Other Parts Discussed in Thread: LM5176
Hello,
my problem is that the boost highside synchro only works sometimes.
There is no influence of mode, boost 18 to 25V or buck 25 to 18V, temperature, current 0…6A.
But often it works in the whole range if the input voltage is reduced to 6V before.
How is the inductor current drop to zero for the disabeling of the synchros detected?
What could be the reason?
The layout is nearly the same as in your EVM SNVU440.
The 8V2 zener diodes are integrated.
Thank you very much for your help
Best regards
Peter