How Buck, Boost & Buck-Boost DC-DC Converters Work

It can be argued that all power electronic converter topologies can be derived from these three fundamental DC-DCs, so lets take a look at how they work! JLCPCB PCB Fab & Assembly from $2! Sign up to Get $60 Coupons: https://jlcpcb.com/?from=electrarc240 What happens when: 0:00 Introduction 0:55 Why switching is so efficient 1:27 Pulse Width Modulation (PWM) 1:45 JLCPCB 2:25 Energy storage (capacitors & inductors) 3:38 Using inductors to store energy 4:47 Three fundamental topologies 5:35 Buck-boost converter 6:39 Isolated buck-boost converter (flyback) 7:01 Boost converter 7:44 Isolated boost converter? 7:54 Buck converter 10:18 Power density comparison 10:30 Isolated buck converter (forward) 10:45 Continuous current 11:59 How do we actually "pivot" the inductor? 13:26 Benefits of synchronous rectification (2x MOSFETs) 14:12 Does the theory hold up? (live demo) 15:36 Output voltage equations 16:06 How to design these converters? (next video) 16:16 Outro Support the channel & get access to extra content:   / electrarc240   Looking to buy or loan lab equipment in the UK? Check out https://telonic.co.uk/ Join the ElectrArc240+ discord server to hang out with likeminded folk:   / discord   Follow me on Instagram to stay up to date on all the latest stuff:   / electrarc240