Dear E2E Expert Team,
I have been using LM5007 design from last 6 years and has zero failure till date.
How ever recently have done changes in inductor design and changed inductor value 100uH/0.6A to 120uH/1A.
With 120uH,my buck design working and gives the output 11.65 for 49VDC input but coil gets heated nearly 45 Centigrade.
However if i switch ON/OFF the input voltage several time then LM5007 suddenly going in to shutdown mode or current limit mode and didnt get recoverd. During this condition output of converter is nearly 2 volt and its oscillating.
Convertor working fine with 100uH/0.6A coil and no problem observed till.
I want to know why LM5007 going in to shutdown mode or current limit mode for 120uH/1A.Please refer the below our regular convertor design for your reference.