In recent years, the fast charging power of the flagship mobile phone has been increasing. At present, the fast charging power of the flagship mobile phone has reached the level of 120W, which has been increased by more than 20 times compared with the familiar Wufu Yian. This issue compares the original 120W charger of Xiaomi 10 supreme commemorative edition and the space customized 120W gallium nitride fast charge released by the recently released Black Shark 5 mobile phone at the same time.
Among them, Xiaomi 10 supreme commemorative edition was released in 2020 and black shark 5 mobile phone was released in 2022. By comparing the two chargers, we can understand the evolution of fast charging in more than a year and the process of localization and substitution.
Product appearance packaging
The previously disassembled Xiaomi 120W charger is attached to Xiaomi 10 supreme commemorative mobile phone and has no packaging. Therefore, the packaging drawing for comparison is displayed in Xiaomi's official mall and continues the classic style design. The 120W charger of black shark belongs to a joint brand. Both the packaging and the appearance design of the charger set are full of science fiction.
Size / power density
The measured three-dimensional of Xiaomi 120W charger is 63.69 60.44 28.34mm, and the power density is about 1.36w/cm ³； The measured three-dimensional of black shark 120W charger is 60.46 59.85 30.86mm, and the power density is about 1.07w/cm ³。
Interface
Xiaomi 120W charger and black shark 120W charger are equipped with magic modified usb-a interface, and the front end of the tongue has special contacts. Both chargers with their original wires can support 65W PD fast charging.
Nameplate
The nameplates of both chargers are printed on the input housing.
Xiaomi 120W charger parameters:
Model: mdy-12-ed
Input: 100-120v ~ 50 / 60Hz 1.7A
Output: 5v3a, 9v3a, 11v6a, 20v4 8A
Input: 220-240V ~ 50 / 60Hz 1.7A
Output: 5v3a, 9v3a, 11v6a, 20v6a
Manufacturer: Shenzhen Hangjia Chiyuan Electric Co., Ltd
The charger has passed 3C certification and QC3 0 certification
Parameters of black shark 120W charger:
Model: bg04
Input: 100-120v ~ 50 / 60Hz 1.7A
Output: 5v3a, 9v3a, 11v6a, 20v4 8A
Input: 220-240V ~ 50 / 60Hz 1.7A
Output: 5v3a, 9v3a, 11v6a, 20v6a
Nanchang Black Shark Technology Co., Ltd
The charger has passed CCC certification and QC3 0 certification
weight
The weight of Xiaomi 120W charger is about 184g, and the weight of black shark 120W charger is about 176g.
Front layout of internal structure
Both chargers adopt the thermal conductive silica gel potting process to provide the charger with enhanced heat dissipation performance and weather resistance, and the glue filling can also improve the heat capacity of the charger, absorb the heat of high-speed fast charging, and evenly distribute it through the shell. Glue filling absorbs heat + large-area heat dissipation to reduce the temperature rise of fast charging in a short time.
The two chargers look similar in layout, and the front looks different in the positions of input filter and PFC boost inductor, because the two chargers adopt different designs. Xiaomi 120W charger chooses to weld the primary switch tube and synchronous rectifier tube on the circuit board of the plane transformer, and the plane transformer is longer. Black Shark 120W charger welds small plates at both ends of the plane transformer, and welds circuits such as primary switch tube and synchronous rectifier tube. The transformer is short, which is conducive to the overall design.
Back Layout
The layout of the two chargers is similar from the back. They both use three optocouplers for feedback and protection functions, but the black shark charger uses patch y capacitor instead of traditional plug-in y capacitor, which has higher space utilization. In addition, it can be seen from the back of the PCB that the plane transformer is welded to the PCB through two small plates. The process is relatively complex, but the space utilization rate is higher.
PFC boost controller for working materials
The output power of both chargers exceeds 75W, so they are equipped with PFC power factor correction circuit. Xiaomi 120W charger uses Ti Texas Instruments ucc28056 PFC controller, which operates in critical mode and has ultra-low no-load power consumption. Black Shark 120W charger uses silijie sy5072b PFC controller, which is also in critical mode. It operates with constant conduction time. The built-in boost converter adopts quasi resonant switch to obtain high efficiency and optimize EMI performance.
Primary controller
Both chargers adopt ansenmey ncp1342 high-frequency flyback controller, with built-in x2 capacitor discharge and high-voltage start. The chip has multiple perfect protection functions, which is also widely used in other chargers.
Synchronous Rectifier Controller
The synchronous rectifier controllers of the two chargers are from MPs, and the model is mp6908a. It is also one of the widely used synchronous rectifier controllers. The synchronous rectifier controller supports 600kHz switching frequency, high side and low side applications, and synchronous rectifiers with standard driving voltage and logic driving voltage.
Protocol chip
Both chargers use Weiquan wt6633p protocol chip, which is one of the few PD controllers certified by Qualcomm qc4 and qc4 +, with built-in usb-pd physical layer, type-C cable detection, built-in voltage regulator, voltage and current monitoring function and load switch control.
PFC boost switch
The PFC switch tube of Xiaomi 120W charger adopts st Italian method stl24n60m6, NMOS, withstand voltage 600V, conduction resistance 209M Ω, and adopts powerflat 8 8 HV package, which is similar to the common dfn8 8 package.
The PFC switch tube of black shark 120W charger adopts nano semiconductor nv6136a gallium nitride power chip, with built-in 650V withstand voltage and 170m Ω conductive gallium nitride switch tube. It supports lossless current sampling, smaller volume and higher efficiency.
Primary switch tube
The primary switch tube of Xiaomi 120W charger adopts st Italian method stl24n65m2, NMOS, withstand voltage 650V, conduction resistance 0.25 Ω, which is the same as PFC switch tube package.
The primary switch tube of black shark 120W charger comes from semihow semiconductor, model hcfl70r360, withstand voltage 750V, conduction resistance 345m Ω, and is packaged in dfn8 * 8.
Synchronous rectifier
The secondary synchronous rectifier of Xiaomi 120W charger adopts Toshiba tph4r50anh, NMOS, withstand voltage of 100V and conductivity of 3.7m Ω. The secondary synchronous rectifier of black shark 120W charger adopts Weizhao semiconductor vsp003n08hs-g, NMOS, withstand voltage of 80V, conductivity of 2.4m Ω and pdfn5060x package.
capacitance
The high-voltage filter capacitors of the two chargers are welded on the vertical small plate to make full use of the internal space of the charger. Xiaomi 120W charger uses two Aishi Aihua electrolytic capacitors with the specification of 400V 56 μ F. Two in parallel, 112 in total μ F。 Black Shark 120W charger uses two samxon three letter electrolytic capacitors internally, with a specification of 33 μ F 420v, two in parallel, 66 in total μ F。
The output filter solid-state capacitors of the two chargers are from polycap Berek, RF series 105 ℃ 5000 hour long-life solid-state capacitors, 820 μ F 25V, meeting the filtering requirements of 20V output.
Product performance agreement
The compatibility protocols of Xiaomi 120W charger and black shark 120W charger measured by chargerlab power-z kt002 are the same, and both support QC2 0/3.0、PD3. 0 fast charging protocol.
PDO
PDO message shows that the two chargers have the same voltage gear: 5v3a, 9v3a, 15v3a and 20v3 25A。
Charging head network Summary
Finally, the two charger forms of Xiaomi and black shark are attached to facilitate you to compare the differences between products.
The appearance of Xiaomi 120W and black shark 120W chargers is quite different. By observing the information of the charger, we can see that Xiaomi 120W charger is OEM by Hangjia. Both chargers are PFC + flyback architecture. Ti Texas Instruments ucc28056 PFC controller is built in Xiaomi 120W charger, and silijie sy5072b PFC controller is built in black shark 120W charger.
The internal structure of the two chargers is very similar, and the biggest difference is the design of plane transformer. Xiaomi 120W charger uses a long plane transformer, and the primary switch tube is welded on the transformer PCB. Black Shark 120W charger welds vertical small plates at both ends of the plane transformer to arrange the primary circuit. Both chargers use Weiquan protocol chip, and the black shark 120W charger uses the synchronous rectifier of Weizhao semiconductor. Black Shark charger adopts silicon Lijie PFC controller and synchronous rectifier of Weizhao semiconductor, which realizes the substitution of imported devices.