This video explains the technology behind fast charging in mobile phones, from early phones with linear chargers to the most advanced high power Direct-Charge-Divide/2 systems. We discuss different battery types, special charging systems like Qualcomm’s Quick-Charge QC2.0/3.0 and the new USB-C Power Delivery charging systems, covering Direct Charge and Direct Charge-Divide/2 systems that can deliver charging powers up to 45W without overheating.

We hook up oscilloscope and USB-PD analysers to different smartphones like Galaxy Note 10+ to examine their charging behaviour in detail. We will also tell you about next generation smartphone charging technology like Direct Charge-Divide/4 and dual cell battery systems.

Read more about Richtek’s ‘’Fast charging and USB PD’’ :
https://www.richtek.com/technology/fa...

Related Richtek products:
RT9467: 5A Switching charger (high current switching charger application)
https://www.richtek.com/RedirectToPro...

RT1716: USB-PD 3.0 Power delivery controller (sink side)
https://www.richtek.com/RedirectToPro...

RT9471: 3A Switching charger (medium current switching charger application)
https://www.richtek.com/RedirectToPro...


Some handy measurement tools that were used in this video: RIDEN TC66 and XYZ studio ZY1271 USB power monitors; Total Phase USB-PD protocol analyser.

music "The Stratosphere" by Adam Vitovsky