Charger Suntaiho QC3.0 Single USB EU Charger. Take a look at what's inside.

In the review today, budget charging with a European plug, one output and support for Qualcomm QC3.0.
Yes, frankly, we have yet another Chinese noun, but at an affordable price, with a large number of orders and good reviews. Well, let's see, this is a miracle of Chinese thought.

First of all, I would like to note some confusion.with technical data for this model. The maximum power up to 15W is indicated on the device itself (4.2V-6.5V \ 2.4A, 6.5V-9V \ 1.67A, 9V-12V \ 1.25A). But in the description of the product and in the name of the lot, in bold text the power is declared as 18W (3.6-6.5 V / 3A 6.5 V-9 V / 2A 9 V-12 V / 1.5A). I don’t even know who to believe now, but as a rule, before reading a purchase, we read the description rather than looking at the small text in the photographs. I will take them as a basis.
- Brand Name: Suntaiho
- Model: QC3.0 Single USB EU Charger
- Input: AC 100-240 V
- Output: 3.6-6.5V / 3A 6.5V-9V / 2A 9V-12V / 1.5A
- Color: white, black
Charging arrived in a simple white box, on which on the front side there is a “brand” - Suntaiho, and on the back - a certain address, maybe the place of production, or maybe not.

The package is essentially missing, because apart from the device itself, there is nothing more in the box. For such a price, it would be strange to expect something more.

The model looks usually - white plasticcase, all glossy. The seller is also available in the black version, which is again glossy. I took a white one, because on it all the scratches and chips that will cover the case after a while will be less noticeable. The brand name, as you can see here, is nowhere to be found, only Qualcomm QC3.0 support and brief performance characteristics (up to 15W) are noted.

Our plug is European. Collective farms adapters do not have, which of course pleases. The only way out is placed on the top end. It is painted green and is no longer marked.

The dimensions measured by me were as follows: the length, taking into account the "mustache" of the plug, was 87.3 mm, the width was 48.4 mm and the thickness was 27 mm. It weighs only 61.6g, which at first seemed very small to me.

But comparing with a similar, but branded AukeyPA-T9 (which weighs even less - 57.8g), I realized that everything is fine, and in principle it should be.

Internal structure
Appearance is understandable, here all the charges are almostthat on one face, but the internal content is much more interesting event. Of course I could not pass by without showing it to all of you). But as often happens, the Chinese are gluing the case tightly, thereby complicating the level of maintainability. In this case, the hero of the review in this regard was no exception. Until recently, I wanted to get by with a little blood and not disfigure the appearance, but alas. I had to make some brute force to get to the contents)).

Inside we observe a small board with a denseplacement of items. Let's analyze circuitry in more detail. At the input, they did not forget to install a fuse at 2.5A / 250V, already a plus for a rootless charge, but there is no full filter. Gather input electrolytic capacitor at 15uF 400V. Transformer without marking, the usual sizes for such a device. A Schottky Diode from Silikron is used as a rectifier SSBD10L100CTF (TO220F). Also at the entrance you can seeJnc interference suppression capacitor from Jnc - JN222M 2.2nF / 400V. A pair of smoothing electrolytic capacitors is soldered at the output, one of which is at 1000uF 16V, and the second at 330uF 16V.
PWM - controller from DongKeSemicondutor - Dk125, often used solution in various power supplies 12V \ 2A. Next to him we see an optocoupler DP817C (PC817), again very common in such exercises. I think the front part of the board was fully considered, let's move on to the reverse. There are very few elements on it, this is a diode bridge ABS10 and controller Q61Bresponsible for the recognition of fast charging Qualcomm QC3.0 \ 2.0.
Board marking: HT-21Q366ALLCE REV: A dated 03/09/2018.
In general, the assembly is not bad, especially for the money that is asked for for the device. There is nothing criminal here - it will work.

More photos of the insides

Let's move on to all kinds of checks and tests inreal conditions. To get started, I checked the list of supported charging protocols using the ZY1276 USB tester. It turned out to be quite good: in addition to the previously announced Qualcomm QC3.0 \ 2.0, there are also Apple2.4A, Samsung 5V \ 2A, DCP 5V \ 1.5A, Huawei FCP 9V \ 2A and Samsung AFC 9V \ 2A. A rich set, not every branded copy can boast so.

Roughly speaking, we have three operating modes - these are 5V, 9V and 12V (or intermediate between them). Therefore, I tested the charger in each of them.
- In 5V mode, without load we have exactly 5.00V. With an increase to 2A, we observe a slight decrease to 4.94V. And at 3A - up to 4.91V. The declared maximum gives out without problems, without critical underestimation of voltage. With the help of an electronic load, I was even able to set the current to 4A, while the voltage did not go down very much again - 4.88V. I wonder if the current protection and at what level it works? So I didn’t force rape charging, enough of that which gives honest 3A.

- Second operating mode - 9V, idlinggives out - 8.97V. Of course a little lower than I would like to see. Under a nominal load of 2A (or 18W) it drops slightly, to 8.91V. To find out if the safety margin, I unscrewed it to 3A, while the voltage dipped to 8.88V. Not a bad result actually.

- The last third mode - 12V, idlingwe have - 11.99V. With standard 1.5A, it sinks to 11.94V, and at 2.5A to 11.91V (this is 30W). Held well done. At the same time, I did not observe a strange smell of burning, melted plastic, or whistling. The charging works quietly.

All of the above tests were of courseshort-term, to quickly determine the behavior of the hero of the review in each of the operating modes. But this is not enough, you need a full-fledged stress test. To carry it out, I set the maximum declared load to 18W (12V / 1.5A) and left it in this state for 4 hours. Usually I haven’t run this test for so long, but since I decided to charge the name, let me work a little more than usual. As a result, the process was successful, nothing caught fire, did not explode. The set current was kept at the same level, without dips and drawdowns. The temperature of the case in the hottest place reached - 63.1g. (with room 24g.). It’s quite okay.

Paired with real devices, it behaves as it should, gives the right current and the right mode. For example, the Xiaomi Mi6 phone is charged at the regularly accelerated pace of QC3.0.

And the iPhone 7 is in 5V \ 1.5A mode.

At first I was pessimistic aboutin relation to this charger. Low price and lack of brand is always a lottery, sometimes you can win, and sometimes on the contrary - lose. But as you can see, with all its simplicity, the hero of the review showed himself on the good side. It’s quite a good charge for little money, supporting several of the most common types of fast charging (Qualcomm QC3.0 \ 2.0, Apple2.4A, Samsung 5V \ 2A, DCP 5V \ 1.5A, Huawei FCP 9V \ 2A and Samsung AFC 9V \ 2A) issuing declared currents without critical voltage drops. And buying or not is of course everyone’s business.
That's all for that, thanks for watching!