Tool/software: WEBENCH® Design Tools
based on webench design, my Vin=28V, using LM25119 as an interleave/single output, per recommended schematic, Vout is expected to be 24V, Iout=19A (9.5A each channel). However, upon power up Vout=1.2V. With selected Rt, the switching frequency is about 172Khz. I can see this switching waveform on scope.
Can anyone points me to where to start troubling shooting?