Hey,
On the MSP432P401R launchpad, the inductor (L1) has two different part numbers. The one on the datasheet's schematic (LQM21PN4R7NGR) and the other one on the launchpad's Bill of Materials (LQH2MCN4R7M02L). I checked DigiKey's website and the differences were self resonant frequencies and current rating. My main question is just whether or not the self resonant frequencies of the two inductors is a main factor or are these both sort of interchangeable?
Thanks,
Nick Hellenbrand
Hi Nicholas!
You're right, there are different part numbers. The one that is used on the MSP-EXP432P401R LaunchPad (at least on the ones I got here) is the LQM21PN4R7NGRD. This is the part shown in the schematic - the BOM lists the other part which is not used.
For your reference:
The used one ia a multilayer ferrite in 0805 package, while the other part is a real coil with windings in a 0806 package. Both types look interchangeable, but the ferrite is the one that got assembled.
Dennis
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