- All
- Product Name
- Product Keyword
- Product Model
- Product Summary
- Product Description
- Multi Field Search
English
Views: 32 Author: Jeannie Publish Time: 2025-03-27 Origin: Site
It seems that the battery life of the smartphone era has been greatly shortened, but the lithium battery technology is still in a bottleneck, and everyone has found a way to save the country with a curve: fast charging. Nowadays, many chargers have fast charging protocols, and the mainstream ones are USB PD, QC, AFC, FCP, SCP, VOOC, SuperVOOC, PE, FlashCharge, etc.
Middle school physics knowledge tells us that power P = current (I) x voltage (U), increasing the charging power of the mobile phone is nothing more than increasing the charging current or increasing the charging voltage, or both at the same time. Therefore, starting from this starting line, around the two power elements of voltage and current, various mobile phone manufacturers and chip manufacturers began to explore the question of "how to make charging faster".
So which is better, high-voltage fast charging or high-current fast charging?
For high voltage, it is necessary to transform the voltage to the mobile phone end, so that the voltage can drop to the range suitable for the "food" of the mobile phone battery. The energy loss in this process will be dissipated in the form of heat energy, which will cause the phone to heat up during the fast charging process. Regarding heating, if you know a little about the basics of battery life, you should know that high temperature will not only affect the feel of using your phone when charging, but also cause relatively large losses to the life of lithium batteries. In order to avoid this problem, in the early years, Qualcomm's QC fast charging even introduced the design of stopping fast charging when the phone screen is on. The main disadvantage of low-voltage, high-current solutions is the high cost of customization. From the relevant components inside the phone, the charging cable, to the charger, everything needs to be customized and adjusted according to the actual situation. Taking the cable as an example, the common general charging cable can only carry 3A current, and in order to achieve 5A high-current fast charging, the charging cable must be transformed, such as the USB-C to USB-C cable must be equipped with an e-Mark chip if it wants to carry more than 3A current. Combined with the advantages and disadvantages of traditional fast charging solutions, the most ideal solution naturally becomes high voltage and high current.
In fact, through the article of Golden Eagle Coils , we can know that the high-current fast charging scheme has gradually become popular because of its high power conversion efficiency and low body heating during charging.
