Hello,
I am running some tests on a 5031/4232 PD combination. The “power supply” runs more or less fine, but I encounter an issue with the transition from Boost mode to Buck mode. I find the Vout/Vin differential way to large, but maybe I am missing something.
The board is powered by a 19V PSU and I have measured the input voltage at the Vin pin of the 4232 with my scoop and it reads 18.1Vmin and 18.4Vmax at full load. The Fs = 600Khz.
At full load (15V-2.6A) the 4232 runs perfectly fine in Buck mode. When the output voltage is increased to 15.3V, then the unit starts to run in Boost mode. To make the transition to Buck mode again, the output voltage needs to be decreased to somewhere between 12 – 14V, even without a load.
Is this normal behavior and do I mis reed the spec sheet? Is there an option available in the config to optimize this setting?