イチケン USB充電器を自作する。「勢いで作るフライバックコンバーター」編

✅ Thank you to JLCPCB for providing this! New users can get a $70 coupon! Click the link now to get it! https://jlcpcb.jp/?from=ICHIKEN1 Follow and DM the JLCPCB Japan Twitter account here to receive a $10 coupon! JLCPCB Official Twitter:   / jlcpcb_japan   Circuit Diagram: https://github.com/ichiken-youtube/31... Parts List (Notes in the memo section): https://www.digikey.jp/ja/mylists/lis... Note: Some URLs in the description section contain affiliate ads. ◤Equipment Used◢ LCR Meter ET4410 https://s.click.aliexpress.com/e/_onX... Thermograher HIKMICRO Mini2 https://amzn.to/40N5Dqm goot Soldering Iron PX-280 https://amzn.to/41IhFBX List of tools used by Ichiken, including soldering irons → https://amzn.to/44nF0KV Teledyne LeCroy HDO6104B 1GHz Oscilloscope https://teledynelecroy.com/japan/prod... ◤Links◢ You can purchase Ichiken's electronics products and T-shirts here (associate link): https://amzn.to/3QxN8Av Official LINE: https://lin.ee/3bFpFHB Official Website (for corporate inquiries, etc.) https://bit.ly/ichiken-ad Official Blog https://ichiken-engineering.com/ Twitter   / ichiken_make   ◤References◢ Product Page https://www.power.com/products/tinysw... Design Example https://www.power.com/design-support/... ◤Table of Contents◢ 0:00 Let's build a USB charger! 1:14 JLCPCB promotion 1:47 USB charger circuit diagram 3:39 Deciding on components for the input and output circuits 10:45 Deciding on components while looking at the power supply IC datasheet 19:54 Flyback transformer design 27:20 How to determine a snubber circuit 29:22 Selecting a secondary rectifier diode 30:10 Build a flyback transformer. Wind the windings. 34:06 Operating it. 35:43 Temperature measurement. 36:39 Efficiency measurement. 37:13 Flyback converter operating waveforms (primary and secondary winding current waveforms, VDS). 39:25 Output voltage feedback (output voltage waveform, primary winding current). 40:43 Verifying continuous operation. 42:00 Summary. ◤ Business Inquiries ◢ Learn more about Ichiken's PR services: https://bit.ly/ichiken-ad Email: [email protected] We welcome sponsorship and PR opportunities. Please feel free to contact us.