Why do dual-port chargers lose power when charging?
2022-12-13 Views：38
With more and more electronic devices in the hands of users, the number of chargers is also increasing, cell phones, tablets, laptops, watches, Switch, etc. If each device is equipped with a charger when you go out, the backpack is estimated to have been filled with chargers, so multi-port chargers have emerged.
In the previous blog, BON has said that the dual-port charger in only access to a device, and then access another device, at this time the first device will again prompt charging, display charging UI; from the internal circuit design of the program is different, so the performance of the way is charging reconnect, the next, BON will explain the basic idea of dual-port charging and some dual-port non-stop products.
Although users now have more and more electronic devices in their hands, but it is undeniable that the laptop plus cell phone is still the majority of users in the hands of the golden two sets. So dual-port chargers are naturally more appropriate. But the development of technology will also bring some side effects, the charger is no exception.
Power failure is actually a "side effect" of the dual-port charger. As a simple example, this is Samsung's 65W three-port charger, which can charge three devices at the same time. And if charging for two devices will be a variety of collocation.
Now connect one of the USB-C ports to the phone for charging, at which point a second cable is inserted to charge the other phone. At the moment of inserting the second cable, you can see the output power of the USB-C1 port disconnected for a bit. Although the 2 USB-C interface common output to charge the phone.
The moment the first interface disconnected as described above is called a power failure. The impact of this phenomenon on the daily charging is said to be large, not small. But there are many users feedback really uncomfortable to use. In other words, whether the user wants to buy a charger will not be because of whether the power will be cut off for this reason and give up buying; and if you do not want to buy a charger will be because of the phenomenon of power failure will become more do not want to buy.
So why would the power go out? The emergence of multi-port chargers to ease the pressure of the socket when charging multiple devices, but the design of multi-port chargers also has a lot of doorways. Manufacturers can directly and brutally package the two chargers directly to a shell, so that the interface can do 1 + 1 = 2, and the volume of the charger is also the corresponding 1 + 1 = 2.
This is obviously not a good solution for multiple devices to use 1 charger charging at the same time. So manufacturers in order to reduce the size of the charger, the 2 ports are designed to output the same way, which has the advantage of effectively reducing the size of the charger. In the interface 1 + 1 = 2 at the same time can also do the volume of the charger 1 + 1 < 2.
Another point is that manufacturers tend to advertise the maximum output power when they advertise the output power of the charger, such as a dual USB-C interface charger, USB-C1 supports 65W fast charging when the independent output, when the 2 USB-C interface output at the same time will become 45W + 18W distribution mode.
Charging will power off, which is actually the manufacturer for the sake of the user to prevent burning the device. Users in the use of multi-port chargers, when the wire is inserted into the charger interface is often very arbitrary, and will not deliberately choose a fixed interface.
For example, or the above 45W +18W allocation problem, at this time USB-C1 is charging the phone with 18W power, and then access to a second phone, the chip inside the charger will disconnect the USB-C1 interface and re-examine the maximum received power of the two devices, if the maximum charging power of the 2 phones is 18W, the power allocation of the charger when outputting at the same time is 18W +If there is no power off to redistribute power this step, the charger dual-port output at the same time brainless output 45W + 18W, the probability of the phone will be burned phenomenon, both users and manufacturers do not want this.
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