Introduction
With the development of technology, USB-C interfaces with advantages such as high-speed transmission, no front and back, lightweight and ultra-thinness have been widely used; although the charger benefits from the ultra-thin advantages of the interface, the larger-sized design may "compete for the territory" with other chargers, or even waste the standby sockets on the socket. Will there be chargers with extended plugs?
Recently, the charging head network got a Dell 45W charger. It can be said to be a flat alien under the Formal Road. It has an AC power input and DC power output, which seems to be a bit of a tribute to the classic laptop power supply design. Next, let’s experience the whole process of unboxing together, and you may find the difference.
Product introduction
Clear ideas, skip packaging.
This Dell 45W charger looks different from similar chargers in appearance. It has extension cables on both ends, similar to the shape of an old laptop adapter. The shell is made of alloy plastic raw materials, which has environmentally friendly and flame-retardant material properties. The front of
uses a matte treatment process, and the brand logo is a shiny engraving design, with round edges and no hard to deal with. The back of
is designed with grooves, and paste product specifications, inscriptions and drawings.
Model: LA45NM171
Input: 100-240V 50/60Hz 1.3A
Output: 5V3A, 9V3A, 15V3A, 20V2.25A
has CCC certification and VI energy efficiency certification mark.
AC power input interface uses the national standard 3-hole plum blossom mouth.
is equipped with a national standard 3-hole plum blossom plug, with a specification model NSW18405 printed on the front, which allows maximum power of 2.5A250V, and has a CCC certification mark.
uses a national standard triangle plug, with a specification of 250V 10A, and has CCC certification and zero templar mark.
AC power cord length is about 96cm.
users can purchase a wireless material conversion base according to different usage scenarios, which is neat and unrestrained. The output port of
is in-mold injection molding, which is not split and more stable.
DC plug is equipped with LED indicator light. The fog white indicator light will always light up or flash during no load and normal operation.
DC output cable has storage buckles, which can slide at will for easy storage.
output terminal wire length is about 182cm. The body length of the
adapter is about 87.66mm.
adapter body width is about 55.33mm.
adapter body height (thickness) is about 23mm.
is slightly thinner than 1 yuan coin. The overall weight of the
charger is about 163g.
charger body is placed in the palm of an adult male, and it is no different from that of an ordinary charger.
protocol test
adheres to the fast charging protocol not marked, and pursues the exploration of a complete protocol. It is the significance of this test, and it is convenient for users to choose devices based on specific protocols to achieve a better fast charging experience.
used POWER-Z KM002C to support the PD2.0 fast charging protocol. In terms of actual PDO packets measured by
, it supports four sets of fixed voltage gears: 5V3A, 9V3A, 15V3A and 20V2.25A, which is consistent with the specification inscription parameters.
product review
Next, let’s take a look at the specific user experience of this charger. The charging head network will take you to learn about this charger in all aspects from compatibility testing, full charging test, standby power consumption test, etc.
Charging Compatibility Test
Compatibility Testing session can clearly know the charging status of the charger for each device. The charging head network will use dozens of devices with chargers for testing, presenting real test data to readers.
iPad Air 5 is Apple's latest iPad, equipped with a USB-C interface and supports PD fast charging. It uses a charger to charge the iPad Air 5, with a power of 15.08V 2.14A 32.35W.
charges the MacBook Pro 16 with a power of 19.98V 2.18A 43.59W, which has reached the maximum output power of the charger.
Switch dock TV mode supports PD fast charging, but if you want to activate the dock TV mode, you need the PD charger to support 15V3A and above PD fast charging gear, that is, the charger must also support 45W fast charging at the lowest. Use the charger to power the Switch dock TV mode, and the charger output power is 15.02V 0.32A 4.84W, which successfully illuminates the dock TV mode.
summarizes the test data. DELL's 45W PD charger only supports PD fast charging protocol, which can provide fast charging for mobile phones, tablets and laptops, and can meet the fast charging needs of tablets and even laptops. In the histogram part of
, the laptop has the highest power, and the power of other devices is decreasing in turn.
charging full test
for the full test of charging for DELL 45W charger (model: LA45NM171). This time, the MacBook Air M1 was selected. The figure below is the actual test data.
This is the full data change diagram of charging MacBook Air M1 using a DELL 45W charger (model: LA45NM171). The entire process is roughly divided into 4 stages, with a maximum power of 20.01V 2.18A 43.56W.
From the start of the test to 36 minutes, the input power was around 43W; to 55 minutes, the input power gradually dropped to about 31W; to 1 hour and 28 minutes, the input power gradually dropped to about 22W; finally the charging ended in 2 hours and 10 minutes.
draws the entire charging process into a curve chart. It can be seen that this charger charges 39% for the half-hour charge and 70% for one hour. It takes 2 hours and 10 minutes for full charge.
standby power consumption test
Nowadays, it has become normal for users to no longer unplug from the socket after using a charger to charge the device. Many readers want to know whether a charger is wasting electricity if it is always plugged into the socket. The standby power consumption test is to answer this question.
After power meter testing, the no-load power consumption of the charger at 220V 50Hz is 0.045W. In terms of conversion, the electricity loss in one year is about 0.39KW·h. If the market electricity is 0.6 yuan/KW·h, the charger's annual electricity bill is about 0.23 yuan.
Summary
standby power consumption test is how much power will be consumed in a year if the charger is plugged into the socket without using it. The lower the value, the better. According to actual tests, the DELL 45W charger is not used on sockets in a 220V mains environment, and the electricity bill used in a year is only about 20 cents; while in a 110V mains environment, the electricity bill used in a year is only about 6 cents. Almost negligible.
conversion efficiency test
charger is essentially a conversion device, which will cause losses during the process and emit in the form of heat. We usually see that the parameter output of the charger is 100W or 65W, which is the maximum output power that the charger can provide to the device, but the power drawn by the charger from the socket is often greater. Below is the charger conducted conversion efficiency tests with 220V 50Hz and 110V 60Hz AC inputs respectively. The test results are as follows.
Summary
conversion efficiency can reflect the quality of the charger. From the data point of view, the higher the percentage, the better.From the above test data, it can be seen that the efficiency of multiple power outputs is around 88%, and it is at the mainstream level in a comprehensive high-power charger.
ripple test
Since the charger uses a switching power supply, the secondary output of the transformer is not DC, and it needs to be output through rectification and capacitance filtering, that is, there will be ripple when the charger output is output. The charging head network uses an oscilloscope to test the ripple value of the charger output, compare it with the national standards, and detect the output quality of the charger. The lower the ripple, the higher the output quality of the charger.
ripple tests are divided into two types: no load (the Y-axis current is 0A in the bar chart) and heavy load (the Y-axis current is non-0A in the bar chart). In the no-load part, the charger has the highest ripple when it is in the 5V0A no-load state at 220V 50Hz AC input, and is 110mVp-p; when it is in the 15V0A no-load state, the lowest ripple when it is in the 48mVp-p.
charger has the highest ripple when it is in the 20V0A no-load state at 110V 60Hz AC input, and is 90mVp-p; when it is in the 15V0A no-load state, the lowest ripple when it is in the 48mVp-p.
reload part, the charger has the highest ripple when it is in the 5V2A output state at 220V 50Hz AC input, which is 122mVp-p; the lowest ripple when it is in the 9V3A output state is 66mVp-p. The
charger has the highest ripple when it is in the 20V3.25A output state at 110V 60Hz AC input, and is 146mVp-p; the 9V3A output state is the lowest ripple when it is in the 62mVp-p.
Summary
The lower the ripple value, the higher the output quality of the charger. Judging from the data obtained from the test, the ripple value of the entire charger is between 70mVp-p and 100mVp-p, which means that the quality of the charger is still good.
Temperature test
mentioned earlier that when the charger works, it involves the issue of efficiency conversion. Most of the power loss is dissipated by heat, so the heating condition of the charger working for a long time is also an important part of the test. Let the charger output continuously at 20V2.25A 100W power for one hour, collect the charger surface temperature, and place the charger in a 25°C constant temperature box throughout the experiment.
First, let’s take a look at the temperature performance of the charger in a 220V50Hz mains environment.
The maximum temperature on both sides of the other side is 51.7℃.
Let’s take a look at the temperature performance of the charger in a 110V 60Hz mains environment.
The maximum temperature on both sides of the other side is 54.1℃.
summarizes the four temperature data tested into a table, and the four temperature data are all around 54℃. This temperature is still very low for a 45W charger. In the histogram section of
, the temperature of the charger is the highest at 110V mains input, at 54.6℃; the temperature of the charger is the lowest at 220V mains input, at 51.7℃.
Charging Head Network Summary
This Dell 45W charger inherits the old laptop power supply design in appearance, and supports two types of power supply input connection methods on the original basis. The USB-C output interface design can be adapted to most smart devices on the market, and the adapter body is small, light and easy to carry. In terms of performance of
, DELL's charger adopts a USB-C integrated fast charging cable design and supports 45W PD fast charging. It is measured to provide good fast charging support for mobile phones, tablets and laptops. In two types of mains, 110V 60Hz and 220V 50Hz, standby power consumption less than 0.05W, conversion efficiency between 82% and 91%, and ripple values under most voltage levels are all lower than 100mVp-p. The actual test results prove that the output quality of this charger is at the mainstream level. In terms of temperature, thanks to the flat body design, the full load of 45W is only about 55℃ for one hour, which is still very good.
Overall, the Dell 45W charger uses a USB-C interface, which is compatible with the fast charging needs of mobile phones, tablets and some laptops. Its conversion efficiency, power output quality and other aspects are non-radical in similar products, and there is more room for adjustment; for users, they should consider whether it is suitable for purchase based on their own equipment and usage scenarios.
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