Tool/software:
In the data sheet, it has an example (paragraph 8.2.1.1) so I'm referring to pages 16 and 17 of the data sheet. The TI example states the inductor should calculate to 97uH (paragraph 8.2.1.2.2) but I get 143uH. Is the 97uH a typo or am I incorrect? Here are the values from example on pages 16 and 17.
Vinmax = 60V, Vout = 5V, Kind = 0.4, Io = 200mA, Fsw = 400KHz
I need to reconcile this since it’s one of the first of many equations that I need to confirm. Page 16 of the date sheet gives the below for their data sheet example: This is where I get Vout of 5V, Io of 200mA, and Vinmax of 60V. Even in a paragraph on page 17 it reiterates this maximum input voltage of 60V for this example. I get Kind = 0.4, and Fsw = 400KHz from these paragraphs on page 17.
From the above, here is how I calculate the Lomin (inductor min) from equation 8 in the data sheet:
L0min >= ( (60-5)/(0.4*0.2) ) x 5/(60*400,000) = 55/0.08 x 5/24M = 143uH
This data sheet was last revised November of 2015 so I suspect it is wright and I'm doing something wrong.
