FAST CHARGING TECHNOLOGIES FOR MODERN SMARTPHONES AND THEIR OPERATING PRINCIPLES
Abstract
This article analyzes the development of charging systems for modern smartphones, their technical capabilities, and operating principles. Unlike traditional chargers, modern smartphones consume more power due to the presence of operating systems with high resource demands and radio modules constantly connected to digital networks. As a result, the capacity of modern batteries has significantly increased, making the development of efficient and safe charging methods a relevant challenge.
The article examines the fast charging principles based on Qualcomm’s “Quick Charge” (QC) technology, as well as the universal “USB Power Delivery” (USB PD) standard, their versions, differences, and operational algorithms. Additionally, experimental methods were used to study the charging process of various smartphone models using the QC 2.0 standard; the results were analyzed, and a comparative table was provided.
The study investigates the relationships between smartphone battery capacity, charging current, and charging time, the role of internal electronic circuits in controlling charging speed, and the characteristics of modern high-power chargers used for next-generation batteries. It demonstrates the possibility of increasing charging power not by current strength but by raising the voltage according to the USB PD standard.
This article may be useful for students, engineers, and specialists studying modern approaches in smartphone charging technologies and battery systems.
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