Part Number: TPS54540-Q1 Other Parts Discussed in Thread: TPS54540B-Q1 , LM5166 , Tool/software: WEBENCH® Design Tools In the final design with TPS54540B-Q1, if you click it , it goes into LM5166.
Part Number: TPS54560B Other Parts Discussed in Thread: TPS54560 , TPS54340B , TPS54340 , TPS54540 , TPS54540B Hi team,
I would like to know the all differences of B version.
TPS54560 vs. TPS54560B
TPS54340 vs. TPS54340B
TPS54540 vs. TPS54540B
Also please tell…
Hello Armin,
The TPS54540-Q1 is more sensitive to noise than the TPS54540B-Q1. Since the part is not shutting down due to heat, noise is the most likely problem. Three approaches to reducing noise sensitivity are:
1) Use the TPS54540B-Q1.
2) …
Hi Sam,
The 0.1uF cap super close to the chip does help a little bit with noise, but doesn't fix the problem.
I will have a look out for the TPS54540B and see if this fixes the problem.
Thanks for your advice
Hi Gokhan,
The TPS54540 is not recommended for new designs.
I am reviewing your schematic now, but I believe that may be related to your load regulation issue.
Are you able to get a TPS54540B or a different IC?
-Orlando
Hello Vito,
The large input loop – see figure below – combined with the parasitic inductance of the diode is causing a noisy switching waveform. This can be seen by undershoot when the switch node falls in the waveforms that you provided. …
