What is the relationship between the charging head and the fast charging function of the mobile phone?
The fast charging speed of the mobile phone depends on the charger or the data cable? Some people may find this question a bit redundant. The answer must be that both are important, but often many people face different fast charging protocols and different data cables when they want to replace the original charging head or the data cable is broken / lost The specifications are ignorant. Worried about the phone charging speed is much slower than the original because of the wrong choice, or fear of hurting the phone.
The charging speed of a mobile phone simply depends on the charging power, and charging power = voltage and current, so to achieve fast charging, either increase the voltage or increase the current. These are also the two main forms of fast charging technology currently on the market.
What is the relationship between fast charging speed and charging head? When charging a mobile phone, the charging head determines the size of the voltage and current, which is equivalent to a "faucet", as is fast charging. For example, Huawei SCP super fast charge, support output 4.5V / 5A, charging power up to 22.5W, in addition, Xiaomi supports QC3.0 fast charge output 9V / 2A maximum power 18W, Samsung supports AFC fast charge output 12V / 2.1A , 9V / 1.67A, maximum power 25W, and Apple mobile phone supports PD fast charge is also output 9V / 2A maximum power 18W.
Most fast charging is backward compatible with 5V / 2A, which means that if the phone does not support fast charging, it can also be used. What happens to mobile phones that support fast charging using different charging heads?
For example, QC3.0 and PD fast charge also output 9V / 2A, but if iPhone 11 uses the QC3.0 charging head, it can only reach 5V / 2A at most, and PD fast charge cannot be activated. The same is true for other mobile phones. in this way. Therefore, if you want to replace the charging head, you need to know not only the maximum charging power, but also whether the charging head is compatible with the fast charging protocol of the mobile phone, so as to achieve the fastest charging speed.
Of course, there are many third-party manufacturers' charging heads that are compatible with a variety of fast charging protocols. Taking the PD charging head of the well-known domestic brand UGREEN as an example, let's look at the main structure of the fast charging head to understand the fast charging : The function of the rectifier bridge is to convert household AC power into DC power. The following is the power control chip (PWM) of the American PI brand that enjoys a high reputation at home and abroad. The performance is stable and reliable.
On the other side, it can be seen that the small circuit board standing vertically is a charging protocol chip. This is an advanced chip from Weiquan of Taiwan. It supports PD fast charging, QC4.0 and 3.0 fast charging protocols. The yellow ones are high-frequency transformers. In addition to stepping down the voltage, it can effectively isolate the primary dangerous high-voltage electricity and transmit it to the secondary pressure measurement output to prevent users from being in danger during charging.
What is the relationship between fast charging speed and data line? The data cable is connected to the mobile phone and the charging head, and is mainly responsible for current transmission. If the charging head is a "faucet", then the data cable is of course the "water pipe", so it is inevitable and will affect the charging speed. What do you need to pay attention to when choosing a fast charging cable?
The charging head mainly depends on the charging power and the fast charging protocol, and the data line is relatively less complicated. In terms of specifications, the main concern is the size of the supported current. At present, most of the Micro USB interface cables on the market transmit current of 2A, but there are some charging lines that do not have signal cores. They can only charge and cannot transmit data. The current that supports transmission is only 500mA. You need to pay attention when choosing.
The Type-C data cable can transmit most of the current at 3A, which is basically common among brands. However, the data cable supporting Huawei SCP fast charging supports a transmission current of 5A. However, using a 5A data cable that supports Huawei SCP fast charging to charge other brands of mobile phones can't achieve the fast charging effect. Similarly, using other brands of data cables to charge Huawei SCP mobile phones can't reach the SCP's charging power.
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