TPS560430-Q1: Ask for EVM bode plot result

Peter Xu

Expert 6070 points

Part Number: TPS560430-Q1

Tool/software:

Hi team,

I tested the bode plot on customer's board. It was strange.

I think it is because customer did not solder a wire on 50 ohm+. I had to link the test device to Vout pin.

Do you have a bode plot result of our EVM?

Input voltage: 12V

Output voltage: 5V

Output Current: 0.1A

Regards,

Peter

over 1 year ago

0 Rahil Ajani over 1 year ago

TI__Genius 9460 points

Hi Peter,

The bode plot does look weird. Your connection of the 50ohm injection resistor is correct - between R106 and Vout. Can check if the connection is correct and re-try? It's also possible the equipment you are using is not functioning correctly, can you check that as well?

I also noticed you have 2x the Cout as what is recommended. I don't think this is the cause but it might be worth a try testing with only half of the Cout on the board.

Regards,

Rahil

0 Peter Xu over 1 year ago in reply to Rahil Ajani

TI__Expert 6070 points

Hi Rahil,

I will try it later.

Did you test the EVM bode plot before?

Regards,

Peter

0 Rahil Ajani over 1 year ago in reply to Peter Xu

TI__Genius 9460 points

Hi Peter,

I do not have a EVM on me, I will have to order it.

Regards,

Rahil

Power management

Power management forum

TPS560430-Q1: Ask for EVM bode plot result