Hi Figo,
Please attach a quickstart calculator for this design:
https://www.ti.com/tool/LM5143DESIGN-CALC
This is important for us to understand your required specifications.
-Orlando
Brandon,
Please attach the quickstart calculator for this.
https://www.ti.com/tool/LM5143DESIGN-CALC
I believe your compensation is not tuned for this design, especially with your lower switching frequency.
If you dont have enough phase margin, then the…
Part Number: LM25143-Q1 Other Parts Discussed in Thread: PMP31202 , LM5143DESIGN-CALC , LM5143 PMP31202-Schmatic.pdf
Hi TI team,
Good evening.
We have designed the buck converter using LM5143QRWGRQ1 IC with below specification
Input Voltage: 36V
Output Voltage…
Hi Jeremy,
Can you send a completed quickstart file as well so we can understand circuit conditions, component selection, power losses, etc. https://www.ti.com/tool/LM5143DESIGN-CALC
Regards,
Tim
Here is the link www.ti.com/tool/lm5143design-calc
I attached the latest version of the quickstart here. You can send me the completed quickstart and the WEBENCH design to review and compare.
LM(2)5143-Q1 quickstart design tool - revB1.xlsm
HiZhang,
This is a 100V FET with high Rdson and hih Qrr. If Vin-max is 48V, thenyou can use a 60V FET. This will give lower power loss. Take a look at TI's NexFET portfolio of 60V FETs. In partiicular, you can use the NexFET calculator tool here: …
Hi Amelie,
Please use the LM5143-Q1 quickstart calculator to assist with component selection for a 2-phase implementation:
https://www.ti.com/tool/LM5143DESIGN-CALC
Regards,
Tim
Hi,
I think LM5143-Q1 is OK in your application as you already achieved a higher current. For LM5143-Q1 you can use below calculation tool to design:
www.ti.com/.../LM5143DESIGN-CALC
Hi EAson,
Pls check your circuit design by LM5143 Calculator:
https://www.ti.com/tool/LM5143DESIGN-CALC
Pin2 & 29 COMP network should be designed according to actual Cout and ESR.
What's saturation current of L38 and L39? how about load current? seems…
Satoshi-san,
You can use the LM5143-Q1 quickstart calculator available here: https://www.ti.com/tool/LM5143DESIGN-CALC . 8A per output is feasible at 400kHz. Not sure what problem was encountered with WEBENCH, but I will check it with these design specs…
