Disassembly report: Bull 65W 1A1C GaN charger

original Charging head network editorial department Charging head network

----- Disassembly Report of Charging Head Network Part 2677 -----

preface

Bull is a well-known fast charging brand. It has launched many USB-C fast charging sockets and GaN chargers before. Bull introduced a new type of 1A1C GaN charger. This charger has a long body, folded pin design, 1A1C interface, 65W fast charge output and automatic power distribution. Its parameters and appearance look no different from traditional chargers

However, compared with traditional chargers, Bull's GaN charger is fully equipped with automatic power-off function, which can automatically power off after the phone is fully charged, avoiding overnight charging of traditional chargers, eliminating potential safety hazards, and making it easier to use. The charging head network will disassemble the Bull's GaN charger to see the internal design and materials.

The charging head network has been disassembled before Bull 33W 1A1C fast charging car charging 、 Bull 65W PD fast charging charger 、 Bull 67W 3C1A GaN fast charging socket 、 Bull 67W 3C1A peak safety fast charging socket 、 Bull 65W 2C1A quick charging magic square socket And other products, welcome to check.

Bull 65W GaN charger unpacked

Bull brand, product name, appearance, 65W USB-C and GNV-AF1652 model are printed on the front of the packing box.

The back is printed with product selling points, technical parameters, address of Bull Group Co., Ltd., service hotline and other information.

A close-up of the technical parameters on the packaging box will be introduced in detail in the physical part of the product below.

Unpack the charger.

The long strip design of the charger gives a very thin and intuitive impression. The main body shell is sanded and the bright surface is color contrasted. The output end is equipped with a silver decorative plate.

The logo of BULL brand is printed on the waist of the charger.

Charger parameters are printed on the input housing

Product model: GNV-AF1652

Input: 100-240V~50/60Hz 1.7A

Output:

USB-C：5V3A、9V3A、12V3A、15V3A、20V3.25A

USB-A：5V2.4A、9V2A、12V1.5A

USB-C+USB-A：45W+18W

（USB-C：5V3A、9V3A、12V3A、15V3A、20V2.25A）

（USB-A：5V2.4A、9V2A、12V1.5A）

Manufacturer: Bull Group Co., Ltd

The charger has passed CCC certification.

The charger is equipped with foldable national standard pins.

The output end is equipped with 1A1C dual output interface, and the rubber core is blue.

The measured length of charger body is 75.02mm.

The width is 32.93mm.

The thickness is 32.91mm.

Compared with Apple 61W charger, it has obvious volume advantage.

The size of the charger is intuitive.

In addition, the measured net weight of the charger is about 113g.

use ChargerLAB POWER-Z KM003C It is measured that the USB-C interface supports the charging protocols of FCP, SCP, AFC, QC3.0, SFPP, PD3.0, DCP, and SAM 2A.

And PDO message shows that the interface also has five groups of fixed voltage gears: 5V3A, 9V3A, 12V3A, 15V3A, 20V3.25A.

It is measured that the USB-A interface supports the charging protocols of FCP, AFC, QC3.0, SFPP, DCP and SAM 2A.

Disassembly of Bull 65W GaN Charger

After seeing the unpacking and testing of Bull's Gallium Nitride Charger, we will take a look at the internal materials and design.

First, disassemble the charger shell along the shell seam, and connect the folding pin with the spring through the wire.

The PCBA module is filled with glue as a whole to improve the weather resistance, heat dissipation and mechanical strength of the charger.

Cold pressing terminal of pin lead and welding connection.

The length of PCBA module measured with vernier caliper is about 60.6mm.

The width is about 26.8mm.

The height is about 27mm.

Clean up the potting glue, weld three small plates on the front of the PCBA module, respectively weld the input filter capacitor, USB-C mother seat and USB-A mother seat. The left side of the PCBA module is welded with a high-voltage filter capacitor, the middle is a transformer, and the right side is a small interface board, where components such as the mother seat and filter capacitor are welded.

The back is welded with the main control chip of the switching power supply, the GaN switch tube, the feedback optocoupler and the SMD Y capacitor.

The left small plate is welded with rectifier bridge and filter capacitor, and the right small plate is welded with synchronous voltage rise and fall circuit for USB-A interface output.

Through the observation of PCBA module, it is found that Bull's GaN charger adopts QR switching power supply design, with wide voltage range output, the output voltage is controlled by the protocol chip, USB-C interface output is achieved through optocoupler feedback, and USB-A interface achieves fast charging output through voltage rise and drop circuit. Now let's start from the input end to understand the information of each component.

List of charger input terminals, welding fuse, NTC surge suppression resistor, common mode inductance, safety X2 capacitor and high-voltage filter capacitor.

The fuse is from Huade Electronics, with the specification of 3.15A 250V.

The black NTC surge suppression resistor is used to suppress the power on surge current.

Common mode inductance is wound with insulated wire and enameled wire, and insulated support is welded at the bottom.

The safety gauge X2 capacitor is from STE Matata Electronics, and the specification is 0.1 μ F。

High voltage filter capacitor and differential mode inductance are welded on the small side plate.

The other side is welded with two rectifier bridges, high-voltage startup and X2 capacitor discharge circuit.

Two rectifier bridges from Yangjie Electronics, model YBS3010, specification 3A 1000V, are connected by two half bridges to generate heat evenly.

One of the high-voltage filter capacitors is from emerald, and the specification is 400V 39 μ F。

The differential inductance is insulated by tape winding.

The other high-voltage filter capacitor has the same specification.

There is also a filter capacitor from JSH Wanjingyuan, with the specification of 400V 27 μ F. The total capacity of filter capacitor is 105 μ F。

The primary main control chip is JW1515HA, which is a high frequency QR GaN controller. It works in the quasi resonant mode. It is packaged with SSOP10, and its frequency is limited to 170kHz. The chip uses negative pressure current sampling, has accurate 6V driving voltage, and can directly drive GaN devices. It supports 7.5-90V wide voltage power supply, and can meet wide voltage output without external voltage stabilization and the second auxiliary power supply winding, effectively saving space.

JW1515HA information.

The switch tube, INN650D150A, is a 650V GaN high-voltage single tube from Innosec, with a transient withstand voltage of 750V and a conductivity of 150m Ω. It is packaged with DFN8 * 8. The INN650D150A supports ultra-high switching frequency, has no reverse recovery charge, has extremely low grid charge and output charge, meets the industrial application requirements of JEDEC standards, has built-in ESD protection, and complies with RoHS, lead-free, and EU REACH regulations.

The INN650D150A supports AC-DC, DC-DC converter applications, totem pole PFC applications, fast battery charging, high power density and energy efficiency conversion applications.

After disassembling the charging head network, it was learned that the GaN switch tube of InnoSecco was also association 、 Anke 、 Lvlian 、 Beisi 、 Flashover pole 、 Nubia 、 Meizu 、 mophie 、 Momax 、 Toulas 、 Philips 、 Black Shark The chip application has gradually expanded from mobile phone fast charging to mobile phone internal and automotive laser radar fields, and the chip quality has been widely recognized by the market.

The filter capacitor supplied by the main control chip is from emerald, and the specification is 100V 4.7 μ F。

The transformer core shall be covered with plastic shell and tightly wrapped with adhesive tape for insulation.

The SMD Y capacitor comes from Sichuan Teruixiang Technology Co., Ltd., which has the characteristics of small size and light weight, and is very suitable for use in high-density power products such as GaN fast charging. The part number is TMY1681M.

Teruixiang focuses on the R&D, production and sales of passive components, with a registered capital of 100 million yuan. It has two independent capacitor brands: SMD TRX and DIP TY capacitors. TRX will devote itself to the research of ceramic materials to expand the application of more categories and provide customers with more solutions.

The charging head network has learned that the Y capacitor of Teruixiang chip is not only Bestwald QC5 certified 100W GaN fast charging 、 Maiduoduo 100W gallium nitride 、 OPPO 65W Super Flash Charging Gallium Nitride Charger 、 Lenovo 90W GaN Fast Charge 、 Nubia 65W GaN Charger 、 Beisi 120W GaN+SiC PD fast charging charger Besides dozens of high-power chargers, it can also be used in Land and sea communication 、 First Guard 、 Belkin 20W mini quick charge of other brands, Performance is unanimously recognized by customers 。

Yiguang EL1019 optocoupler is used for output voltage feedback regulation.

The synchronous rectification controller is from Jewart, silk screen JWEWJ, model JW7726B, which supports CCM, DCM, QR and ACF modes, and can effectively prevent the wrong opening of synchronous rectification MOSFET during ringing; It shall have quick shutdown capability to be compatible with CCM; It can effectively prevent the gate gate from being coupled to the opening voltage during the startup process (before the VCC is established), support the high side and low side synchronous rectification applications, and be flexible in use.

The JW7726B has low static current, and the output voltage detection function is used for automatic switching power supply. When the output voltage is higher than 4.6V, it is powered by the output voltage to reduce the loss on the voltage regulator. When the output voltage is lower than 4.5V, the power is supplied by the switch pin. JW7726B adopts SOT23-6 packaging, and peripheral devices are simplified.

It was learned from the disassembly of the charging head network that the JW7726 was also Elambo 10000mAh two in one 60W gallium nitride fast charging 、 Ruiyuan Industrial 33W 1A1C GaN Fast Charge 、 REMAX 30W GaN Charger And other products.

The synchronous rectifier tube is from Ping Wei, model PW042N10ESL, and is packaged with DFN5 * 6.

For the list of output terminals, weld the small USB-A bus base plate and the small USB-C bus base plate, and weld the filter capacitor between the two small plates.

Two output filter capacitors are from Fengbin, PT series solid capacitor, with specification of 470 μ F 25V。

List of small USB-C interface boards, welding USB-C mother, VBUS switch tube and anti overshoot protection chip.

The other side is welded with protocol chip, current detection resistor and VBUS switch tube.

The protocol chip used for USB-C interface is Zhirong SW2303, which is a highly integrated multi protocol fast charging solution that supports USB-C and USB-A interface applications, mainstream fast charging protocols such as PD, QC, FCP, high and low voltage SCP, AFC, SFPP and PE, and supports optocoupler feedback and FB feedback.

SW2303 integrates CV/CC control loop, Type-C interface logic, fast charging protocol controller, and various safety protection functions. Cooperate with AC-DC or DC-DC and a few peripheral components to form a complete high-performance Type-C/Type-A fast charging solution.

SW2303 also supports I2C interface, internal integrated discharge function, NMOS/PMOS VBUS switch tube, and dynamic power distribution to meet the use of multi port charger. The chip supports external NTC for overheating protection to achieve comprehensive protection functions.

Zhirong Technology, an intelligent overcharge protection chip, automatically closes the output path after detecting that the device is pulled out or full, and automatically opens the output path when the device is reconnected, which can effectively ensure that the device is full and prevent overcharge.

Zhirong science and technology information.

One VBUS switch tube is from Ruijun Semiconductor, RUH4040M2, a 40V withstand NMOS with a conductivity of 6.8m Ω, and is packaged with PDFN3333.

The other VBUS switch tube, NCE30P20Q, is a 30V withstand PMOS, with a conductivity of 11.5m Ω, and is packaged with DFN3.3 * 3.3.

There is also a VBUS switch tube silk screen Q30N03.

The USB-C mother seat is fixed by via welding, and the blue rubber core does not expose copper.

The USB-A interface board is welded to the USB-A mother seat, input and output filter capacitors, and synchronous voltage rise and fall converters.

The other side is welded with synchronous voltage rise and fall switch tube, alloy inductance and protocol chip, as well as an anti overcharge protection chip.

The MPS MP4247 synchronous voltage rise and fall converter has two built-in lower tubes, with a working voltage of 3.6-36V and a maximum output current of 5A. It supports I2C configuration and is suitable for USB-PD charging equipment. The upper tube is external, and the lower tube is integrated internally. It can reduce the area and also disperse heat, and is used for USB-A quick charge voltage rise and fall voltage conversion.

four point seven μ Close up of H alloy inductance.

MP4247 is equipped with two external Ruijun RHU4040M2 NMOS for synchronous voltage rise and fall conversion.

The other RUH4040M2 switch tube.

The input filter capacitor is from Dongjia, VR series fast charging special solid capacitor, with the specification of 25V 100 μ F。

The output filter capacitor is also VR series, and the specification is 16V 100 μ F。

The USB-A port also uses the smart finance SW2303 protocol chip, which is consistent with the USB-C interface model.

USB-A interface adopts Zhirong SW2106 anti overcharge protection chip.

Two MOS tubes of silk screen 05 are used for output VBUS control.

The USB-A mother seat is a blue rubber core, which is welded and fixed through the hole.

Take a look at all of them and have a family photo.

Disassembly summary of charging head network

Bull's Gallium Nitride Charger is a common column shaped charger with folding pins, which is compact and convenient for daily carrying. The charger is more modern with black gray shell and silver decorative panel. In terms of output, it has 1A1C interface, USB-C interface supports 65W output power, which can charge notebook computers, USB-A interface supports 18W fast charging, and dual ports can be used simultaneously to support automatic power distribution.

The charging head network learned from the disassembly that the Bull Gallium Nitride Charger adopts the JW1515HA+JW7726 fast charging power supply scheme, and uses INN650D150A Gallium Nitride switch tube. Two Zhirong SW2303 protocol chips are used to correspond to USB-C and USB-A interfaces respectively, and two overcharge protection chips are used for automatic power-off function. USB-A port adopts synchronous voltage rise and fall chip for voltage conversion. The interior is filled with thermal conductive adhesive to enhance heat dissipation performance.