WEBENCH® Tools/LM5175: LM5175PWPR

Hi Nidhi,

Could you please attach the image again. We are not able to see the attachment.

Thanks & Regards,
Praveen

Hello Nidhi,

What issues do you face?

My IC is heating up at no load condition and the output voltage is 3-7 V

Hello Nidhi,

From the first glance on the schematic, I cannot see anything obviously wrong. It is hard to read the values, so could you please send a higher resolution picture?

Please check if all components are soldered properly and correct, sometimes diodes or electrolytic caps are easily reversed.

Hello Brigette,

I am attaching a PDF of my schematic. test1.pdf

While designing the PCB I was in constant communication using this thread.

https://e2e.ti.com/support/tools/sim-hw-system-design/f/234/p/907313/3356964#3356964

Hello Nidhi,

Please check the input and output voltage, as well as the inductor current. It is possible that instability in voltage or current causes the excessive heat.

The change in output changes linearly with input

Can you let me know if components values are correct

Hello Nidhi,

What input voltage range do you have in your system and what is the maximum output current? BTW, for 100kHz, the inductor value is very small. You might increase it to 10uH or 15uH. Or you reduce the value of the RT resistor to increase the switching frequency.

Hello, 

Input voltage ranging from 24V to 30V. Maximum output current is 16A.
We tested it and it only works when the input voltage is 26V. 

Hello Harshith,

Please check what happens when you reduce the sense resistor to 6 or 7 mohm instead of the used 10 mohm. For 16A output current, 10 mohm are too big.

Hello, 

we will test it let you know the result. 

I wonder why the output voltage is not stable to 24V, after the load with min current consumption is connected. Even after the Feedback resister is fixed for 24V. Can you help us with this issue

Hello Harshith,

Did you check with a different inductor value, see above?