I've been trying to understand how to select an adequate inductor for a boost converter circuit. I'm a hobbyist so I'm not always sure what to look for, so I haven't been able to find something that helps me understand holistically wether or not an inductor is adequate for a given step-up DC/DC converter circuit.
My question is what are the relevant specifications for an inductor, how does changing each one impact it's capability in the converter circuit, and how do you figure out what makes the inductor inadequate?
The inductance seems to "set" the ripple current. The higher the inductance, the lower the ripple current. This appears to be desirable. If the datasheet recommends a 1uH inductor, can I substitute a 2uH inductor? What about 470uH? How do I know how much ripple current is acceptable?
Maximum DC Current
The DC current rating seems like it's related to how much current I can draw on the supply side. If I think I'm going to pull 3A from the power supply, can I use any inductor, ceteris paribus, with a maximum DC current greater than 3A (plus some amount of derating)?
Maximum DC Resistance
The maximum DC resistance seems like smaller is better, but how do I know how high the DCR can be before it negatively impacts the converter circuit or battery life?
Self Resonant Frequency
The self resonant frequency has to be greater than the frequency of my switching circuit right? But, can I pick just about SRF that's greater than the switching frequency (plus some margin)?
Are there other factors that impact the inductor selection that I didn't consider (other than price and footprint . . . which is why I'm asking the question in the first place)?