sink PDO setting].

     

    And, they have reported that it is 45W PD adapter is able to supply 20V/2.25A.

    However, I will check again.

     

    Regards,

    Hide

  • Hi Hide,

    To clarify, the customer wants the Now sink PDO settings (Sink PDO4 as 60W, 20V/2.25A)? From what I can see, their configuration looks correct. It will be beneficial if we can obtain a PD log to see why it's taking in 15V/3A instead. While you're checking the PD adapter specs, can you also check the other sink PDOs (outside of PDO 1-4) and see if one of them is set to 15V/3A? 

    Regards,

    Raymond Lin

  • Hi Raymond-san,

     

    The customer wants the Now sink PDO settings (Sink PDO4 as 60W, 20V/2.25A)?

    -> your reasoning is correct.

     

    Other sink PDOs (outside of PDO 1-4) and see if one of them is set to 15V/3A?

    ->they don’t set 15V/3A to sink PDOs

     

    They will continue to evaluate.

    I will contact you again after I get new information.

     

    Regards,

    Hide

  • Hi Hide,

    Thank you for the clarification. I'll see if I can find any relevant information regarding this case.

    Regards,

    Raymond Lin

  • Hi Raymond-san,

     

    They can’t confirm USB-PD trace log of your image at combination of 45W adapter and EVM.

    However, I got new information

     

    -----

    <Infromation1>

    They confirm 45W adapter by AVHzY CT-3.

    At the result, adapter supports USB PD3.0 and the following settings PDO.

    1 FIX 5.0V/3A

    2 FIX 9V/3A

    3 FIX 12V/3A

    4 FIX 15V/3A

    5 FIX 20V/2.25A

     

    <Information2>

    From the following results, 45W adapter is judged to be normal and can output 20V/2.25A.

    -Combination of 45W adapter and EVM                                : VBUS=15V (incorrect operation)

    - Combination of 45W adapter and their fixture board(can support 100W) : VUBS=20V (correct operation)

     -----

    Is it possible to suggest a workaround from this information?

    I’d greatly appreciate your verification.

     

    Regards,

    Hide

  • Hi Hide,

    It might be a possibility that the EVM board has limitation to it that prevents it from supporting 2.25A. Can you obtain a PD log when this happen while I try to recreate this with the EVM I have on hand?

    Regards,
    Raymond Lin

  • Hi Raymond-san,

     

    I understand that USB-PD-CHG-EVM-01 can support 100W sinking so can support 20V/2.25A sink.

    However, according to your comment, USB-PD-CHG-EVM-01 can’t support 20V/2.25A.

    Is my understanding correct?

    If yes, could you please let us know this reason and any workaround?

    And, I understand that PD log is the following image.

    Is my understanding correct?

     

    <PD log image>

    Regards,

    Hide

  • Hi Hide,

    Apologies for any confusion, let me rephrase. The EVM itself has the capability to sink up to 100W (20V/5A) but can only source 45W. 

    In the PD log you provided, it seems like the sink (EVM) is requesting 3A/75W (225W). Is there a sink PDO configured to this?

    Regards,

    Raymond Lin

  • Hi Raymond-san,

    I understand that sink up to 100W (20V/5A).

    And, sorry for confusing you.

    This PD log is other image informaiton.

    So, I will confirm with the customer from now on.

    *I wanted to confirm with you the content of the confirmation to the customer.

    Could you please let us know if you need any other information?

    Regards,

    Hide

  • Hi Hide,

    To clarify the issue, customer wants the EVM to sink 20V/2.25 from the PD capable charger, however it constantly negotiates the 15V/3A instead, is that correct? In the PD log image you sent, it looks like the sink (EVM) is requesting 3A/75W. Check with the customer again and see if they configured the sink PDOs correctly. 

    Regards,

    Raymond Lin

  • Hi Raymond-san,

    <PD log image> is infromaton of TPS65987x, TPS65988x Power and Data Role Swaps.

    This is provided to confirm the information (image) you need.

    (sorry for confusing you.)

    We confirm the actual evaluation result.

    I will contact you again after I get new information.

    Regards,

    Hide

  • Hi Hide,

    Thanks for the clarification, looking forward to hearing from you.

    Regards,

    Raymond Lin

  • Hi Raymond-san,

     

    I got PD log from our customer.

    Please refer to NG case(PD adapter to EVM) and OK case(PD adapter to their PC).

     

    NG case.15V/3A is set.

    Their hope is 20V/2.25A.

    Could please let us know this cause and workaround?

     

    OK case. 20V/2.25A is set.

    So, 45W adapter can support 20V/2.25A.

    Therefore, we guess that EVM has cause.

     

    [NG case(45W adapter to EVM)]

     

    [OK case(45W adapter to their PC)]

     

     

    Regards,

    Hide

  • Hi Hide-san,

    Is it possible for you to send the PD logs file directly to me? 

    Thanks and Regards,

    Raymond Lin

  • Hi Raymond-san,

    Plerase refer to the attachid files.

    I kindly ask for your ongoing support.

    Regards,

    Hide

    NG case(45W adapter to EVM).usb

    OK case(45W adapter to their PC).usb

  • Hi Hide-san,

    Thanks for providing the files. 

    Just want to make sure, between the NG and OK case, the only thing that changes is the sink device (PC vs EVM)? I want to make sure there's no other potential deviants (i.e. different cables, charger etc.). 

    Can you also send me your binary file(s) for this project?

    Thanks and Regards,

    Raymond Lin

  • Hi Raymond-san,

     

    The change is Sink device only.

    And, PC is commercial product so our customer can’t confirm internal circuit (PD controller and charger etc.).

    (By the way, PC is dynabook G83/HS PORTEGE X30L-J Series)

    The reason I shared "OK case" is to report that 45W adapter works fine.

     

    I would like to post “.bin file” but I can’t attached .bin file.

    Therefore, I sent Zip file and friendship request.

    If you can't confirm .bin file in Zip file, could you please let us know your mail address?

    I’d greatly appreciate your verification.

     

    And, can you reproduce this phenomenon?

    Would you tell me about the progress on this matter?

     20220830_5PDO.zip

    Regards,

    Hide

  • Hi Hide-san,

    I sent an update on one of your other threads regarding this case. 

    Will provide update once I test it out. 

    Thanks and Regards,

    Raymond Lin

  • Hi Raymond-san,

    Thank you for your response.

    I kindly ask for your ongoing support.

    Regards,

    Hide

  • Hi Hide-san,

    Thank you for your patience, I'm currently still working on resolving this. 

    Can you provide the JSON settings file (export from the Applications Customization Tool) so I can double check with your settings?

    Thanks and Regards,

    Raymond Lin

  • Hi Raymond-san,

    Please refer to the attachid JSON file in Zip file.

    8713.20220830_5PDO.zip

    Regards,

    Hide

  • Hi Hide-san,

    Thank you for providing the JSON file, I'll provide a fixed binary by Friday.

    Best Regards,

    Raymond Lin

  • Hi Raymond-san,

    I kindly ask for your ongoing support.

    Regards,

    Hide

  • Hi Hide-san,

    Still working on your case, thank you for your patience!

    Thanks and Regards,

    Raymond Lin

  • Hi Raymond-san,

    Thank you for always kind support.

    I would be grateful if you could reply as soon as possible.

    Regards,

    Hide

  • Hi Hide-san,

    Please try the attached bin file and see if it shows correct behavior.

    Thanks and Regards,

    Raymond Lin

    8713_ff_fixed_bin.bin

  • Hi Raymond-san,

     

    Thank you for your response.

    I have verified that your bin file works fine.

     

    And, I have three questions.

     

    -------

    [Q1]

    What did you modify in the file?

    So, we would like to know the cause of the abnormal.

     

    [Q2]

    We use ver7.0.3 but we have observed behavioral anomalies.

    Is “Application_Customization_Tool ver7.0.3” normal?

     

    [Q3]

    If we generate a new configuration(bin file), should I request the creation of the bin file?

    -------

     

    Regards,

    Hide

  • Hi Hide-san,

    1. I edited the hex file to configure the I2C events corrects, however this is a difficult process and I do not recommend following this method. 

    2. There is a bug within GUI v7.0.3 that causes the PD controller to set up I2C communication incorrectly with the BQ25792. 

    3. We're currently working on a GUI update for v7.0.4 that will resolve this issue. 

    Thanks and Regards,

    Raymond Lin