In the past, digital products such as mobile phones, tablets, notebooks, etc., were all a charger corresponding to a device, and over time the socket was full of chargers, and other electrical appliances were completely unavailable. About six or seven years ago, the overseas market began to appear several output ports of the charger, a multi-port charger can be used against several single-port chargers, enthusiasts have started with high-priced sea shopping, slowly spread among high-end players, and then the domestic multi-port charger market also began to take shape, and rapid development.
Since 2014, Qualcomm began to promote the concept of high-voltage charging, which will be 5V USB standard voltage that has been entrenched for many years to 9V and 12V, and obtain higher charging power without changing the upper limit of current carrying, and also marks the USB charger into the era of fast charging. In recent years, the widely used USB PD fast charging standard, the voltage has even increased to 15V, 20V high, the fast charging interface is no longer 5V voltage, multi-port charger has a "problem", some multi-port chargers, in the separate charging time there is a fast charge output, in the multi-device charging but only 5V slow charging. So, which multi-port chargers have the ability to multi-port fast charge at the same time?
Multi-port simultaneous fast charging and multi-port lock 5V output
The charger is actually not complicated, the charger will be the home socket on the 220V alternating current (AC), into the digital equipment required for direct current (DC), as for the DC voltage is 5V, 9V, or 20V, the fast charge protocol chip and digital devices after communication output the required voltage.
In general, multi-port chargers that support multi-port fast charging at the same time must have multiple independent circuit modules to control the voltage of different output ports, so as not to interfere with adjacent interface devices, and the performance is generally relatively high. And do not have a multi-port simultaneous output of the charger, often only 20W, 30W power, and only a single circuit, this multi-port charger in the multi-device output, in order to avoid one of the device boost affecting the other device charging, will lock the 5V output.
Multi-mouth fast filling prototype
The Tronsmart UC5F five-port charger is a multi-port fast charger born in 2015, which belongs to the era of change when QC2.0 fast charging was just introduced. This multi-port charger has 5 USB charging ports that support QC2.0 output, and can be charged quickly at the same time, the single port output parameter is 5V2.4A/ 9V2A / 12V1.5A, the maximum 18W output, the global total output power up to 90W.
After disassembling, I saw that in that rough era, Tronsmart directly made five complete QC2.0 chargers on the same PCB, the scheme was simple and rude, the interfaces did not interfere with each other, and even the damage of a single module did not affect the work of other modules. Of course, the disadvantages are also obvious, although the total power is as high as 90W, but the single-port performance is only 18W, the volume is large and the cost is also high, but in 2015, it is mainly used for mobile phone charging, which has been very fierce. This practice is short-lived, almost never followed, and belongs to a special product of a specific period.
Stand-alone modules
In recent years, the USB PD fast charging standard has replaced QC as the mainstream of the market, and various charging accessory brands are optimizing the design of multi-port chargers. The Anker A2322 is a 60W 1A1C Gallium Nitride charger that accommodates both old and new devices, and both interfaces support fast charging. USB-C output supports 5V2.4A / 9V3A / 15V3A / 20V2.25A four voltage gears, the maximum output power of 45W; USB-A output supports 5V2.4A / 9V1.66A / 12V/1.25A three voltages, the maximum output power of 15W, the global maximum power of 60W.
Charging head network disassembly found that Anker 60W 1A1C Gallium Nitride charger PCB can see two transformers of different sizes, USB-C, USB-A two output ports using their own independent circuit design, so that the single device charging performance and multi-device charging performance is completely consistent, dual-port simultaneous use of power of 45W + 15W, dual-port fast charging without interference.
Parallel stand-alone modules
The Greenlink 100W 3C1A charger is a desktop charger that is connected to the outlet via a cable to take power, providing users with a more convenient desktop fast charging experience. There are four output ports, USB-C1/C2 support power blind plug, use alone to provide a maximum of 100W PD fast charging output, USB-C3 support 20W fast charging, USB-A support 18W fast charging, up to four devices can be charged at the same time.
After disassembling, it was found that there are four transformers in the GreenLink 100W 3C1A four-port desktop charge, of which the figure-eight line next to the 220V input end, the inductance on the right side of the picture is used for PFC boost, the other two large and one small three transformers correspond to three outputs, the two large transformers are respectively responsible for USB-C1, USB-C2, USB-A and USB-C3 share a small transformer, three four-port output, and the voltage is controlled by the protocol chip. According to the use of different equipment to match the power output status of each interface, the power output of single port/ dual port / three port / four ports is 100W, 45W + 45W, 65W + 20W, 45W + 30W + 20W, 45W + 30W + 10.5W + 10.5W and other different power configurations, USB-C1 / C2 single port output of 100W using two combined outputs.
Power distribution stand-alone module
Beth GaN3 Pro 65W Gallium Nitride Charger is a three-port output charger, using high-frequency high-efficiency gallium nitride technology and three-dimensional stacking to make it very small, the appearance of bar-like design, which is currently the market more mainstream multi-port high-power small-volume charger solution. 2C1A has a total of three-port output configuration, two USB-C support power blind plug, separately inserted can get 65W output, USB-A also supports multi-protocol fast charge output, three interfaces are equipped with fast charging function.
Charging head network disassembly found that beth GaN3 Pro 65W Gallium Nitride charger three output interfaces share AC-DC circuit, and then through two buck chips to achieve two independent buck, of which USB-C1 interface exclusive one buck circuit, USB-C2/USB-A shared another buck circuit, so as to achieve two USB-C ports support blind plug output 65W, can be 1A1C simultaneous fast charge, 2C simultaneous fast charge, 3 ports output USB-C1 fast charge USB-C2/ USB-A locks 5V, multi-port power intelligent distribution. This program takes into account the comprehensive experience of full power output, multi-interface, small size, power density, cost performance, etc., and is the most common solution for multi-port products at present.
Charging head net summary
This issue of "Charging Miscellaneous" shared with you what kind of multi-port charger to support simultaneous fast charging, charger manufacturers used a variety of different schemes to achieve multi-port simultaneous fast charging output, there are simple and rude package of multiple charger modules, there are the use of large and small power independent modules to achieve multi-port simultaneous fast charging without interfering with each other, there are multiple small power modules combined output to take into account high power and multi-device fast charging at the same time, there are the use of common high-power input and then through the secondary buck power distribution to support multi-port fast charging, although they have a difference in the scheme, But there is only one purpose, that is, to allow users to enjoy the fun of fast charging several digital products together.
Compared with several single-port chargers, multi-port chargers occupy a smaller footprint, use more neatly on the desktop, release the socket hole, and streamline luggage when traveling. Support multi-port simultaneous fast charging chargers, power is generally in 40W, 65W, 100W and other high-power products, they are often the main explosive models of brand manufacturers, users can buy according to their own equipment quantity, power, external and other needs. Well, the above is all the content of this issue of "Charging Miscellaneous", everyone has any topics you want to talk about, you can leave a message to tell us, we will see you in the next issue.