I am making a 5A LED driver using MP24830. The switching FET is getting quite hot. On checking the gate with a scope I am seeing Vgs maximum just over 5V. This is enough to turn on but Rds remains higher than desired and I suspect this is causing the heat. I have tried increasing the bootstrap capacitor (even up to 1uF) - no difference. I’ve tried a few FETs too - FDD86367 (original), TK65G10N1, even IRFS3607PbF with a higher Rds but lower Qc to see if it makes a difference to the gate voltage - but it doesn’t.
Can someone advise the Vdr (pin1) - Vsw (pin 14) expected? Or any other advice here?