Many people have such doubts:
Obviously their phone supports fast charging, but charging is very slow, so where does the problem actually appear?
Charging speed in addition to the phone’s own factors, chargers, data lines, fast charging protocol and how to affect the charging speed?
First, what is the relationship between charging speed and charger?
First of all, to charge fast, you have to use a fast charger, the charger determines the maximum voltage and current of the charging output, the maximum charging power that can be provided to the phone, usually the charging speed can be enhanced in two ways, the first is to increase the charging speed by boosting the voltage, and the second is to enhance the charging speed by boosting the current, no matter whether it’s to enhance the voltage or the current, the ultimate goal is to enhance the power to Speed up the charging speed, because physics we have learned that power = voltage times current, the greater the output power, the faster the charging speed.
Second, the data line will also affect the charging speed of the data line is the bridge between the phone and the charging head, current transmission depends on it.
The quality of the data cable and wire performance will affect the charging speed, the same voltage, the thicker the wire, the greater the amount of power flow can carry, the faster the charging.
In addition to the cable material of the data cable, the length of the data cable will also affect the charging speed, theoretically speaking, the shorter the data cable, the smaller the wire loss, the faster the charging speed.
Third, the charging speed and fast charging protocol also has a relationship to want to realize the effect of fast charging, fast charging protocol to maintain consistency is also essential.
Fast charging protocol is to stipulate, stipulate what protocol charging speed is how fast. Each cell phone manufacturer has its own fast charging solution, and the fast charging protocols of different brands of cell phones are different.
In addition to PD fast charging, QC 2.0/3.0 public fast charging protocols, there are also Huawei’s FCP fast charging protocol, SCP super fast charging protocol, OPPO’s VOOC flash charging and so on (at present, only Huawei’s 22.5W super fast charging has been made public, and other private fast charging protocols have not been made public)
The compatibility of the protocol determines whether the charger can charge the phone quickly. For example, if you use a 30W PD fast charger to charge iPhone 11 or previous devices, you can’t realize 30W, because iPhone 11 supports a maximum of 18W; and if you use a 60W QC fast charger to charge your iPhone, you can’t realize 60W fast charging, because Apple doesn’t support QC fast charging.
Fourth, the charging speed is also affected by the temperature of the charger is generally over-temperature protection, we know that chargers, data cables and cell phones will heat up when charging, when the temperature reaches the maximum operating temperature (35 ° C or 40 °, the specific difference), the charger will be the power down to ensure that the temperature will not be too high, so when the power down the charging speed will also be down!
If the charging environment is at a high temperature, the heat can not be dissipated, it will reduce the power to reduce the heat, the charging speed will be slower accordingly, if the charging environment is at a lower temperature, the heat generated by charging can be dissipated in a timely manner, the power will not fluctuate dramatically, the charging speed will also be faster accordingly!
In addition, the charging speed will gradually slow down with the increase of power, generally charging the first 30 minutes charging speed will be faster.
In short, the charger is equivalent to the tap, is the total switch of the charging speed, the data line is equivalent to the water pipe, the phone is equivalent to the pool, fast charging protocol is the specification, the charger’s fast charging protocol provides for the speed of water release, the phone’s fast charging protocol provides for the speed of the water into the water, so the faucet water release even faster, but also have to be thick enough water pipe, the pool’s entrance is large enough to allow the water to quickly reach the pool.
If the phone doesn’t support fast charging, even with a good cable and a good charger, the charging speed won’t be fast enough!
Or the phone supports fast charging, the charging head is also fast charging, just take a slow charging data line also can not reach the fast charging speed.
Therefore, the cell phone, charger, data line together affect the charging speed, you can’t have one without the other.
