Hi Chase,
please always drop a note in the thread - otherwise you might not get a reply for days or weeks as private message gets not checked regularly and can not be accessed by the whole apps team.
- The slope compensation capacitor is much higher…
Hi Terho,
thank you for using the E2E forum.
Can you share the schematic?
Can you use the quickstart calculator
https://www.ti.com/tool/download/LM5175QUICKSTART-CALC
enter your design data and share the file here again.
What is your softstart…
Hi Zhang,
thank you for using the E2E forum.
Can you please fill out the quickstart calculator which can be found on the product page with your design data and attach it here as well.
https://www.ti.com/tool/LM5175QUICKSTART-CALC
Best regards…
Hi Patrick,
Thank you for using E2E forums, could you please use this excel sheet https://www.ti.com/tool/LM5175QUICKSTART-CALC for your design instead of Webench? Regarding the 3.3V input, the device has minimum Vin as 3.5V, maybe you could have…
Hello Humphrey,
For testing I would remove first the 10 ohm gate resistors and replace them with 0 ohm.
At the first glance, the schematic seems to be ok, but I did not find the time to fill in the quickstart calculator today: Here you can find it…
Hello Adithya,
Thanks for reaching out to us via e2e.
Fundamentally the schematic looks good. I would definitely recommend adding footprints for gate resistors, so that they can be added, if necessary.
I could not spend time to calculate all components…
Hello,
Thanks for your message. Has this design already been check with the Excel Quick Start calculator ( https://www.ti.com/tool/LM5175QUICKSTART-CALC )? Could you please share the scope shots of the CS/CSG pin, SS pin and the two switch nodes? Do…
Hi Max,
thank you for using the E2E forum.
Can you please fill out the Quick start calculation tool which can be found on the product page:
LM5175 data sheet, product information and support | TI.com
https://www.ti.com/tool/LM5175QUICKSTART-CALC…
Hi David,
thank you for using the E2E forum.
I also agree this jitter looks too high.
If your output voltage is stable, can you please check if you have used the right slope compensation.
A good tool for checking this is the
LM5175QUICKSTART…
Hi Vasu,
Some comments to the schematic:
Rsense is really small - is there a reason for that?
Slope capacitance is too big
Phase Margin is also very low.
Please use the quickstart calculator (found on the product page) - to check the design…
