preface
Recently, the charging head network got an original 65W charger for Asus notebooks, this charger has a simple design, comes with a USB-C output cable, is small and easy to use, has a PD fast charge output, and the output power is 65W. The charger adopts the national standard fixed pin and has its own design of 2 meters long cable, which is suitable for fixed use in the office or home.
The output power of 65W can meet the daily use needs of notebook computers, and can also meet the fast charging needs of high-power mobile power banks. The following charging head network will disassemble this charger, look at the material and design of Asus's 65W charger.
Asus ROG65WPD fast charge appearance
The charger comes with its own USB-C output cable, which is already the third Asus ROG phantom series laptop adapter with the charging head network disassembly, and the design style is exactly the same.
The charger is equipped with fixed national standard pins, the fuselage is still a square shape, the four ends of the arc transition, the front and back combined with the Asus phantom series of laptop "point" element design, the lower left corner also has a 65W word, indicating that the charger supports 65W fast charging.
Charger parameters are printed on the side housing
Model: AD2129520
Input: 100-240V~50/60HZ 1.5A
Output: 5V3A, 9V3A, 15V3A, 20V3.25A 65W
Manufacturer: Boyi Electronics Co., Ltd
The charger has passed CCC certification, China energy saving certification and VI energy efficiency certification.
The output cable is bent.
The other pair of cables is designed with locking buckles for easy handling and carrying, and the mold shell of the cable head is easy for users to plug and unplug.
The measured charger body height was 63.18mm.
The width is 63.06mm.
The thickness is 28.56mm.
The length of the measured USB-C output cable is about 197cm.
The size of the charger held in the hand is intuitive.
The weight is about 216g.
The charger measured using the ChargerLAB POWER-Z KT002 only supports the PD3.0 fast charging protocol.
It also has four fixed voltage levels of 5V3A, 9V3A, 15V3A and 20V3.25A
ASUS ROG65W PD fast charge disassembly
After having a basic understanding of the Asus ROG 65W charger, the following continues to disassemble it in detail to see how the actual workmanship material of the product is.
The housing is first disassembled along the seams of the housing, the circuit board is connected to the pins by red and black wires, and the circuit board component surface is covered with an aluminum heat sink.
The cold-pressed terminals of the input wire are soldered to the PCB and the other end is soldered to the pins.
The output wires are also cold-pressed terminal welded, and the jacket heat shrinkable tube is insulated. Where the white line is the output positive pole, the black line is the output negative pole, and the thin blue line behind the black line is the CC line.
The PCB length was measured to be 57.1mm using a vernier caliper.
The PCB width is 53.1mm.
The PCB thickness is 24.2mm.
There is a black plastic sheet insulation between the heatsink and the PCB, and the heatsink is soldered to the PCB.
Soldering removes the aluminum heat sink, removes the black insulating plastic sheet, and glues the thermal insulation between the PCB and the heat sink.
The transformer and electrolytic capacitors in the charger are covered with a large area of glue.
The back of the PCB is also covered with very thick glue, which makes it more difficult to clean.
The front of the PCB module is listed, and in the upper left corner are the input fuse, EMI filter circuit, and rectifier bridge. Below is the primary filter capacitor, to the right of the capacitor is the primary switch, and the switch tube uses screws to secure the heat sink. Above the electrolytic capacitor is the transformer, and on the right side of the transformer is the output filter capacitor.
At a glance on the back of the PCB module, the primary division is obvious. Asus's 65W charger uses flyback architecture, wide voltage output, and the charger output voltage is controlled by the protocol chip according to the needs of the device. Let's start with the inputs to understand each device.
The input side is listed, followed by fuse, first stage common mode inductor, X capacitor, second stage common mode inductor, rectifier bridge.
The input of the power supply enters the power supply through the fuse to protect against overcurrent. The delay fuse is from Bate Electronics, discharge number 932, and the specification is 3.15A 250V.
The first stage of common mode inductors, magnetically surrounded, suppresses EMI interference, and one of the enameled wires is coated with a red sleeve to reinforce the insulation.
Safety X capacitor with a capacitance of 0.47μF.
The second common-mode inductor uses a green magnetic surround system.
The AC input is sent to the rectifier bridge through the EMI circuit, and the rectifier bridge is rectified into a pulsating DC current. The rectifier bridge is from PY Pingwei, the model is GBP610, 6A 1000V specifications.
The pulsating DC after rectification is filtered into DC by electrolytic capacitors.
Electrolytic capacitors from Lelon Electronics, RXR series small volume electrolytic capacitors, specifications of 420V 120μF, heat resistance 105 °C.
PWM master chip from RICHTEK Likon, RT7791. Integrated voltage regulator inside the chip, support 10-40V power supply, support adaptive overcurrent protection, support adaptive loop gain control for improving loop stability, green mode operation under light load and no load, and external NTC in the upper right corner for overtemperature protection, support for comprehensive protection functions, suitable for USB PD charger.
The primary switch tube adopts Dongwei OSG65R380FF, GreenMOS series, NMOS, withstand voltage 700V, conductive resistance 380mΩ, and adopts TO220F insulated package.
The transformer is insulated with horse tape wound and the top is coated with thermal adhesive and a heat sink is used to dissipate heat.
Optocoupler for feedback to regulate output voltage, screen print K1018.
The Y capacitor spans between primary and secondary.
Blue Y capacitor close-up, from Murata.
Synchronous rectifier controller silk screen printed TWZ, SOT23-6 package.
Synchronous rectifier tubes from Dongwei, SFG10R12BF, NMOS, withstand voltage 100V, conductivity 12mΩ, in SO8 package.
The charger has a built-in protocol chip from Li Kun, model RT7202, which not only supports usb PD3.0 fast charging protocol, but also supports other proprietary fast charging protocols. An integrated MCU supports a wide range of operating voltages with built-in adaptive overvoltage, undervoltage protection, and programmable overcurrent protection.
Output VBUS switches from DIODES, DMN3009SSS, NMOS, 30V withstand, 5.5mΩ conductivity, in SO8 package.
Output filtering uses an AiSHi electrolytic capacitor in parallel with a Lilong solid capacitor.
AiSHi electrolytic capacitors are 25V680μF.
Lilong solid capacitors are OCRZ series small volume 105°C products.
The specifications are also 25V680μF.
All disassembled, let's take a family portrait.
Charging head net disassembly summary
Asus's 65W PD charger adopts a national standard pin and comes with a 2-meter-long output cable, which is more suitable for use in fixed places and is not suitable for daily carrying. The charger supports four sets of voltage gears of 5V3A, 9V3A, 15V3A, 20V3.25A, which can meet the needs of notebook charging while also taking into account mobile phone charging.
Through disassembly, the charging head network found that the internal design of asus 65W power supply is compact and the space utilization rate is high. The power supply adopts the switching power supply scheme of the cubic hammer, and the primary use of RT7791 switching power supply main control, supporting NTC temperature detection, with Dongwei GreenMOS OSG65R380FF switching tube. The synchronous rectifier tube adopts Dongwei SFG10R12BF, and the protocol chip is Likong RT7202. The internal use of Lilong and Aihua capacitors in the power supply, the overall material is solid and reliable.