JAJSFQ6E March 2014 – July 2018 TPS92601-Q1 , TPS92602-Q1
UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
The peak-to-peak ripple is limited to 30% of the maximum output current.
Estimate the minimum inductor size using Equation 18.
Select the nearest standard inductor value of 22 µH. Estimate the ripple current using Equation 19.
The worst-case peak-to-peak ripple current occurs at 47.5% duty cycle and is estimated as 0.575 A. Equation 21 estimates the worst-case rms current through the inductor.
The worst-case rms inductor current is 5.08 A rms. Equation 22 estimates the peak inductor current.
Select a 22-µH inductor with a minimum rms current rating of 5.08 A and minimum saturation current rating of 5.26 A. The selection is a Wurth 74435572200 inductor (shielded-drum core, ferrite, 22 µH, 11 A, 0.0146 Ω, SMD).
Equation 23 estimates the power dissipation of this inductor
The Wurth 74435572200 inductor with 14.6-mΩ DCR dissipates 404 mW of power.