With a ratio of 1A1C interface, Panasonic 30W fast charger disassembly

preface

Panasonic is a well-known home appliance brand, the launch of products covering many aspects of life, charging head network before the dismantling of Panasonic launched the USB-C fast charging Cube socket, today for everyone to bring is a 30W dual-port fast charging, support 1A1C output, and both interfaces support fast charging output, convenient mobile phone charging and traditional old-fashioned device charging. The following charging head network will disassemble this dual-port fast charge to see how the material workmanship of the product is.

Panasonic 30W fast charge out of the box

The box is colored in blue, white and black, and the front is printed with Panasonic Panasonic, charger exterior drawings, names, and selling point logos.

Charger parameters, manufacturer information, etc. are printed on the back.

The package contains a charger and instruction manual.

The charger adopts a classic straight board design, and the PC material white shell surface is frosted, which can effectively resist fingerprints and facilitate plugging and unplugging.

The center of the front of the fuselage is printed with the Panasonic logo.

Charger parameters are printed on the input housing

Model: QE-TMEX003C

Input: 100-240V~50/60HZ 0.8A

USB-A输出:4.5V5A、5V4.5A、9V3A、12V2.5A

USB-C输出:5V3A、9V3A、10V2.25A、12V2.5A、15V2A、20V1.5A

A+C total output: 5V5A

Manufacturer: Panasonic Appliances (China) Co., Ltd

The charger has been CCC certified as well as Class VI energy efficiency certification.

The charger is equipped with foldable GB plugs, which is easy to put away and easy to carry, and will not scratch other equipment in the bag.

USB-A is a purple rubber core, USB-C is a white rubber core, and the double lightning sign near the two interfaces indicates that fast charging is supported.

The measured charger body height was 50.86mm.

The width is 51.76mm.

The thickness is 27.23mm.

Compared with the Apple 30W charger, the volume is slightly smaller.

The size of the hand is intuitive.

The net weight of the charger is about 76g.

The USB-C port is measured using the ChargeLAB POWER-Z KT002 to support QC2.0/3.0, AFC, FCP, SCP, PE2.0, PD3.0, ppS fast charging protocol.

In addition, the PDO message shows that the C port also has five fixed voltage levels of 5V3A, 9V3A, 12V2.5A, 15V2A, 20V1.5A, and two sets of PPS voltage levels of 3.3-5.9V3A and 3.3-11V2.5A.

The USB-A port is measured to support QC2.0/3.0, AFC, FCP, and SCP fast charging protocols.

Panasonic 30W fast charge disassembly

After having a basic understanding of panasonic's charger, the following charging head network continues to disassemble it, let's take a look at the actual material workmanship of the charger.

Open the charger housing along the input cover and insulate the wire from the heat shrink tubing at the pin solder.

Remove the PCBA module inside the charger, and the transformer is tightly wrapped with insulating tape and fixed with glue.

The input wire solder joints are glued and reinforced.

The measured length of the charger motherboard was 35.5mm.

The width is 46.5mm.

The thickness is about 21mm.

At a glance on the front of the PCB, the capacitor and the transformer are glued and reinforced, the PCB has an isolation slot, and the isolation board is inserted between the primary and secondary components to strengthen the insulation.

At a glance on the back of the PCB, you can see that the primary adopts a highly integrated sealing chip, which greatly simplifies the primary circuit. The interface output voltage is controlled by white optocoupler feedback, and a protocol chip can be seen on the output side.

Through the analysis of the front and back circuits of the charger, panasonic 30W 1A1C charger adopts a closed primary chip to form a wide range of output flyback switching power supply, wide range output, output voltage through the protocol chip control, support single port fast charge, dual port 5V output. Below we start from the input to understand the information of each component.

At a glance at the charger inputs, the AC inputs are connected to a slow-melt fuse and an NTC thermistor.

Close-up of the slow melt fuse at the input, 3.15A 250V.

NTC thermistor close-up, the resistance in the cold state is large, used to suppress the inrush current when the charger is plugged in, reduce the spark when plugged in, and reduce the temperature resistance value after normal operation, reducing the impact on efficiency.

Common mode inductors are two-wire wound for filtering out EMI interference.

X capacitors are used to suppress differential mode interference and have a capacity of 0.1μF.

Output USB-C port welding small board vertical welding, USB-A port vertical welding. The rectifier bridge soldered by the small board can be seen in the gap between the USB-A and USB-C nulls.

After the input AC is filtered by the EMI circuit, it enters the rectifier bridge, which converts the ALTERNA into pulsating DIRECT CURRENT. Fairing bridge screen printing MB30M, smds welded on a small board, make full use of space.

The high-voltage filter electrolytic capacitors are all from y.u.g Yu optoelectrons, and both are 33μF 400V and 105°C heat-resistant. The pulsating DC current used to output the rectifier bridge is filtered into direct current to power the primary circuit.

Differential mode inductance, using I-core, jacket heat shrinkable tube insulation.

Switching power supply primary chip using Lishengmei LN9T27GDH, which is a built-in 680V switching power supply chip, using current mode control, with low standby power consumption, low cost and high performance advantages, standby power consumption as low as 50mW, built-in soft-start circuit can reduce switching shock, enhanced light load control optimizes the conversion efficiency, the chip built-in cycle-by-cycle current limit, support output overcurrent, overload and short circuit protection, support 45W power output.

LN9T27GDH Details.

At the same time, the charger also uses the Lishengmei LN3210 voltage regulator chip to provide a stable power supply for the LN9T27GDH chip.

Electrolytic capacitors powering the primary master chip, from Asia'x, are 4.7μF 100V.

Diodes and resistive capacitors used in RCD absorption circuits absorb transformer leakage inductance energy and reduce voltage stress on the switch tubes.

Close-up of the output side of the transformer, you can see the synchronous rectifier controller, output filter capacitor, transformer secondary output line glued fixed.

A close-up of the transformer, tightly wound using insulating tape, with silk screen information printed on the top.

Blue Y capacitor close-up.

Synchronous rectifier controller silk screen printing 6602, according to the secondary output voltage of the transformer, automatic output drive signal control synchronous rectifier tube conductor pass off, synchronous rectification.

Synchronous rectifier tube from Visco Semiconductor, VSP008N10MS, NMOS, withstand voltage 100V, support logic voltage drive, conductivity 6mΩ, available in PDFN5*6 package.

Wei Zhao VSP008N10MS data information.

Charging head network disassembly learned that the use of Weizhao VSP008N10MSC also has Miwu Zhenmiao 65W 2C1A gallium nitride charger, ASUS adol 65W gallium nitride charger, Nubia 65W deuterium feng three-port gallium nitride fast charger, Lenovo 65W PD fast charging matchbox power supply and other products, Weizhao MOS has also been recognized by Huawei, Xiaomi, Samsung, OPPO and many other well-known brands.

Output filter solid capacitor from Zhouyu Electronics, 470μF 25V, two in parallel. It has low ESR, high ripple current capability, and heat resistance of 105°C.

The protocol chip adopts Injixin IP2726, which is a fast charging protocol chip that integrates multiple protocols for USB output ports, and supports Type-C DFP, PD2.0/3.0, PPS, QC4+, QC2.0/3.0, FCP, AFC, SCP, MTK PE+, Apple2.4A, BC1.2 and Samsung 2A. With high integration and rich functions, it requires very few peripheral devices in the application, effectively reducing the size of the overall solution and reducing the BOM cost.

Charging head network learned that Yingji core IP2726 has previously been adopted by Motorola 68W gallium nitride charger, Nubia dabai 20W dual-port gallium nitride charger, AOHi 100W dual USB-C port gallium nitride fast charge, bull fast charge 86 panel, AUKEY 65W 1A1C gallium nitride fast charge charger and other products. In addition, other series of fast charging chips of Yingjixin have also been highly recognized by customers such as Xiaomi, Huawei, and Samsung.

CT1018 optocoupler for feedback regulation output voltage.

Close-up of the VBUS switch tube for USB-A and USB-C ports, from the AGMSEMI chip source, model AGM306A, NMOS, withstand voltage 30V, conductivity 5.8mΩ, available in DFN3*3 package.

Continue to solder the USB-C female seat platelet.

The USB-C female seat is welded to a vertical small board, fixed with vias, and a white rubber core.

The USB-A mother seat adopts purple rubber core, and the positive and negative poles are widened to support high-current fast charging.

All disassembled, let's take a family portrait.

Charging head net disassembly summary

Panasonic 30W dual-port fast charge adopts white shell, square shape design, equipped with folding pins and 1A1C dual-port output, both support 30W power, the configuration is mainstream. The charger supports a wide range of fast charging protocols, PD output supports 5V3A, 9V3A, 12V2.5A, 15V2A, 20V1.5A five sets of fixed voltage gears, as well as 3.3-5.9V3A and 3.3-11V2.5A two sets of PPS voltage gears, has a good compatibility for mobile phone fast charging.

The charging head network learned through disassembly that Panasonic's 30W fast-charging built-in Lishengmei switching power supply chip, the chip built-in switch tube, the peripheral circuit is simplified, and the integration is high. The charger synchronous rectifier tube adopts Weizhao VSP008N10MS, and the protocol chip adopts Injechi ip2726, which supports dual-port output. The primary filter capacitor comes from Yuguang Electronics, and the solid capacitor comes from Zhouyu Electronics, and the design and material are very good.