Only ordinary 65W fast charging size, how is the interior designed? Xiaomi 210W gallium nitride fast charging disassembly

The launch of Hongmi Note12 Exploration Edition further refreshed the wired fast charging power of the mobile phone to 210W, bringing the charging time of the mobile phone into a single digit era. Thanks to the gallium nitride technology, the 210W charger has the same volume as the traditional charger. It not only has the volume effectively controlled, high conversion efficiency, but also reduces the temperature of the charger.

Xiaomi's 210W charger model is MDY-13-EU. It supports 20V10.5A output specification and is compatible with 65W PD. It can also charge laptops, tablets and other Android phones. The following is the disassembly of this charger to see how the internal design of the charger refreshes the fast charging power.

The charger is made of PC fireproof white shell, the waist is still a bright design, and both ends are frosted.

210W and Designed by Xiaomi printed on the front.

The charger is equipped with fixed national standard pins, which are arranged on one side for easy plugging.

The back of the fuselage features the same logo design as the front.

GaN and Designed by Xiaomi are printed on the back. It can be seen from the design on the front and back that this is a 210W GaN charger designed by Xiaomi.

The input terminal housing is printed with charger parameters, MDY-13-EU model, supporting 100-240V~50/60Hz 3A input, and 5V3A, 9V3A, 11V6A, 17V10.5A, 20V10.5A output. The charger has passed CCC certification.

The output terminal is equipped with a single USB-C interface.

The rubber core of USB-C interface is yellow.

The measured height of the charger body is 67.32mm.

The width is 64.61mm.

The thickness is 29.58mm.

Compared with the Apple 61W charger, the body is slightly smaller.

It is intuitively felt that the 210W power is only as big as this, which is quite remarkable.

In addition, the measured net weight of the charger is about 220g.

Using ChargerLAB POWER-Z KM002C, it is measured that the USB-C port supports the QC3.0, PD3.0 general fast charging protocol and the Xiaomi 210W private fast charging protocol.

In addition, the PDO message shows that there are four groups of fixed voltage gears: 5V3A, 9V3A, 15V3A and 20V3.25A, and three groups of PPS voltage gears: 3.6-11V10A, 3.6-17V10.5A and 3.6-20V10.5A.

Use a 210W fast charging kit to charge the Red Rice Note12 Discovery Edition, with a power of 17.64V 10.34A 182.43W, and successfully trigger the fast charging.

After seeing the appearance and protocol test of this charger, we will disassemble the charger to see how the internal design and materials can achieve 210W super power output.

First, use the cutting machine to cut the shell, and the PCBA module inside the charger is filled with glue to enhance the heat dissipation capacity, increase the heat capacity, and reduce the temperature rise during fast charging.

The charger is internally connected by wires, and the pin ends are crimped.

Graphite heat conductive paste is pasted inside the shell to evenly distribute heat.

At a glance, PCBA modules are filled with glue to fill the gap between components.

The length of PCBA module measured with vernier caliper is about 60mm.

The width of PCBA module is about 58.88mm.

The thickness of PCBA module is about 25.32mm.

Clean up the potting compound. The lower left corner of the PCBA module is the power input terminal, welding fuse, varistor, thermistor, safety gauge X2 capacitor. At the bottom of the middle is the PFC boost inductor, and at the right of the boost inductor is the high-voltage filter capacitor, which is welded to the vertical small plate. Below the capacitor is a planar transformer. The upper right corner is the output filter capacitor, and the upper left corner is welded with USB-C bus base for output.

The rectifier bridge is welded on the right side of the back, the protocol chip is welded on the upper left corner, and the lower two optocouplers are used for PFC and flyback switching power supply control respectively. The lower left side is welded with PFC controller and flyback controller, and two nano GaN power chips.

Through observation on PCBA module, it is found that this 210W charger adopts PFC+QR flyback switching power supply architecture, synchronous rectification, and supports wide range voltage output. Among them, the PFC boost controller is from Silijie, the flyback controller is from Ansenmei, and the two GaN power chips are from Nanomicro. Now let's start from the input to understand the information of each device.

List of AC input terminals and welding of cold pressed terminals of wires.

Close up of delay fuse at input end, insulated with heat shrinkable tube.

The varistor is from Matata Electronics, and the specification is 10D681K. It is used for AC input surge protection.

NTC thermistor is used to restrain the surge surge current of the charger connected to the power supply.

The common mode inductor is insulated by heat shrinkable tube, and the insulation support is welded at the bottom.

The safety gauge X2 capacitor is from Matata Electronics, and the specification is 0.47 μ F。

The rectifier bridge is from Pingwei, the model is TBMR810, the specification is 8A 1000V, and two half bridges are used for connection, so as to generate heat evenly.

Weld a rectifier bridge of the same model on the other side of PCB.

Close up of two magnetic ring filter inductors, insulated with plastic shell.

Two thin-film filter capacitors from Matsuda Electronics, specification 1 μ F450V。

PFC boost controller is from Silijie, model SY5072B, which operates in critical mode with constant conduction time. The built-in boost converter uses quasi resonant switch to obtain high efficiency and optimize EMI performance.

PFC switch tube is a GaN power chip from nano micro, with the model of NV6127. It is internally integrated with GaN switch tube, GaN driver and logic circuit, which is simple in application. The NV6127 is packaged with QFN6 * 8mm, with upgraded heat dissipation performance, 125m Ω resistance, and the built-in driver supports 10-30V power supply. Up to 2MHz switching frequency is supported.

Nanosemiconductor NV6127 information.

According to the disassembly of the charging head network, there are also ASUS 300W chargers, Lenovo 90W flash charging dual port gallium nitride chargers, Beisi 120W gallium nitride+silicon carbide PD fast charging chargers using nano micro NV6127 gallium nitride chips. In addition, the nanoGaNFast power chip has previously been used by OPPO 50W biscuit gallium nitride fast charge, RAVPOWER 65W 1A1C gallium nitride fast charge, Xiaomi 65W gallium nitride charger, SlimQ 65W gallium nitride fast charge, Anker PowerCore Fusion PD super charge, RAVPower 45W GaN PD charger, Bess 65W gallium nitride charger and other products, and has been highly recognized by the market.

Close up of PFC step-up inductor, wrapped with tape for insulation.

PFC rectifier tube is from Pingwei, screen printed PBES10JE, which is a 10A 600V ultra fast recovery diode.

Inside the charger, a pen shaped electrolytic capacitor is stacked with a plane transformer to make full use of space.

The electrolytic capacitor is welded to the small plate vertically welded.

The high-voltage filter capacitor is placed inside the plastic shell for insulation.

High voltage filter capacitor is from Wanyu, and the specification is 56 μ F420V, two in parallel.

The main control chip adopts the Ansenmey NCP1342, which is a high-frequency flyback quasi resonant primary PWM controller with built-in high-voltage startup, active X2 capacitor discharge, wide range Vcc power supply, external thermistor for overheating protection and multiple perfect protection functions.

The primary switch adopts nano NV6136A, which is a highly integrated GaN power chip, with built-in driver and high-precision lossless current sampling circuit to eliminate the loss of sampling resistance. The NV6136A has a built-in 170m Ω conduction resistance, a 700V withstand voltage GaN switch tube, supports 2MHz switching frequency, and uses 6 * 8mm QFN packaging to save area.

Nano NV6136A data information.

The charging head network learned through disassembly that the nanoGaNFast power chip has been used by dozens of well-known brands such as Motorola 68W GaN charger, Dell 60W GaN fast charge, OPPO 50W biscuit GaN fast charge, Xiaomi 65W 1A1C GaN fast charge, Nubia 65W Deuterium Front three port GaN fast charge, Lianxiang YOGA 130W dual USB-C fast charge, and Anke 65W GaN charger (League of Heroes version).

The filter capacitor supplied by the main control chip is from Dongjia, and the specification is 100V18 μ F。

At the output side of the planar transformer, filter solid capacitor and synchronous rectifier tube are welded.

The magnetic core of the planar transformer is wound with high-temperature tape for insulation, and three solid capacitors are welded for output filtering.

The position of the magnetic core corresponding to the PCB is pasted with a Mylar to strengthen insulation, and the output side is welded with a synchronous rectifier controller and a synchronous rectifier tube.

The synchronous rectifier controller is screen printed with IBHJN, the actual model is MP6908A, from MPS core source semiconductor, and the maximum working frequency is 600KHz. It supports DCM, CCM, QR, ACF multiple working modes, supports high side and low side applications, and has ring detection to prevent false opening.

The synchronous rectifier tube is from Changjing Technology, with the model of CJAC110SN10L, NMOS, withstand voltage of 100V, conductivity of 4.3m Ω and two in parallel.

The output filter capacitor is from emerald, which is a CT series 125 ℃ chip solid state capacitor, and the specifications are 470 μ F 25V。

Crush the magnetic core and make a list of internal coils.

It can be seen from the screen printing that the small plane transformer board is from JOVE Zhongfu Circuit. It is a professional circuit board manufacturer and a national high-tech enterprise. The company is now listed.

The two Y capacitors are double Y safety ceramic capacitors from Xiamen Huaxin An Electronics, which are designed with double insulation in series.

Two EL1019 optocouplers are used for output voltage feedback and PFC control functions.

The output adopts magnetic loop inductance filtering, and the enamelled wire passes through the insulating bakelite board.

The output filter solid state capacitor is from PolyCap Brilliant, which is RQ series 125 ℃ heat-resistant solid state capacitor. 680 μ F 25V。

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

The charging head network has learned that Yingjixin IP2726 has previously been used by AUKEY 65W 1A1C Gallium Nitride Fast Charging Charger, RAVPOWER 90W Dual USB-C Port PD Fast Charging Charger, Stark 100W Dual USB-C Port Gallium Nitride Charger, Maiduoduo 30W 1A1C USB PD Fast Charging Charger, Kunxing 18W USB PD3.0 PPS Fast Charging Appliance and other products. In addition, Yingjixin's other series of fast charging chips have also been highly recognized by Xiaomi, Huawei, Samsung and other customers.

The output VBUS switch tube adopts Weizhao semiconductor VS3698AE, NMOS, withstand voltage 30V, conductivity 3m Ω, and is packaged with PDFN3333.

Details of Weizhao Semiconductor VS3698AE.

A VS3698AE is also welded on the front, and two pipes are connected in parallel.

The output USB-C female seat is welded on the small plate.

The USB-C bus base is welded by sinking plate, and the bus base, NTC thermistor and TVS diode are welded on one side.

There are no welding elements on the other side.

USB-C female seat adopts yellow rubber core.

An Ansome NCP51530B driver is also welded on the front of the PCB.

There are also Weian WMF04N60C2 NMOS tubes.

Take a look at the whole family.

Xiaomi 210W Gallium Nitride Fast Charging Charger continues the family design of Xiaomi Charger. It adopts a fixed pin design and has a single USB-C interface. It not only supports Xiaomi 210W fast charging, but also is compatible with 65W PD fast charging to meet the daily use of mobile phones and laptops.

The charging head network learned through disassembly that Xiaomi 210W charger adopts PFC+QR power supply architecture, adopts Silijie SY5072B PFC controller and Anson NCP1342 QR controller, and has two GaN power chips, namely Nano NV6127 and NV6136A. The output synchronous rectifier controller adopts MPS MP6908A, the protocol chip is from Yingjixin, the model is IP2726, and supports the millet private protocol.

The inner part of the charger adopts the potting process, and the inner part is composed of several small plates welded