TPS2513A-Q1: Unexpected Output

Nathan Wille

Part Number: TPS2513A-Q1
Other Parts Discussed in Thread: TPS2513

I have been working with the TPS2513 to provide data signatures to a charging-only USB port. The chip has been working normally and providing the correct signatures for charging. However, recently, I have not been able to charge a device connected to my USB port. I checked the signatures the TPS2513 was providing, and I found that it was setting both the D+ and D- pins to 4.5V. I looked through the TPS2513 datasheet, and I don't believe this is an expected output for the device. Do these unexpected data signatures mean that my TPS2513 device is broken? Although I do not think I ever exceeded the 7V limit on the input pin, I have been operating above the recommended 4.5 - 5.5V range for the device.

over 4 years ago

0 Michael Tan over 4 years ago

TI__Expert 8420 points

Hi,

Which model you have test with the TPS2513 ? The DP and DM voltage may pull up by the charge device. The TPS2513 will never put 4.5V in the DP and DM pin. You can use other different charge device to verify the TPS2513 is work normal or not ,thanks!

0 Nathan Wille over 4 years ago in reply to Michael Tan

Prodigy 110 points

By charge device, do you mean the device I am charging?

You also mentioned that that the TPS2513 will never put 4.5V in the DP and DM pin. However, this is the behavior I observed and measured. Do you mean to say that a properly functioning TPS2513 will never do this? I am simply trying to diagnose whether this chip is broken or not.

0 Michael Tan over 4 years ago in reply to Nathan Wille

TI__Expert 8420 points

Hi Wille,

The TPS2513 will not set the voltage higher than 2.7V , I believe this 4.5V is pull up by the phone . You can use Apple phone to double confirm , If you find the DP/DM voltage come back to 2.7V that mean the device haven't been broken.

0 Nathan Wille over 4 years ago in reply to Michael Tan

Prodigy 110 points

Michael,

Is there a way to prevent this pull by the phone? Would this pull be caused by providing too much voltage either to the TPS2513 or the USB port? Should I implement a protection circuit to prevent the phone from pulling extra voltage?

0 Michael Tan over 4 years ago in reply to Nathan Wille

TI__Expert 8420 points

Hi Wille,I

The DP/M pin ABS max value is 5.8V , so even you find 4.5V in these pin the device should not be damage .

We need to identify which model you use for this test ? Is that Iphone ,samsung or Huwei ? If possible could you send the waveform for analysis?

0 Michael Tan over 4 years ago in reply to Michael Tan

TI__Expert 8420 points

Hi Wille,

Have you solve your issue ?

0 Nathan Wille over 4 years ago in reply to Michael Tan

Prodigy 110 points

Michael,

My apologies, I did not notice your last reply. I have been testing with both iPhone 6 and iPhone 10, and am getting the same 4.5V output onto the data lines with both phones. I do not currently have access to the waveform, but generally speaking, the Vcc waveform is a 5.5V DC line at a current of about 0.8 A. The waveform onto the data lines has no measurable current and is a 4.5V DC line.

Thank you.

0 Michael Tan over 4 years ago in reply to Nathan Wille

TI__Expert 8420 points

Hi Wille,

Could you replace with the new device and check DP/M still stay at 4.5V ?

I suspect the TPS2513 be broken in your test, thanks!

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TPS2513A-Q1: Unexpected Output