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measure the electrical properties of an inductor

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spanker1

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Hi,
I am working on a NCL30160 Led driver from On Semiconductor. I was told by my boss who is a mechanical engineer to measure all the electrical measurments you could possibly get from the inductor we are using. He told me to use the oscilloscope too see the waveforms and record the values.

I measured the Iout.
I am driving the LED's at 24V input

Amplitude 200mV
Rms =10.87V
Freq.= 774.3 Mhz
pk-pk 5.361V
Cycle Rms = 11.23V

I don't understand a single thing from these values.
Can some one advice me on the kind of measurement should i do?.

Thanks

PS: Here is the data for the LED Driver
https://www.onsemi.com/pub_link/Collateral/NCL30160-D.PDF
 
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You need to measure current. THe inductor should be saturating. ( but just barely, too much and it becomes inefficient at max load.)

If you have a Hall Effect current probe great. Otherwise. insert a non-inductive power resistor than might create a 0.1V drop above ground and use single ended probes . e.g. the ground path of the NCL30160 chip.... etc.. without a schematic < I can only guess values and location of your readings.
Also run from a Lab power supply and record current overall and test with +/- tolerance voltages to see how current is regulated constant and efficiency.
 
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