Hello i am creating a circuit that uses the TPS63070 buck-boost converter. As i was looking at its sample circuit and application in the datasheet on page 18 (under Inductor Selection), i am given 4 suggested inductor values.
I dont really understand on how to use the formula given in order for me to determine what is suited for my use.
my applications is for this to control 2 motors that may draw 0.5A - 1A (variable speed) at 7.5v each.
here is my circuit. Also maybe for consideration is i made the circuit so that i may adjust the under voltage cutoff protection and the output voltage. Output voltage maybe adjusted by +- 0.75v during application and undervoltage maybe adjusted by +- 0.5v.
So of the recommended 4 inductors
- 1.2 μH Coilcraft, XFL4015-122ME 4.5 A / 18.8 mΩ - 1.5 μH Coilcraft, XFL4020-152ME 4.6 A / 14.4 mΩ - 1.0 μH Coilcraft, XFL4020-102ME 5.4 A / 10.8 mΩ - 1 μH Murata, 1277AS-H-1R0M 3.7 A / 45 mΩ
which one should i pick? and if you can tell me how did you compute for it, it would greatly help me in future endeavours. Thank you.