Hi,
I am designing a project that uses a TPS54232 to convert a 12V to 24V input to 5V output
My circuit(first image) was based on a TI SwitchPro circuit.
The problem is that TPS54232 is not handling voltages over 15V. I have destroyed 3 ICs by now.
At first I thought it was due to an input voltage spike coming out of my bench power supply.
However, I tried increasing my input voltage gradually, starting at 12V, while keeping an eye on the IC output.
Up to 14V the converter worked fine but when the input reached 15V the IC died (This happened twice!).
Maybe the problem is in my PCB design, but I am not sure where I went wrong. (see image below)
(OBS1: I omitted the ground plane to make it easier to see.)
(OBS2: Q1, and R1 are not populated. J1 is a jumper linking the input to TPS)
Is there something I am missing? The TPS54232 should work with Inputs going from 3.5V to 28V,
and circuit is exactly like the one I got from SwitchPro Desktop.
I am pretty sure I made some silly mistake here, I just cannot see where.