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Meizu Meizu pop2s true wireless Bluetooth headset

Release date:2021-12-28Author source:KinghelmViews:198

On October 20, 2020, Meizu technology released its new true wireless headset Meizu pop2s, which continued its developmentMeizu's deep precipitation in the field of acoustics in the past 17 years。 Its appearance follows the previous generation of productsMeizu pop/Meizu pop 2 true wireless Bluetooth headsetThe spiral curve design, audio design and hardware configuration are fully upgraded.


Meizu pop2s true wireless headset adopts a new double-layer structure composite diaphragm, combined with a new audio design, and the analytical power is greatly improved. Pop2s is Meizu's first product that supports "flyme miaolian". Open the charging box to quickly connect with the mobile phone, with a pop-up display; Built in Bluetooth 5.0 low delay chip, the headset supports call noise reduction, touch, wake-up voice assistant and other functions, the battery life data is 6h 24h, ipx5 waterproof and sweat proof. Let's take a look at the upgrading of its materials and structural design through disassembly.


Previously, I love audio network disassembled many Meizu audio products:Meizu hd60 noise reduction Bluetooth headsetMeizu hd60 headset Bluetooth headsetMeizu gravity suspension soundMeizu halo laser Bluetooth headsetMeizu ep63nc neck mounted noise reduction headsetMeizu hifi decoding earphoneMeizu hifi decoding earphone ProMeizu Bluetooth small speaker A20


1、 Meizu pop2s true wireless headset out of the box

     

 The packaging box is designed for the heaven and earth cover, with the same style as the previous generation, which is relatively simple, but without the iconic blue decoration of Meizu. The upper left corner is the brand name of Meizu, the middle area is the rendering of the headset and charging box, and the bottom is the product name "Meizu pop2s true wireless headset".

 
             

 On the back of the packing box are four product features: binaural transmission, master-slave switching; Connect immediately after opening the cover, no sense pairing; Ipx5 waterproof, available for travel and sports; The total battery life of headphones with charging box can reach 24 hours.

 
             

 At the bottom of the packing box is the company information and some product certification information, Zhuhai Meizu Technology Co., Ltd.

 
             

 Product label at the top, Meizu pop2s true wireless headset, white.

 
             

 Items in the box, Meizu pop2s headset and charging box, additional silicone earplugs and user manual.

 
             

 Two additional pairs of silicone earplugs are provided for people with different ear canal sizes. The earphone comes with a medium size.

 
             

 The charging box is displayed on the front with the same appearance as the previous generation. The top and bottom are flat and can be placed on the desktop. There are grooves, power indicator light and Meizu brand name at the front cover opening.

 
             

 The back of the charging box shows that the box cover is connected to the body through a metal hinge, and there is a quick pairing button below.

 
             

 The USB type-C charging interface is still at the bottom side of the charging box, with some product information next to it. Meizu pop 2S true wireless headset, headset battery rated capacity 3.7v/55mah, 0.222wh & times; 2. Input 5V ⎓ 55mA. The rated capacity of the charging box battery is 3.7v/350mah, 1.295wh, and the input is 5V ⎓ 350mA.

 
             

 I love the audio network  Chargerlab power-z km001c portable power tester  Conduct wired charging test on Meizu pop2s true wireless headset, and the charging power is about 1.6W.

 
             

 The status of the headset in the charging box.

 
             

 Two golden pogo pins to charge the headphones.

 
             

 Meizu Meizu pop2s true wireless Bluetooth headset.

 
             

 The headset and charging box weigh 46.9g.

 
             

 The single weight of the charging box is 36.7g.  



 
             

The left and right headphones weigh 10.3 grams.
 


2、 Meizu pop2s charging box disassembly

After unpacking in front, we have a preliminary impression of the appearance of Meizu pop2s real wireless headset, which has little change compared with the previous generation. Next, we'll take a look at its internal structure and power management system through disassembly.

     

 Pry open the charging cabin to see the internal structure.

 
             

 The PCBA where the charging interface at the bottom of the charging box is located is connected with the motherboard through wires.

 
             

 Display of inner structure of metal hinge.

 
             

 The internal structure of the charging box is displayed on the front.

 
             

 The internal structure of the charging box is displayed on the back.

 
             

 The main PCBA of the charging box is fixed on the shell with four screws, and there is a thick foam between the main board and the battery.

 
             

 Remove the main board and display it on the inside of the charging cabin. The four openings are the light guide structure of the indicator light. The circular magnets at the upper left and right are used to adsorb the box cover, and the four magnets at the earphone position are used to adsorb and fix the earphone.

 
             

 PCBA where type-C charging interface is located.

 
             

 PCBA is shown on the other side and is connected to the main board through wires.

 
             

 The charging input wire is connected with the main board through a connector.

 
             

 The main PCBA circuit display of the charging box is mainly the power management system. The lower right corner is the solder joint of the battery wire. The solder joint is full. TVs is provided at the interface of the charging box for electrostatic protection.

 
             

 The circuit on the other side of the main PCBA of the charging box shows that there are MCU related circuits.

 
             

 Siyuan semiconductor's sy8801 chip specially designed for TWS earphone charging bin also integrates I2C communication function and internal communication isolation function on the basis of ensuring safe and high reliable performance (supporting 28V input withstand voltage, built-in full-functional charge discharge overvoltage, overcurrent, over temperature, short-circuit protection, etc.). Through the I2C interface, the MCU of the system can read and configure the internal functions of the power supply and the parameters of battery charge and discharge management, and easily realize the functions such as NTC protection, subsection regulation of battery current, TWS headset warehousing, warehousing detection, automatic power output and so on.  



The integrated internal communication isolation module of Siyuan sy8801 greatly optimizes the functional design of intelligent TWS charging bin. Without complex peripheral circuits, MCU can control sy8801 through connection. Not only can the function of charging the headset be realized, but also the communication transmission of data can be carried out through the power pogo pin connected to the headset, including the power upload of the charging bin, the clearing and pairing of the headset in the charging bin, the restoration of factory settings, the upgrading of headset software and so on.


According to the disassembly of I love audio network, the power management chip of Siyuan semiconductor's TWS headset charging box has been replacedOppo, Xiaomi, Baidu, Wanmo, 233621, voice transmission, magic banquet, innovative technology, Yijia and many other well-known brandsuse.


     

Nuvoton Xintang technology n76e003aq20 8051 core single chip microcomputer, qfn-20 package, used for the whole machine control of charging box.



As far as I know,Oppo enco W51 true wireless noise reduction headsetVivo TWS Neo wireless Bluetooth headsetVivo TWS earphone true wireless Bluetooth headsetIt also adopts the single chip microcomputer of Xintang technology.



   

Introduction to Nuvoton Xintang technology n76e003aq20.

 
             

 Battery information, model 552035, rated voltage 3.7V, rated capacity 350mah.

 
             

 Close up of battery protection board, an integrated IC provides battery protection function.

 
             

 Pogo pin for charging headphones.

 
             

 Hall element of screen printing 4002 9pag. The magnetic field change when the charging box cover is opened and closed will be sensed by the hall element, and then inform the charging box MCU and headset to pair or disconnect with the connected equipment.

 
             

 Four LED indicators are used to display the power and charging box status.

 
             

 The micro key is welded on the main board.  


3、 Meizu pop2s earphone disassembly

     

 Now let's continue to disassemble the headset. The appearance of Meizu pop2s true wireless earphone continues the classic design of Pop series. The earphone shell follows the golden section ratio, and the spiral design is more suitable for the auricle, which can enhance the stability and comfort of wearing.

 
             

 The earphone shell supports touch control, with Meizu's brand name on it. The outer ring is still the iconic halo design of Meizu Pop series. This time, a white halo is used instead of blue. The official promotion is more unified with the white indicator light of the charging box.

 
             

 The light guide column on one side of the shell and the opening of the call microphone.

 
             

 The product name "Meizu pop2s" is printed near the contact for charging the headset battery.

 
             

 Metal dust screen is used at the sound outlet of the headset to prevent foreign matters from entering.

 
             

 Disassemble the earphone shell along the clamping line to see the internal structure.

 
             

 The inner side of the earphone shell is displayed, and the metal foil in the middle is used to sense the touch operation; The transparent material of the outer ring can transmit light to form an aperture effect.

 
             

 The internal structure of the left and right headphones is basically the same.

 
             

 There is a white bracket inside the headset to fix the motherboard and battery.

 
             

 One side of the shell has FPC welded to the main board.

 
             

 The nickel plates of the positive and negative electrodes of the battery are welded on the main board.

 
             

 Open the solder joint and remove the main board.

 
             

 Size comparison between motherboard circuit and one dollar coin.

 
             

 The circuit on one side is shown, and the lower part is the connector base connected between the charging contact FPC and the main board.

 
             

 The circuit on the other side shows that below the QR code label is the Bluetooth master chip.

 
             

 The main control chip of Meizu pop2s true wireless headset is bes wt230-u. Windtunnel wind tunnel is the Bluetooth chip brand of hengxuan technology.  



Wt230-u is a highly integrated SOC with Bluetooth 5.0 dual-mode and high-performance cortex-m4f, which is suitable for audio and voice applications; Wt230-u minimizes the cost of external components and BOM through highly integrated RF transceiver, high-performance audio codec and uncovered headset driver.


Wt230-u is manufactured by advanced low-power CMOS technology and packaged in 4 * 6mm 40 pin QFN; Bluetooth version 5.0, power consumption 8Ma. Wt230m / S / u, corresponding to wt200m / S / u respectively, can support mono / stereo / TWS Bluetooth headset scheme.


According to the dismantling of I love audio network, there areHuawei, Samsung, Xiaomi, oppo, JBL, Wanmo, glory, Baidu, Yijia, voice transmission, nuts and other brands of true wireless headphones largely adopt hengxuan scheme


     

Integrated battery protection IC of silk screen 13A.  
 
 
     

 IC of silk screen via.

 
             

 MEMS silicon microphone of radium carving 0067 2231 is used for call pickup.

 
             

 The protective cover of the microphone pickup hole on the other side of the motherboard.

 
             

 Connect the pogo pin of the touch sensing area.

 
             

 Tongtai TTP 233dp single channel touch chip is used to detect touch operation.

 
             

 One LED indicator.

 
             

 Take out the button battery and you can see the structure in the sound cavity.

 
             

 Size comparison of button battery and bracket with one dollar coin.

 
             

 Remove the bracket that secures the battery and motherboard.

 
             

 The button battery is from mic-power micro electric new energy, model m1254s2, diameter 12mm, thickness 5.4mm, rated voltage 3.7V, rated capacity 0.222wh, 60mah.  



According to the dismantling of I love audio network, there aretwo million three hundred and thirty-six thousand three hundred and twenty-oneRamblervivoKlipsch JessMeizuJEETIqiyiVIDVIEA large number of earphone products of other brands use micro electric new energy button batteries.


     

The layout of the sound chamber is displayed, the speaker unit is sealed independently, and two magnets are used to adsorb and charge the cabin. The charging contact is connected to the main board through FPC.



     

The Hall IC of silk screen agov has TVs electrostatic protection on the soft board.  
 
 
     

 Remove the cover outside the speaker unit.

 
             

 The speaker unit is connected to the main board through FPC, which also integrates Bluetooth antenna for data transmission.

 
             

 The cover plate is positioned through the plastic column and fixed with glue.

 
             

 Location of the speaker unit.

 
             

 The size of moving coil unit is about 6mm.

 
             

 Disassemble the family photo.  


I love audio network Summary

From the perspective of hardware disassembly, Meizu pop2s real wireless headset is not much different from the previous generation products in structure. In terms of materials, the charging box adopts a more integrated IC, the official publicity of the headset adopts a new double-layer structure composite diaphragm, the Bluetooth main control chip is replaced with wt230-u from the previous generation bes2300l, and the new functions of cover opening and mobile phone pop-up are supported.

Meizu pop2s charging box adopts type-C interface input power supply, Siyuan semiconductor sy8801 chip supports 28V input withstand voltage, and has built-in full-functional charge and discharge overvoltage, overcurrent, overtemperature, short-circuit protection and other functions to be responsible for battery charge and discharge; Siyuan sy8801 also integrates I2C communication function and internal communication isolation function. Xintang technology n76e003aq20 MCU can read and configure the internal functions of the power supply and the parameters of battery charge and discharge management, and is responsible for the control of the whole machine. The cover opening and connection function is realized by Hall element. The capacity of soft pack battery is 350mah, which is the same as that of the previous generation.

In the earphone part, Meizu pop2s continues the classic design. The earphone shell follows the golden section ratio, and the spiral design is more suitable for the auricle. However, the halo design this time adopts white, which is officially declared to be more unified with the white indicator light of the charging box. There is a plastic bracket inside the headset to fix the battery and main board. The sound cavity is sealed independently to reduce noise. The structural design is the same as that of the previous generation. The touch scheme is from Tongtai 233dp, and the supplier of button battery is from micro electric new energy, with a capacity of 0.222wh and about 60mah.

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