Designing a 40W Flyback Converter for the Rehkittz Torch

This video covers the design and implementation of a 40W constant current flyback converter for driving a very beefy blue LED destined for the Rehkittz torch from the previous video. We go through component selection, power electronics circuit simulation in LTspice, and take a look at a finished schematic and PCB design. What happens when: 0:00 Introduction 0:24 What's there at the moment 4:18 Selecting an LED 11:59 Setting up the simulation in LTspice 16:41 Ensuring a representative LED model 17:37 Increasing switching frequency 18:27 Tweaking for efficiency 20:06 Shrinking the inductor 26:04 Shrinking the capacitors 29:37 Checking the MOSFET specs 31:21 Showing the BoM 31:45 Checking the gate drive 32:21 Checking the diode specs 32:47 Checking the microcontroller specs 34:08 Finding a better microcontroller 37:42 Current measurement circuitry 41:47 Confusion... (feat. troubleshooting) 43:46 Working current measurement 45:17 Going through the finished schematic 47:39 Going through the finished PCB 50:10 Conclusion Follow me on Instagram to stay up to date on all the latest stuff:   / electrarc240   Donate through PayPal to support more cool projects: https://www.paypal.com/paypalme/elect...