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  • TI Thinks Resolved

TPS61310: TPS61310 ,Video light mode , continue current issue.

Part Number: TPS61310

Hi Sir,

I have a TPS61310 and trying to use LED2 in "video light" mode and output a current of 325 mA.  The datasheet shows it is supported by setting the Tx-Mask GPIO to 1.  I have attempted this many times and have verified the Tx-Mask Input is being set high.

The order of operations I am performing are:

1. set DCLC2[2:0] to 111

2. Set Tx-Mask high

3. Set Mode control to video light mode

The current being output is only 175 mA.

One other thing, the TI TPS61310 EVM GUI only shows the possible current values up to 175 mA, does this function actually work on this device?

Thanks.

  • Thank you for your interest in the TPS61310. Someone is looking into this and will respond within the next business day.

    Regards,
    Angelos Tsiros
  • In reply to Angelos Tsiros:

    sir,

    thank for you reply,but the schedule a little urgent..please kindly help us, thank for your great support.

  • In reply to Tommy Tzeng:

    Hi Tommy,

    Your register settings and pin configuration for output current of 325mA seem correct to me. I don't have the EVM handy to verify this on the bench. We ordered the EVMs and it might take a few days to receive the boards.

    Meanwhile, we have a few questions for you:

    1) Are you testing this on your system (or) on TI EVM?
    2) To set Tx-Mask high, what voltage are you pulling it to? Wondering if it is really high.

    Thank you,
    -Harini
  • In reply to Harini Sankabattula:

    Hi Sir,

    1) Are you testing this on your system (or) on TI EVM? on system

    2) To set Tx-Mask high, what voltage are you pulling it to? Wondering if it is really high.  Tx-Mask pin is 3.3V , I'm sure it's high.

       Please refer to the  schematic below.

  • In reply to Tommy Tzeng:

    Hi Sir,
    any updates......
  • In reply to Tommy Tzeng:

    Hi Harini'sir,
    there are any idea.........
  • In reply to Tommy Tzeng:

    Hi Tommy,

    I just received the EVMs. I'll look at it and let you know as soon as possible.

    Thank you,
    -Harini
  • In reply to Harini Sankabattula:

    Hi Tommy,

    In addition to Tx-MASK pin, there is a bit named Tx-MASK (Reg 0x03 Bit 0). Writing 1 to this bit and setting mode to flash makes the part flash at 325mA (for DCLC2<2:0>=7 and at 225mA for DCLC2<2:0>=6 irrespective of what flash current is set to.

    It seems the instructions are inadequate to set 325mA/225mA in Video mode.

    We inherited this part recently and are reaching out to our prior team. As soon as we know any further details, I’ll let you know.

    Best,
    -Harini
  • In reply to Harini Sankabattula:

    Dear Sir,

    ok,if have new update information,Please let us know,

  • In reply to Harini Sankabattula:

    Hi Harini,
    It's Billy from Bison Electronics.
    We use video mode and set Tx-MASK value as 1, but use our ISP tool to read Tx-MASK, it still shown 0.
    I wonder how we can active 325mA in video mode..

    Sorry, our customer is in hurry, please kindly help, thanks.

    Best,
    Billy

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