Hi Robin,
thank you for supporting the LM5175.
Could you please attach the filled out LM5175QUICKSTART-CALC to this thread?
This will give the best overview on the application setup and requirement.
Can you also add some more details on the conditions: …
Depends on if you need two phases. If you only need one phase, then the LM5148 is an option (and this is stackable to two phases if needed).
Typically, we only need two phases if the output current exceeds 20-30A (depending on Vin-max, Fsw, max ambient…
Hi Neo,
I suspect the design is unstable - please complete the quickstart calculator to check https://www.ti.com/tool/LM5145DESIGN-CALC . Note the 22uF/25V output cap will be ~10uF at 8VDC. Set the crossover < 25kHz. what is the ESR of the electrolytic…
Parker,
Go ahead and fill out the quickstart calculator and I will review it for each design. See the apps circuit examples in the datasheet for reference. Btw, the LM5137-Q1 is online now.
https://www.ti.com/tool/LM5143DESIGN-CALC
Regards,
Tim
HI Naveen,
can you share all design parameters used for Webench.
You can also use the Quickstart Calculator:
https://www.ti.com/tool/download/LM5118QUICK-CALC
It allows you a better control and access to the parameters.
Best regards,
Stefan
Hi Hideyuki,
the result are close to the actual design as most of the parameters are considered.
You can also use the quickstart calculator which allows you to adjust more parameters.
LM5175QUICKSTART-CALC
Best regards,
Stefan
Hi Cho,
Thanks for using the e2e forum.
There is no physical resistance component with this exact value, so it makes sense to choose a resistance of 2mOhm or 3mOhm instead. The effect on the device itself is that the peak current limit is changed (The…
Hi David, please send the schematic and a completed quickstart calculator with FET part numbers.
https://www.ti.com/tool/LM5145DESIGN-CALC
Regards,
Tim
That FET has a very high Qrr of 111nC - try one with lower Qrr to improve the noise behavior, e.g. CSD18563Q5A.
See here for the quickstart: https://www.ti.com/tool/LM5145DESIGN-CALC
Thanks for the help, I've updated the EXCEL with the correct ESR, I'm using 4 10uF low ESR ceramic cap + 1 elec 470uF, with your excel it should be around 5m Ω so i used 10 for my calcs. Now the COMP values are really strange in the LM5149 excel…