The charging head network got the 90W dual USB-C charger launched by DBK Dibuco, this charger uses a silver square shell and is equipped with national standard folding pins, which is convenient for storage and carrying. The charger supports a 100-240V global wide voltage input, and the output terminal is equipped with two USB-C ports and a power indicator.
Both USB-C ports of the charger support 90W PD fast charging, support power blind plugging, and have 30+60W and 45+45W automatic power distribution, which can meet the simultaneous charging needs of mobile phones and computers. Let's bring the dismantling of Dibico's 90W charger, and take a look at the internal scheme and materials.
Dibuco's 90W charger adopts a square shape design, the corners of the fuselage are rounded, and the surface of the shell is sprayed with silver-gray metallic paint, the whole style is simple, but the texture is full.
The side of the fuselage is printed with charger parameter information.
Close-up of charger parameters.
Model: USB-155PD-H-CN
Input: 100-240V 50 60Hz 2A (Max).
Output: 5V3A, 9V3A, 12V3A, 15V3A, 20V45a（90w max）
USB-C1+USB-C2: 45W+45W or 30W+60W (90W Max).
Manufacturer: Shenzhen Dibuco Electronic Technology ***
The charger is CCC certified.
The double-wing design is added to the side of the corresponding prongs, which can improve the stability of the product when used, and the details are exquisitely designed.
The charger is equipped with foldable national standard prongs, which is easy to store and carry.
The output is equipped with indicator lights and dual USB-C ports.
The measured height of the charger body is 6511mm。
The width is 6502mm。
The thickness is 3143mm。
Feel the size of the charger in your hand.
In addition, the net weight of the product was measured to be about 199g.
When powered on, the charger indicator lights up blue.
Using the ChargerLab Power-Z KM003C, the USB-C1 port supports PD30. DCP charging protocol.
PDO packets show that the USB-C1 port also has 5V3A, 9V3A, 12V3A, 15V3A, and 20V45A five groups of fixed voltage ranges.
It was measured that the USB-C2 port is compatible with the same protocol as the USB-C1 port.
In addition, PDO packets are also measured. That is, the output performance of the two USB-C ports is the same, and it supports power blind plugging, which is convenient for daily use.
After reading the unboxing and testing of this 90w charger of Dibico, let's disassemble it and take a look at the internal scheme and materials of the charger.
First, disassemble the charger housing along the housing seams.
A pink thermal pad is pasted on the inside of the housing.
Compatible with transformer and PFC step-up inductor gluing to enhance heat dissipation.
Remove the PCBA module from the housing.
Close-up of the light guide post corresponding to the indicator light inside the housing.
The edge of the PCBA module is insulated with adhesive tape.
Attach a thermal pad on the back of the PCBA module.
The AC input wires are connected by soldering.
The length of the PCBA module measured by vernier calipers is about 616mm。
The width of the PCBA module is about 603mm。
The thickness of the PCBA module is about 255mm。
The front of the PCBA module is at a glance, the upper left corner is the AC input, soldering fuse, common mode inductor, safety X2 capacitor and filter inductor. The lower left corner is welded with PFC boost inductor, two high-voltage filter capacitors are welded in the middle position, a transformer is welded on the right side and one transformer is welded up and down, and the right side is welded with a filter solid capacitor and an output small board, and the back of the output small board is insulated with a Mylar sheet.
The upper left corner of the back of the PCBA module is welded with the PFC boost chip, the right side is welded with the PFC rectifier tube, and the bottom is welded with two rectifier bridges. Two highly integrated power chips are welded on the right side, the corresponding synchronous rectifier tube, and an optocoupler is welded in the upper right corner.
Through the observation of the PCBA module, it is found that the built-in PFC circuit of this charger will boost the input voltage and correct the power factor. It is equipped with two flyback switching power supplies, with a wide voltage range output, and the output voltage is controlled by the protocol chip to achieve dual-port independent fast charging output. When there is only one interface output, the two power outputs are automatically connected in parallel to meet the high-power output requirements. Let's start with the input to understand the information of each component.
The input terminal is welded with a fuse, a common mode inductor, a safety X2 capacitor and a filter inductor, and the PFC boost inductor on the right side is tightly wound with tape insulation.
The input fuse is from Better Electronics, the discharge number is 932, and the specification is 5A 250V.
Common mode inductors are wound with enameled wire and insulated wire.
The two safety x2 capacitors are from Dongguan Chengxi, and the specification is 022μf。
Close-up of magnetic ring filter inductor, enameled wire glued and fixed.
The two rectifier bridges are from Diodes, model TT8M, specification is 8A 1000V, connected by two half-bridges, and the heat is evenly shared.
The thin-film filter capacitor is rated at 1 F450V.
The PFC boost controller is from PI, is the HiperPFS-4 series, model PFS7628C, with an integrated 600V MOSFET, which provides high power factor and high efficiency under various load conditions, and has 110W output power at 90VAC input voltage.
The PFC boost inductor is wound with an ATQ2516 core.
The PFC rectifier is from PI, model LXA03D530, which is a QSPEED series very low reverse recovery diode, with a withstand voltage of 530V, a current of 3A, and an SO-8C package.
The two high-voltage filter capacitors are from Fengbin, both with a specification of 33 F450V.
The main control chip of the switching power supply adopts PI INN3368C, which is the Innoswitch3-Pro series, which is a CNC constant voltage constant current offline flyback quasi-resonant switch IC that integrates high-voltage switching, synchronous rectification and FluxLink feedback function, with a very high degree of integration, suitable for high-efficiency USB PD 30+PPS QC adapter, under the condition of wide voltage range, it can output 50W power in the closed housing, and can output higher power when used with PFC.
The other power supply main control chip also uses the INN3368C main control chip.
The filter capacitor that supplies power to the main control chip is 47μf100v。
The transformer is made of ATQ2516 skeleton, the secondary stage is wound with multi-layer insulated wire, and the magnetic core is tightly wound with tape insulation.
The blue Y capacitor is from STE Matsuda Electronics.
Everlight EL1018 optocoupler is used for PFC switch control.
The synchronous rectifier tube is from Wanguo Semiconductor, model AON6220, NMOS, withstand voltage 100V, conduction resistance 51m in DFN5*6 package.
The other synchronous rectifier tube is of the same model.
The output is equipped with a filtering solid-state capacitor and a protocol board.
The output filter capacitor is from Yongming, NPX series solid capacitor, with a specification of 1000 F25V.
Two protocol chips, four VBUS switches and two USB-C receptacles are welded on the front of the board.
The TVS diode is welded on the back of the small board for electrostatic protection.
The protocol chip adopts Yingjixin IP2726, which is a very widely used protocol chip. Yingjixin IP2726 is a fast charging IC that integrates multiple protocols and is used for USB output ports, supporting Type-C DFP and PD20/3.0、pps、qc4+、qc2.0/3.0、fcp、afc、scp、mtk pe+、apple2.4a、bc1.2 as well as protocols such as Samsung 2A. With high integration and rich functions, only a few peripheral components are required in the application, which effectively reduces the size of the overall solution and reduces the BOM cost.
Charging head network learned that Yingjixin IP2726 has passed Qualcomm QC4+ certification and obtained the first QC4+ certification certificate in Chinese mainland.
The charging head network has learned that Yingjixin IP2726 has previously been used by big brand products such as Bull 140W 3C1A GaN fast charging socket, MOMAX 140W 2C1A GaN charger, Mophie 120W 3C1A four-port GaN desktop charger, Redmi Note12 Explorer Edition original 210W GaN charger, Lenovo ThinkPlus mini 65W GaN charger and other big brand products, and the performance quality of the chip has been highly recognized by customers.
VBUS switch is from Wanguo Semiconductor, model AONR36366, NMOS, withstand voltage 30V, conduction resistance 28M, in DFN3*3EP package.
Another close-up of the same model VBUS switch tube, a total of four are used for interface output and power supply parallel control.
The USB-C receptacle is fixed by via soldering, and the black rubber core does not expose copper.
SMD LED indicator is used for power indication.
A list of all dismantling and a family photo.
This 90w charger from Dibeco has a silver plastic case and is equipped with GB folding pins, which is small and portable and easy to carry. The charger supports 100-240V global wide voltage input, and the output is equipped with two USB-C ports. Any of the interfaces supports 90W output power and supports power blind mating. It also supports automatic power distribution, which can meet the fast charging needs of mobile phones and laptops at the same time.
Through the dismantling of the charging head network, it is learned that the charger of Dibuco adopts a PI high integrated power supply scheme, using PFS7628C PFC controller with LXA03D530 PFC rectifier tube, and the flyback switching power supply is composed of two INN3368C with dual transformers. The output is controlled by two Yingjixin IP2726 protocol chips for two USB-C interfaces.
The internal high-voltage filter capacitor of the charger comes from Fengbin, and the output filter capacitor comes from Yongming. The synchronous rectifier and VBUS switch are both from IWC. The PCBA module is glued and thermally conductive, and the double-sided thermal pad is pasted to strengthen heat dissipation, reduce the temperature rise of long-term high-power operation, and the internal workmanship materials are solid.