This article introduces you to the meaning of fast charging technology, the principle of mobile fast charging technology, several modes of fast charging, and the main fast charging technology solutions on the market at this stage and their comparisons, which are provided for your reference.
First of all, what is fast charging technology? As the name suggests, fast charging is a technology that can increase the charging speed. Its principle is very simple. Through the chipset support, the voltage and current input values ​​of the mobile phone are adjusted to shorten the charging time. There are three main adjustment methods:
Three modes of fast charge technology
1. High voltage constant current mode
In general, the charging process of the mobile phone is to first reduce the 220V voltage to the 5V charger voltage, and the 5V charger voltage to the 4.2V battery voltage. During the entire charging process, if the voltage is increased, heat is generated, so when charging, the charger will heat up and the phone will heat up. Moreover, the greater the power consumption, the greater the damage to the battery;
2. Low voltage and high current mode
When the voltage is constant, the current can be increased by using a parallel circuit. Under constant voltage, the smaller the pressure shared by each circuit after parallel shunting, the same processing in the mobile phone, each circuit The pressure it bears is smaller;
3. High voltage and high current mode
This method increases both current and voltage. Thus, by the formula P=UI, we can know that this method is the best way to increase the power, but increasing the voltage will generate more heat, so The more energy is also consumed, and the voltage and current are not freely increased without limitation.
Several common fast charging solutions on the market
Although there are a lot of fast-filled mobile phones on the market, most of the solutions are based on mobile phone platforms. For example, Qualcomm platform used Quick Charge 3.0 this year. MediaTek's new machine this year usually uses Pump Express technology, and the other is well-known. There are OPPO VOOC flash charging technologies different from the two major manufacturers. Of course, there is also TI from Texas Instruments. Â MaxCharge fast charging technology, Apple 20V fast charging technology.
1. Qualcomm Quick Charge3.0
In the second half of last year, Qualcomm released a new generation of fast charging technology: Quick Charge 3.0, which uses the best voltage intelligent negotiation algorithm to achieve optimal power transfer at any time and maximize efficiency. A typical mobile phone can be charged from zero to 80% in 35 minutes. Quick Charge 3.0 is available in 200mV increments and offers flexible options from 3.6V to 20V. This will allow the phone to get the right voltage to the desired charge current, minimizing power loss, improving charging efficiency and improving thermal performance.
2. MediaTek Pump Express3.0
Last month, MediaTek launched a new generation of Rapid Express 3.0 technology. The PE 3.0 fast charging solution can charge the smartphone's battery from zero to 70% in just 20 minutes. It is reported that PE 3.0 supports two-way communication, and has more than 20 security-related device protection mechanisms, which is a charging scheme with extremely high safety factor. In addition, Pump Express 3.0 is the world's first USB Â The type-c interface for charging fast charging scheme can directly bypass the mobile phone charging circuit, and the current flows directly into the battery.
3.OPPO VOOC technology
Different from the high voltage and high current solution ideas of the above two chip manufacturers, VOOC flash charging is a typical representative of low voltage and high current fast charging scheme. While ensuring the charging speed, it can also reduce the heat generation of the adapter and the mobile phone. Compared with the traditional over-current protection, the separately customized components greatly improve the safety. VOOC flash charging creates a full-end five-fold protection from the adapter and interface to the inside of the mobile phone, providing consumers with extremely high security. In terms of speed, VOOC flash charging also has eye-catching performance. At present, the VOOC flash charging used in OPPO mobile phones can charge the battery to about 75% in 30 minutes, and can basically be filled in one hour. OPPO has previously demonstrated VOOC super flash charging technology, which is even more powerful, and it takes only 15 minutes to fill a 2500mAh battery. It is reported that the technology will be applied to the new OPPO Find 9, which is worth looking forward to. In addition, the DASH speed fast charging technology installed on the one plus mobile phone 3 released some time ago also adopts a low voltage and high current solution.
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