How to choose boost energy storage inductor

How to calculate inductance of a boost converter?

The average input current IL(DC_MAX) of the inductor is calculated using Equation 1. Then the inductance can be calculated using Equation 2. It is suggested that the ∆IL(P-P) should be 20%~40% of IL(DC_MAX) [1-2]. VOUT: output voltage of the boost converter. IOUT(MAX): the maximum output current. VIN(TYP): typical input voltage.

Which inductor is best for a boost converter?

The inductor between 1.5-μH and 10-μH can be used in the application. The efficiency or the power loss of the boost converter is one important factor that determines which one is the best. For the same package, smaller inductor will have the smaller DCR, which mean smaller DC conducting loss.

How to calculate a boost converter?

Boost Converter Solution / ALPS Traditionally, the inductor value of a boost converter is selected through the inductor current ripple. The average input current IL(DC_MAX) of the inductor is calculated using Equation 1. Then the inductance can be calculated using Equation 2. It is suggested that the ∆IL(P-P) should be 20%~40% of IL(DC_MAX) [1-2].

How much energy does a buck boost inductor handle?

A Buck-Boost inductor has to handle all the energy coming toward it — 50 μJ as per Figure 5.4, corresponding to 50 W at a switching frequency of 1 MHz. Note: To be more precise for the general case of η≤1: the power converter has to handle P IN /f if we use the conservative model in Figure 5.1, but only P O /f if we use the optimistic model.

How do you choose the best inductor?

Therefore, the goal of highest efficiency is met by selecting an induc-tor that provides sufficient inductance to smooth out the ripple current while simultaneously minimizing losses. The inductor must pass the current without saturating the core or over-heating the winding.

What is the difference between a high and low inductor value?

The higher the inductor value, the higher is the maximum output current because of the reduced ripple current. The lower the inductor value, the smaller is the solution size. Note that the inductor must always have a higher current rating than the maximum current given in Equation 4 because the current increases with decreasing inductance.