The HyperJuice 100W GaN USB-C Charger, which began crowdfunding on Kickstarter and Indiegogo in November 2019, quickly cleared its target and ultimately ended far more than desired. The initial lot was shipped as scheduled in January 2020, and one of them arrived at hand so I tried using it immediately.
▲ The corresponding screen of Kickstarter. The target has been reached shortly after being published. Japan alsoThe project is underway at Makuake
▲ Simple paper box package. My luggage left Hong Kong and arrived for some reason via Sweden
Savior in the age of mixed USB standards
With the recent spread of USB Type-C, the number of compatible devices has increased, so we are actively replacing them. Mobile batteries for smartphones, tablets and PCs, and now USB Type-C. Thanks to this, cables can be shared, and luggage has been reduced and it has been saved. At the same time, the number of devices that support USB PD (Power Delivery) has increased, and high-speed charging at high voltage has become possible. Once you start using USB PD, it is so comfortable that you no longer want to use it.
But what matters is the USB AC adapter. Most of USB Type-C can be used, but power rule by USB PD is not so. There are several voltage and current settings between 5V and 20V, and high-speed charging is not possible unless connected with the optimal settings.
If you have a 96W type for the largest 16-inch MacBook Pro, you can use it with most devices, but there is only one USB Type-C output port. There are 4 ports on the MacBook Pro (one is used as a power supply) so you can connect them, but it is not smart. The HyperJuice 100W GaN USB-C Charger is the smart solution to such a power situation.
85.3 x 60.8 x 28.9 (mm) The smallest size in its class, with two USB Type-C and Type-A ports each. USB Type-C supports a maximum of 100W in total in response to USB PD 3.0. The USB Type-A side has a maximum output of 18W in total, corresponding to Quick Charge 3.0, and is the largest output in its class. With this, almost all common peripherals will be compatible.
▲ USB Type-C and Type-A are equipped with 2 ports each. Probably the most balanced port configuration at present. At the top is an LED indicator that emits light when energized
▲ USB Type-C is PD 3.0 standard, almost full support of 5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, 20V / 5A without any complaint. USB Type-A side is QC 3.0 standard, 5V / 3A, 9V / 2A, 12V / 1.5A
▲ Comparison with Apple 96W AC adapter. Other than thickness, HyperJuice 100W GaN USB-C Charger is small
▲ What is noteworthy is its weight. Weight is more than 30% lighter than the size difference. When you actually have it you can feel a considerable difference
100W in USB Type-C is a considerable thing. I tried using a MacBook Pro 16-inch and 13-inch connected at the same time, but if the MacBook Pro had a certain amount of battery power, it could be easily supplied to two. If the main unit is in sleep mode, it can be fully charged even when the battery is almost empty. Also, since the USB Type-A side is a separate circuit, it is helpful to be fed without worrying about the power of USB Type-C.
Because of the GaN, the heat generation was mild even at the full power supply, and the case did not become so hot that it could not be touched.
▲ I connected MacBook Pro 16 inch and 13 inch at the same time. If there is a certain amount of battery remaining, power could be supplied without any problem
A convenient plug adapter for foreigners
What I found convenient though simple was the fact that it came with plug adapters for various outlet shapes overseas. Since the plug adapter is firmly fixed in a style that connects directly to the main unit, it can be inserted more stably than an ordinary plug adapter. Recently, there are more places that can be used without such an adapter, but these accessories are very helpful because they are not all.
The plug attached to the HyperJuice 100W GaN USB-C Charger body is an A type that is mainstream in Japan and the United States. Because it can be folded and stored in the main unit, there is no need to carry extra cables.
However, the position of the plug is in an unstable part, so if you plug in a heavy 100W compatible cable, a loose outlet will come out more and more in proportion to the weight of the adapter itself. In such a case, it would be safer to attach it via a table tap.
▲ The A type is built into the main unit in a storage type. The included plug adapter is also included. The plug adapter is securely connected to the main unit and can be used, so it does not wobble
▲ 200g with adapter body. When the cable is added to it, the plug part takes a certain amount of weight. If there is a plug in this position, I was worried that it was easy to come off
What is GaN that enables miniaturization so far?
The reason why the HyperJuice 100W GaN USB-C Charger has been so small and lightweight is that it uses GaN (gallium nitride) for the internal switching power supply. GaN has long been used in the high-brightness LED industry and is an integral part of the existence of blue LEDs. In recent years, its application to switching power supplies has been advanced due to its excellent power conversion efficiency.
Most switching power supplies commonly used in existing USB adapters use silicon-based transistors, and the process of converting the required power supply generates heat due to internal efficiency and other factors. Under the same conditions as silicon-based GaN, heat generation is small due to good internal efficiency, and stable operation at high temperatures is possible, so the heat dissipation structure can be reduced, thus achieving a significant reduction in the size and weight of the power supply unit. did. The current challenge is the cost of manufacturing, but its popularity will surely lower prices.
By the way, HyperJuice 100W GaN USB-C Charger is usually $ 99. It is scheduled to be 9900 yen (excluding tax) in Japan.
Looking at the Chinese mail order page, power supplies using GaN of similar shape and similar specifications have been released other than the Hyper brand. Since the factories where GaN modules can be manufactured are still limited, power supply manufacturers are likely to be nearby.
In addition, in order to use such a power supply in Japan, it is necessary to have a PSE mark approved that meets Japanese safety standards. The HyperJuice 100W GaN USB-C Charger meets the safety standards of each country as well as the PSE in Japan, so that point is safe. Conversely, do not buy products that do not meet safety standards. Even if the basic configuration is the same, there may be quality issues.
It is expected that adapters with GaN modules will appear more and more in the future. Power adapters are always a key device, so expect better products.
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