Cell Phone Fast Charging Technology Principle and Comparison Classification

This article provides the meaning of fast charging technology, the principle of fast charging technology for cell phones, several modes of fast charging and the main fast charging technology solutions on the market at this stage and the comparison between them for your reference.

First, what is fast charging technology? As the name implies, fast charging is the technology that can enhance the charging speed. Through the chipset support, it is very simple to adjust the phone's voltage and current input value, thereby reducing the charging time. There are three main types of adjustments:

Three modes of fast charging technology

1. High voltage constant current mode

The general charging process for cell phones is to first reduce the 220V voltage to the 5V charger voltage and then the 5V charger voltage to the 4.2V battery voltage. If you increase the voltage, the charging process generates heat, so when charging, the charger will be hot, and the phone will also be hot. And so, the greater the power consumption, the greater the damage to the battery.

2. Low voltage high current mode

In the case of a certain voltage, increase the current. You can use the parallel circuit for shunt, constant voltage. The smaller the pressure shared by each circuit after parallel shunt, the same treatment in the phone, the smaller the pressure on each circuit.

3. High voltage, high current mode

This way increases the current and voltage simultaneously, so by the formula P = UI, we know that this way is the best way to increase power, but increasing the voltage simultaneously will generate more heat. Hence, more energy is consumed, and the voltage and current are not unlimited arbitrarily increase.

Several common fast-charging solutions on the market

Currently on the market, although many fast-charging cell phones, the vast majority of the program is based on the cell phone platform, such as the Qualcomm platform this year using Quick Charge 3.0, MediaTek platform this year's new machines usually use Pump Express technology, in addition to the more well-known and different from the two major manufacturers of OPPO VOOC flash charging technology. Of course, there is also TI MaxCharge fast charging technology from Texas Instruments, Apple 20V fast charging technology, etc.

1. Qualcomm Quick Charge3.0

Late last year, Qualcomm released a new generation of fast charging technology: Quick Charge3.0, using the best voltage intelligent negotiation algorithm to achieve the best power transfer at any moment and maximize efficiency. It can charge a typical phone from zero to 80 per cent in 35 minutes.

Quick Charge 3.0 offers the flexibility to choose from 3.6V to 20V in 200mV increments. This will allow the phone to get just the right voltage for the desired charging current, thus minimizing power loss, increasing charging efficiency and improving thermal performance.

2. MediaTek Pump Express 3.0

MediaTek has launched a new generation of Pump Express 3.0 fast technology. PE 3.0 fast charging solution can charge a smartphone's battery from zero to 70% in just 20 minutes. PE 3.0 supports bi-directional communication and has more than 20 built-in safety-related device protection mechanisms, making it an extremely safe charging solution.

In addition, Pump Express 3.0 is the world's first fast charging solution that uses the USB Type-C port, which can bypass the phone charging circuit and have the current flow directly into the battery.

3. OPPO VOOC technology

Unlike 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 solutions. Ensuring the charging speed simultaneously reduces the adapter and the phone's heating conditions. Compared to traditional over-current protection, individually customized parts greatly enhance safety.

VOOC flash charging from the adapter interface to the phone inside creates a full-end type of fire protection to bring consumers a very high level of security. Regarding speed, VOOC flash charging also has an eye-catching performance. The current VOOC flash charging used by OPPO phones can be charged to about 75% of the power within 30 minutes, 1 hour basically can be full.

OPPO has previously demonstrated VOOC super flash charging technology, which is even more powerful and takes only 15 minutes to fill a 2500mAh battery. There are reports that the technology may be applied to the new OPPO Find 9, which is worth looking forward to. In addition, some time ago, released on a Plus cell phone three equipped with the DASH speed fast charging technology is also used in the low-voltage high current program.