THS3491RGTEVM: Powering issue with the evb. It seems the evb has a short circuit.

I bought THS3491RGTEVM 1pcs from Digi-Key.

- (31T)Lot : 4016436KRY, LBL-32A  (L)TO:1185

If possibe I want to exchange.

Please check it for me.

Hi Han,

Can you describe exactly what occurred when turning on the EVM? Was anything altered in the EVM? We test every EVM before it leaves the manufacturer to ensure the EVM functions as expected. Is there a chance the VCC and VEE supplies were accidentally flipped?

Best Regards,

Ignacio

Thank you so much for taking care about our inquiry.

We connected EVM VEE, VCC, GND to DC power supply and slowly increased.

The current limitation was activated and the voltage was suppressed in very low value (probably less than 0.2V).

Nothing was changed in EVM at all.

We did absolutory the same procedure to two EVM for testing continuously. So the setting of power supply, connection etc are all the same, and so, at least, I believe I did not flip VEE, VCC.

Best regards,

Dear Ignacio,

Thank you for your reply.

>>Also, I saw you mentioned you have two EVMs, do you see the same issue on both?

-- No. We only have an issue in one EVM and the other one is working properly. I guess I sent a photo which applys 15V to working device.

>>Could you share what the current limit is set at for the supplies?

--About current limit, we were not sure about the actual current limit value. However, in my understanding, since the working EVM does not reach to current limit even 15V is applied and the other does reach to current limit under very biginning, it is very clear that the one is shorted.

Best regards,

Hi Han,

Understood, thank you for clarifying this with us. I attached a link below for information on customer returns. Considering the failure, reporting this with customer quality and filling out a return request would be best. 

Customer returns | Additional information | TI.com

Best Regards,

Ignacio