DCA1000EVM capture card does not work, Draws over 2 Amperes

Hi,

Please give us some time to review this question.

Will get back to you by Thursday

thank you

Cesar

Hello,

This is not normal. AWR1642BOOST should be <200mA when it is idle and DCA1000 should be a few hundred mA when idle.

Has this board ever worked before? What is the rating of the power supply you are using with the DCA1000 and AWR1642BOOST?

Regards,

Adrian

Hi,
We worked on this board before and it does not ever draw this much current before. Before the last Tuesday, AWR1642BOOST idle current value was about 0.3 Ampere and DCA1000EVM current value was about 0.7 Ampere.

When we power up the system, DCA100EVM, just 5v LEd is on the rest of the LEDs are off (including failure LEDs).

We supply the power of both AWR1642BOOST and DCA1000 with a power supply that is used in our School's laboratory. We supplied each of the devices individually with a 5V 1.5Amps current limit.

When power is on the system, only AWR1642BOOST was connected to the computer, and the DCA1000EVM Supply-side is drawn at about 1.5 Amps and 3.8 V, and the power supply was turned on the short circuit warning LED.

We checked and changed all of the connection cables including the Ethernet cable, and check the old cables one by one for any short circuits or failure. According to the other cases in this forum, we increased the DCA1000EVM current limit from 1.5 Amperes to 2 Amperes, and the power supply is still turned on the same error LED on the DCA1000EVM side. Then, we read the supply voltage and current values of about 2 Amps and 3.9 V.

In addition, the power of the system was turned off between the date we took the last measurement and the Tuesday when we received the error and no person interacted with the radar. No error was encountered in the last measurement taken with the system.

What should we do next? What is the reason behind this issue?

Regards,
Mustafa

Hello Mustafa,

It sounds like some damage occurred somehow. Were you working in an ESD safe area?

Something in the power is shorted, which is causing a large current draw. You would need to please submit a customer return to get a new board once you have confirmed that you were working in an ESD safe workspace.

https://www.ti.com/support-quality/additional-information/customer-returns.html

Regards,

Adrian

Hello again;
My school bought these devices in November 2018 from a distributor. according to your advice, I'm trying to reach the distributor but I can not reach them anyway. What should I do to solve this issue?
Also, we work on the radar in our school's ESD-safe RF antenna laboratory, and there is no Electrostatic discharge condition that occurred during our measurements.
ı will follow up on your feedback, thanks a lot.
Regards,
Mustafa ARSLAN