• State TI Thinks Resolved
  • Locked Locked
  • Replies 12 replies
  • Answers 2 answers
  • Subscribers 52 subscribers
  • Views 1666 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.

Current consumption for CC2564 in full DC2DC power scheme (VDD_IN = 1.8V)

Miles Cernauskas
Prodigy 230 points
Other Parts Discussed in Thread: CC2564

Hello, 

My customer would like to use the CC2564 in the full DC2DC power scheme with VDD_IN = 1.8V. Current consumption for EDR full throughput is listed at 41.2mA for VDD_IN = 3.6V, can you please provide this value for VDD_IN = 1.8V?

Thanks,

Miles

  • 0
    TI__Prodigy 230 points
    UPDATE:
    It turns out my customer was looking at an old version of the datasheet (last updated October 2013). In that version of the datasheet the full DC2DC power scheme is described in detail to optimize for power consumption instead of output power. This does not show up anywhere in the new version of the datasheet on the TI website (updated January 2014).

    Is the full DC2DC power scheme still supported on the CC2564? If so, where can I find documentation on it? What will be the power consumption for full throughput at VDD_IN = 1.8V?

    Thanks,
    Miles
  • 0 in reply to Miles Cernauskas
    TI__Mastermind 23565 points

    Miles,

    DC2DC mode is supported in the WSP package. The latest DS is from October 2013.

    Regarding the current consumption, we don't have such number unfortunately and they will have to be collected by the customer depending their specific DC2DC device.

    Regards,

    ~Miguel

  • 0 in reply to Miguel
    TI__Prodigy 230 points

    Ok, I'm a little confused. The DS on the website and on ESP is SWRS121D, revised January 2014. Another DS my customer is using is SWRS098D, revised October 2013. These datasheets have conflicting information on the VDD_IN range, and SWRS121D makes no mention of the full DC2DC power scheme. Should I have him continue to use the October 2013 datasheet? Can we get the proper datasheet up on the website?

    Thanks,

    Miles

  • 0 in reply to Miles Cernauskas
    TI__Mastermind 23565 points

    Hi Miles,

     I should have explained better in my previous response. The SWRS121D Ds is for the QFN package and the SWRS098D is for the WSP package. There are some differences between the two of them as you have already noticed. Given that the WSP package is only provided under NDA, the DS is not available to the public.

    I recommend using the corresponding DS. BTW, we will have an update QFN and DS in September which includes some minor updates.

    ~Miguel

  • 0 in reply to Miguel
    TI__Prodigy 230 points
    Hi Miguel,

    Thanks for the explanation, that makes sense. For the current consumption in full DC2DC mode can we provide an estimate at VDD_IN = 1.8V? It doesn't have to be an exact number but they are asking for some guidance on the delta from running at 3.6V. If not can you provide some instructions on how to test this?

    Thanks,
    Miles
  • 0 in reply to Miles Cernauskas
    TI__Mastermind 23565 points

    Miles,

    The current  consumption will depend on the external DC2DC that is used. Do you have some specific scenarios that you are looking for? I can check if we have some numbers for the scenarios that you are interested in.

    ~Miguel

  • 0 in reply to Miguel
    TI__Prodigy 230 points
    Hi Miguel,

    I understand that the current consumption will depend on other factors, but the customer is just looking for a ballpark estimate. Can you use the same scenario for the 3.6V calculation, but with 1.8V instead?

    Thanks,
    Miles
  • 0 in reply to Miles Cernauskas
    TI__Mastermind 23565 points

    Miles,

    Here are some numbers:

    Test Setup
    Power Supply VIN = 3.3V
    Fast Clock: 26MHz XTAL
    Temperature: Room Temp
    For DC2DC Mode: TPS62080
    Measurement Period: 2 minutes
    BT Scanning - Discoverable and Connectable
    Mode Conditions
    Generic Specific
    Scan Interval Power
    Mode    		 Average Current
    Inquiry Scan Scan Window = 11.25ms 1.28s DC2DC 251uA
    2.56s DC2DC 162uA
    Page Scan Scan Window = 11.25ms 1.28s DC2DC 251uA
    2.56s DC2DC 164uA
    Inquiry and Page Scan Scan Window = 11.25ms 1.28s & 1.28s DC2DC 419uA
    2.56s & 2.56s DC2DC 248uA
     1.28s & 2.56s DC2DC 333uA

    Miguel

  • 0 in reply to Miguel
    TI__Prodigy 230 points
    Miguel,

    This is still for VIN = 3.3V, do we have any data for VIN = 1.8V?
  • 0 in reply to Miles Cernauskas
    TI__Mastermind 23565 points

    Miles,

    The idea of the DC2DC mode is that the internal LDO is by-passed and an external DC2DC device is used with better efficiency. Thus, better power consumption. The numbers are given at 3.3V to be able to compare apple-to-apples against the VBAT mode. Note that the current consumption is measured at the DC2DC input.

    ~Miguel

  • 0 in reply to Miguel
    TI__Expert 3120 points
    Hi Miguel,

    Unfortunately, the Intel engineer is pushing hard for the current consumption separated at CL1.5_LDO_IN and MLDO_IN? Is this data available?

    Thanks,
    Robb
  • 0 in reply to Robb S
    TI__Mastermind 23565 points

    Robb,

    We don't have this data. At this point, I think it would be better for the customer to measure their specific use cases. This way, they can get concrete numbers for their application.

    Regards,

    ~Miguel