How does mobile phone fast charging work?

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