How the phone achieves high power fast charging?
2023-01-09 Views：36
Using the factory-supplied 120W charger to charge the Redmi Note11T Pro+, the charger specification parameters indicate the output: 5V3A, 9V3A, 11V6A, 20V6A. The measured power is 17.6V 4.8A 84.61W, successfully triggering the Xiaomi system fast charging.
After simplifying the 120W charger for the phone charging process, first the phone and charger handshake 20V 6A high-voltage high-current direct charging gear, the power quickly rose to the highest stage, the charger to 20V 6A 120W high-power output, to reach the phone internal parallel lines into two high-voltage low-current (20V3A) way, after the two parallel charge pump converted into two low-voltage high current (10V6A), and finally converge into a high current of 10V12A to charge two series-connected battery packs at the same time, each battery carrying 5V 12A charging, the effect of this is that the charging heat will be lower, and charging is very safe, while charging takes less time.
Is it safe to charge the phone with a high-power charger? High-powered chargers charge the phone will not charge bad? This is an enduring problem, as elementary as it sounds, but for many ordinary consumers will indeed have this concern. According to the normal logic of high-powered chargers should be used with a laptop or tablet computer, suddenly downgraded to charge the phone, so high power for the phone can withstand does require attention.
To Hangar's new products, for example, this charger supports up to 20V5A output gear, that is, to support up to 100W output power, this power size even for laptop charging can fully meet its needs, but ...... can charge cell phones? Here is a direct conclusion, can charge, and will not charge the phone, is safe (provided that the use of regular big brand chargers).
20V high-voltage fast charging is prepared for laptops and other large power devices, such as the above picture for MacBook Pro 16 2021 charging, the charger output 20V high-voltage fast charging, power in the 92W or so, which has almost reached the maximum output power of the charger.
Through the POWER-Z KM001C tester with the upper computer to monitor the charging process, you can also see the handshake process between the charger and the laptop, and finally the laptop requested the output of 20V 4.7A gear, so the charger as the power supply side to accept the request, the output of 20V 4.7A for the laptop charging.
Now the phone has been supported to 100 watts of fast charging power, and many third-party chargers have also been supported to 100 watts of fast charging power. That does not mean that the use of third-party 100-watt fast charging head can achieve the same fast charging effect of the original 100-watt fast charging head? This sentence is a bit around, interested readers can read slowly, comb through.
I believe that there are many readers here to say yes, because the power is the same or similar; there will be many readers say no, because the brand is different. And the correct answer is: not necessarily.
The same scene, the same phone, just change the two third-party 100-watt fast charging head, the data obtained is very different. This is because the phone supports PD, PPS and other fast charging protocols, Apple 96W charger only supports PD fast charging, so charging the phone can naturally trigger 9V3A PD fast charging, the power is about 27W; while Hangjia 100W GaN charger is to support 3.3-21V5A wide range of PPS fast charging, charging the phone to trigger PPS fast charging, the power reaches 100 watts level.
Will the 100W charger charge the phone badly? The answer is yes: no. As you can see from the above test section and the process of monitoring the charging with the OP, the 100W charger charges the phone with intelligent adjustment of the charging power.
Take Hangjia 100W GaN charger as an example in the article, the charger supports 5 V3A, 9 V3A, 12 V3A, 15 V3A and 20 V5A five output gears, different gears are prepared for different devices. For example, 5V, 9V and PPS fast charging are more for cell phones and other small power-using devices; 15V and 20V are more for tablet PCs and laptops. So when the charger is charging the device, the device will give priority to the charging specifications supported by the charger, and then the charger will output the corresponding specifications.
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