LT-1303-5 with new inductor

 

Based on some ideas in the eevblog forums, I replaced the TDK inductor I used in the first videos with a Sumida RCH-855np.  The sumida specifically says…

Applications
• Ideally used in Printers, LCD TV, DVD, Copy Machine, Mainboard of the compounding machines etc. as DC-DC Converter inductors.

Since the TDK data sheet was a bit ambiguous and stated it was for “Power lines” there was a theory that the TDK may have actually been a choke.  Turns out the results show pretty much the same performance.  I was unable to get above 67% efficiency.  I would really like to see someone do better with this chip on video.


I think my next step will be to but the Adafruit kit for the minty boost, which uses the LT1302 chip in its design.  I am curious to see the results on a professionally designed pcb with a similar chip.

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