Preface
As we all know, GaN is a new type of semiconductor material used in chargers. Its power is about 900 times higher than silicon. Thanks to the mature technology brought about by the development of science and technology, it has the characteristics of easy heat dissipation and small size. It is one of the most important materials in chargers with characteristics such as low loss, high temperature resistance and so on.
Before this, there were many chargers with the same power. So what would be the difference between chargers with the same power and different materials under the same brand? Next, we will know today’s protagonists, two 120W chargers from vivo. Let’s see what surprises there will be compared with what you have in your hands.
Appearance
The idea is clear, let’s talk about the appearance first.
Both vivo chargers are made of white flame-retardant material casings with rounded edges and a warm feel.
interface configuration
interface configuration, the 120W gallium nitride charger has a single USB-C interface, the 120W charger has a single USB-A interface, and the female ports are all white plastic cores.
performance parameters
Both chargers are designed with fixed pins, and product specification inscriptions are printed on the bottom.
vivo 120W GaN charger model: V12060L0B0-CN
output: 5V2A, 9V2A, 11V6A, 20V6A, 5-20V3.25A
vivo 120W charger model: V12060L0D0-CN
output: 5V2A, 9 V2A, 11V3A, 11V5A, 20V6A
are all manufactured by com Made in by Shu Technology Co., Ltd. and printed with the CCC certification mark.
Volume weight
120W gallium nitride charger size is about 28.82x60.99x52.39mm, volume is about 92.1cm³; 120W charger size is about 28.78x66.13x65.6mm, volume is about 124.9cm³; but in terms of volume it can After distinguishing the size, of these two chargers with the same power, the gallium nitride charger has a higher power density.
The weight of the 120W gallium nitride charger is about 136.4g, and the weight of the 120W charger is about 166.6g. Naturally, the latter is heavier in the hand.
protocol test
using POWER-Z KT002 measured that both chargers support fast charging protocols such as QC2.0 and PD3.0, but the 120W gallium nitride charger supports two more charging protocols, QC4.0 and PPS.
In terms of measured PDO messages, both chargers support five sets of fixed voltage levels: 5V3A, 9V3A, 12V3A, 15V3A and 20V3.25A. The 120W gallium nitride charger supports a set of PPS voltage levels of 5-20V3.25A. .
Full charging test
For vivo 120W charger and vivo 120W gallium nitride charger, this time I chose to charge iQOO 9 Pro. The following is the actual measured data.
plotted the charging data of the iQOO 9 Pro from the two chargers into a curve chart. It can be seen that the two curves almost overlap. At 5 minutes, the 120W gallium nitride charger is slightly faster, charging 42%; at 10 minutes, the 120W gallium nitride charger is slightly faster, charging 76%; when fully charged, the two chargers take the same time, only 16 minutes .
Standby power consumption test
Nowadays, it has become normal for users to not unplug the device from the socket after using the charger to charge the device. Many readers want to know whether the charger wastes electricity if it is always plugged into the socket. The standby power consumption test session is to answer this question.
made a histogram of the standby power consumption data of the two chargers under different input voltages. The no-load power consumption of the vivo 120W gallium nitride charger at 220V 50Hz is 0.079W, which translates into a power loss of approximately 0.69W per year. KW·h, if the market price of electricity is 0.6 yuan/KW·h, the charger’s annual electricity bill is about 0.414 yuan. The no-load power consumption of
110V at 60Hz is 0.039W. After conversion, the power loss in one year is about 0.34KW·h. If the market price is 0.6 yuan/KW·h, the annual electricity bill of the charger is about 0.204 yuan.
The no-load power consumption of the vivo 120W charger at 220V 50Hz is 0.239W, which translates into a yearly power loss of about 2.09KW·h. If the market price of electricity is 0.6 yuan/KW·h, the charger’s annual electricity bill It’s about 1.254 yuan.The no-load power consumption of
110V at 60Hz is 0.089W. After conversion, the electric energy lost in one year is about 0.77KW·h. If the market price is 0.6 yuan/KW·h, the annual electricity bill of the charger is about 0.462 yuan.
Conversion efficiency test
The charger is essentially a conversion device, and there will be losses in the process, which are emitted in the form of heat. We usually look at the parameters on the charger. Output 100W or 65W is the maximum output power the charger can provide for the device, but the power the charger draws from the socket is often larger. The following are two chargers at 220V 50Hz and 110V. Conversion efficiency tests were conducted under 60Hz AC input, and the test results are as follows.
The blue histogram is the vivo 120W gallium nitride charger. Under 220V 50Hz, test the charger at full output power at each voltage range: the input power at the AC end of the power strip and the output power at the USB end are measured at the five levels. Through calculation, the conversion efficiency of the charger can be obtained from ranging from 88.44% to 91.47%.
The yellow bar graph is the vivo 120W charger. Under 220V 50Hz, test the charger at full output power at each voltage range: the input power at the AC end of the power strip and the output power at the USB end are measured at the five levels. Through calculation, the conversion efficiency of the charger can be obtained from It ranges from 83.93% to 89.79%.
Let’s look at the 110V/60Hz mains power environment. Under 110V 60Hz, the conversion efficiency of vivo 120W gallium nitride charger ranges from 88.9% to 90.2%; the conversion efficiency of vivo 120W charger ranges from 85.12% to 88.74%. .
Summary
The conversion efficiency can reflect the quality of the charger. From the data point of view, the higher the percentage, the better. As can be seen from the above test data, the efficiency of the two chargers at multiple power outputs reaches about 88%, and the output efficiency of some gears even reaches 91%. The high-power fast charging of Lenovo charger is aimed at charging laptops and mobile phones. The most intuitive feeling for users is that charging is efficient and the heat generation is naturally low.
Ripple test
Since the charger uses switching power supply , the secondary output of the transformer is not direct current . It needs to be output through rectification and capacitor filtering, that is, there will be ripples in the charger output. Charging Head Network uses oscilloscope to test the ripple value output by the charger, compare it with national standards, and detect the output quality of the charger. The lower the ripple, the higher the quality of the charger's output.
ripple test is divided into two types: no-load (the Y-axis current in the histogram is 0A) and heavy load (the Y-axis current in the histogram is non-0A). The blue histogram is the vivo 120W gallium nitride charger. In the no-load part, under 220V 50Hz AC input, the charger has the highest ripple when it is in the 5V0A no-load state, which is 40mVp-p; when it is in the 15V0A no-load state, the ripple is the lowest, which is 24mVp-p.
The yellow bar graph is the vivo 120W charger. In the no-load part, under 220V 50Hz AC input, the charger has the highest ripple at 9V0A no-load state, which is 48mVp-p; and the lowest ripple at 20V0A no-load state, which is 28mVp-p.
Let’s look at the 110V/60Hz mains power environment. The blue histogram is the vivo 120W gallium nitride charger. Under 110V 60Hz AC input, the charger has the highest ripple at 5V0A no-load state, which is 38mVp-p; and the lowest ripple at 20V0A no-load state, which is 18mVp-p.
The yellow bar graph is the vivo 120W charger. Under 110V 60Hz AC input, the charger has the highest ripple at 38mVp-p when it is in the 5V0A and 12V0A no-load states; the lowest ripple is 30mVp-p when it is in the 20V0A no-load state.
The following is the ripple test data of the two chargers under heavy load.
The blue histogram is the vivo 120W gallium nitride charger. In the heavy load part, under 220V 50Hz AC input, the charger has the highest ripple at 104mVp-p when it is in the 5V3A output state; and the lowest ripple is 52mVp-p when it is in the 15V2A output state.
The yellow bar graph is the vivo 120W charger. In the heavy load part, under 220V 50Hz AC input, the charger has the highest ripple at 100mVp-p when it is in the 9V3A output state; and the lowest ripple is 50mVp-p when it is in the 20V3.25A output state.
Let’s look at the data under 110V/60Hz mains power. The blue bar graph is the vivo 120W gallium nitride charger. Under 110V 60Hz AC input, the charger has the highest ripple when it is in the 5V3A output state, which is 82mVp-p; when it is in the 15V2A output state, the ripple is the lowest, which is 42mVp-p.
The yellow histogram is the vivo 120W charger. Under 110V 60Hz AC input, the charger has the highest ripple at 9V2A output state, which is 82mVp-p; and the lowest ripple at 48mVp-p when it is at 20V3.25A output state.
Summary
The lower the ripple value, the higher the output quality of the charger. Judging from the test data, the ripple values of both chargers are at a low level, indicating that the output quality of the chargers is very good.
charging head network summary
compares the vivo 120W gallium nitride charger with the vivo 120W charger. The appearance follows the family-style white glossy design, using a white flame-retardant material shell with rounded edges; only the configured USB interface is different, actual measurement The performance is also different under the same test scenario environment.
In terms of performance, the 120W gallium nitride charger adds QC4 and PPS to the fast charging protocol compared to the 120W charger, which can meet the fast charging of various technical schools, and intelligent charging adjustment is safer. Under 220V50Hz mains power, the standby power consumption of the gallium nitride charger is lower; the conversion efficiency of the 120W charger is around 88%, while the 120W gallium nitride charger is around 90%; although the interface configuration is different, actually measured iQOO 9 The Pro battery takes the same amount of time from 0 to 100%, with no difference.
uses a ripple test to demonstrate the quality of the charger. Taking into account the differences in international mains power, two voltages, 220V50Hz and 110V60Hz, are tested. In the no-load state and the heavy-load state, the two are at different voltage levels, and the ripple values have different degrees. of the lead.
The overall measured difference between the two vivo chargers in terms of appearance and charging performance is small. In actual use, the equipment is charged with the original wires and takes the same time. However, the output quality of the gallium nitride charger that supports the PPS protocol is better. More stable; the biggest difference lies in the interface, size and weight. Considering the aspects of portability and equipment upgrading, the vivo 120W gallium nitride charger is more recommended, but the charger that suits your usage habits is suitable for you. .
