i have been working on making a boost converter circuit to incorporate into my PCB and have ordered these inductors. I believe i have tracked down the datasheet(difficult with these cheap chinese parts) and it looks like the max dc current is 1A which is fine for me. i just wanted to ask if i was correct in my judgement as i am not completely confident and dont want to use an inductor which cant handle the current. thanks!
1A through such a small inductor might be just below its saturation point but that might not be enough.
I mean: even if these inductors can handle up to 1 A that will not be enough to use in a 1 A output current boost converter.
In all DCDC converters the inductor must be able to handle a higher current than the required output current. That is because the average current through the inductor is the same as the output current but the peak current can be much higher.
In a boost converter the peak current during the charging phase of the coil can be quite high, in some circumstances (low input voltage and high output voltage) much higher than the output current.
Note that when an inductor saturates it will behave like a very low value resistor. In some cases where there is no overcurrent protection, this can damage the switching transistor.