the extra current consumed is probably because the breadboard. at 1.2Mhz every node starts to oscillate. board layout plays a very important role in switching converters efficiency. I have learned this in a very hard way when designing buck-boost converter with lm5175, all my traces were fat and short but the board didnt work because of the bad layout.
That's some nice driver - could be perfect for a bike tail light with a supercap to keep it lit during short stops, and possibly supporting different working modes (brighter, darker, blinking etc.).
There's so much to learn from these "Chip of the day" videos! Really enjoy these short videos on useful chips, thank you!
the extra current consumed is probably because the breadboard. at 1.2Mhz every node starts to oscillate. board layout plays a very important role in switching converters efficiency. I have learned this in a very hard way when designing buck-boost converter with lm5175, all my traces were fat and short but the board didnt work because of the bad layout.
Yes, not to mention the approx 2pF between each row and 20pF between rails. I keep well away from breadboards for anything over 100kHz.
That's some nice driver - could be perfect for a bike tail light with a supercap to keep it lit during short stops, and possibly supporting different working modes (brighter, darker, blinking etc.).
8:36 It's a fixed 1.2Mhz converter, IMO your THT layout plays the biggest role in such efficiency figures.
I wonder what sort of harmonics that 1.2 MHz generates on a spectrum analyzer. The oscilloscope trace is um, yes, interesting.
Should have verified the output current through the LEDs. Could have been more than the calculated 15mA
You must have a vast supply of ... unusual components.
Handy little IC.
Thank you