Tool/software:
Dear TI
I am designing a circuit using a LM70880 with the following specifications.
Vin: 32 ~ 80V
Vin(nom): 48V
Vout: 24V
Iout(full load): 4A
After confirming that the provided simulation runs without a problem,
I tried to simulate 24Vout 4Aout using the values of the parameters found in quickstart_calculator Excel file.
I modified feedback resistors, Cboot, Lout, Rrt and Rs. I added a Rboot.
Rfb(h) 290k, Rfb(l)10k, Cboot 47n, Rs 8m, Rboot 1
When Fsw is 400KHz(Rrt 54.9k) and Lout is 22uH, it works without a problem.
However Fsw is 2.2MHz(Rrt 9.09k) and Lout is 4.7uH, a error occurs and the simulation stops
I would like to ask for advice.
