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Looks like something is shutting down when the 3.3V channel is enabled. Can you verify that the 12V input supply is not hitting current limit and that VCC is steady at 5V.
Can you please complete the quickstart file here: https://www.ti.com/tool/LM5140ADESIGN…
Part Number: LM5140ADESIGN-CALC Other Parts Discussed in Thread: LM5143-Q1 , LM5140-Q1 Hi Experts,
the LM5140ADESIGN-CALC seem to always recommend the same FET. Even when Vin is exceeding the max voltage of the IPC50N04. Is there an issue or is this part…
Part Number: LM5140ADESIGN-CALC Hi Team,
When trying to modify the "inductor DCR" box, Excel prompted me to enter a password.
Could you provide me with the password?
Thanks!
Roy Hsu
Hi,
You may be able to use the design calculator listed below.
It gives you an approximation based on the component selection that you use
https://www.ti.com/tool/LM5140ADESIGN-CALC
Thanks
-Arief
Hi,
What are your input voltage and target working conditions? Please use the below quick start tool with your inputs. For output voltage ripple I still recommend to use simulator because it's related to the actual output capacitance.
www.ti.com/.…
Part Number: LM5140-Q1 Other Parts Discussed in Thread: LM5140ADESIGN-CALC , LM5143-Q1 , Hi Team,
1. When using this device in the interleaved mode, how do I calculate Rcomp and Ccomp?
Cout - Should I use the total capacitance on both phases?
Rsense, RDCR…
Hi Zhi,
These EPC FETs are sensitive to gate overvoltage. I recommend putting a 5.1V Zener across each boot cap. Also, you will likely need an antiparallel Schottky from GND to SW of each channel as the GaN FET does not have a body diode (causing the…
Part Number: LM5140-Q1 Other Parts Discussed in Thread: LM5140ADESIGN-CALC , LM25119-5119QUICK-CALC Dear, Sir.
My custonmer is interested in LM5140-Q1 to realize the interleaved current share to increase
the oiutput current.
Accoring other thread on this…
Part Number: LM5140-Q1 Other Parts Discussed in Thread: LM5140ADESIGN-CALC , Hello,
The power loss calculation of MOSFET in LM5140ADESIGN-CALC.xlsx do not match with the result from datasheet equation. Both high side mosfet switching loss and low side mosfet…
