Founded in 2017, Black Shark is a gaming phone brand under Xiaomi. With complete mobile phone design, research and development, manufacturing and sales capabilities. Starting from the needs of mobile game players, its products optimize and improve ID, performance, software interaction, etc., focusing on creating game phones and accessories that are truly designed for mobile game players.
Black Shark JoyBuds true wireless bluetooth earphones is its latest TWS headset product, which continues the family-style cool esports style design and is highly recognizable. In terms of configuration, it is equipped with a 14.2mm dynamic driver and is designed with a bass guide tube to present surging low-frequency sound effects. Supports ultra-low latency for games. The Bluetooth 5.2 protocol combines the ultra-low latency technology independently developed by Black Shark to achieve 30ms earphone latency and 85ms full link latency.
Other aspects also support dual-mic ENC calls, providing clear call effects. Supports intelligent touch detection and in-ear detection, providing a more convenient and intelligent interactive experience. With the Black Shark phone, it also supports quick pairing by opening the pop-up window. In terms of battery life, the single battery life is about 6 hours, and the overall battery life with the charging case is about 28 hours. Let’s take a look at the detailed disassembly report of this product.
|1. Black Shark JoyBuds charging case teardown
Through unpacking, we learned about the cool design of this product. Enter the teardown section below to see the internal structure design and configuration information.
Pry off the snap-fastened charging case headphone cockpit, and the main internal components are fixed in the charging case through brackets.
The bottom structure of the cockpit is equipped with two magnets to attract earphones.
There are magnets on the side of the cockpit to attract the charging case cover.
Take out the internal structure of the charging case.
The structure on one side of the frame is provided with an FPC cable connected to the motherboard.
The structure on the other side of the frame.
The motherboard is screwed to the top of the frame.
Remove the screws to remove the motherboard, and the battery unit is set inside the lower frame, which plays a very good protective role.
Take out the battery, the main components inside the charging case.
The FPC cable circuit is provided with function buttons, Hall elements and indicator lights, and the end is connected to the main board with a ZIF connector.
LED indicator for feedback of earphone pairing status and charging case power information. The outer sponge is wrapped to prevent light leakage.
Micro-buttons on the cable are used for bluetooth pairing.
The hall element of the silkscreen 8691J is used to sense the magnetic field change when the charging case is turned on/off, and then notify the charging case MCU and the earphones to pair or disconnect from the connected device.
The internal rechargeable lithium-ion battery model of the charging case: 822024, rated voltage: 3.7V, charging limit voltage: 4.2V, rated capacity: 400mAh/1.48Wh, typical capacity: 420mAh/1.55Wh.
The circuit on one side of the charging case motherboard.
The circuit on the other side of the motherboard, the front and back of the circuit are coated with glue to protect the large area.
The pogo pin connector for charging the earphones.
SinhMicro SS881E POWER MCU, using SSOP24 package, integrates battery charging management and single chip microcomputer, and realizes functions such as power management and charging case control.
SS881X is SinhMicro’s AD-type Flash MCU series integrated with charge and discharge management. It has built-in rich interface functions, flexible configuration modes and different low-power options. This product is mainly used in portable intelligent electronic devices that require charging and intelligent control, bringing streamlined peripheral costs, excellent performance and flexible and convenient development.
According to 52audio, many TWS headphone charging cases including Xiaomi, OPPO, Honor, Redmi, realme, Nubia, Lenovo, Edifier, Soundcore, 1MORE, JBL, Philips, Razer, ZMI and other brands have adopted SinhMicro’s solution.
Prisemi P14C1N overvoltage and overcurrent protection IC, withstand voltage up to 32V, overvoltage fixed 6V. The peripheral resistance of the overcurrent protection point is adjustable, the overcurrent response time is adjustable, and the overcurrent protection accuracy is 10ma, which can meet the overcurrent protection requirements of various adapters and various projects.
According to 52audio, a number of TWS earphone products under Xiaomi, OnePlus, Soundcore and other brands have adopted Prisemi power management chips in large quantities.
Willsemi ESD56241D22 18V TVS protection tube for input overvoltage protection.
Silkscreen W8UA’s boost IC.
The power inductor of the silkscreen 470 is used with the boost chip to boost the earphones.
Type-C charging interface female socket, the interface is provided with a sealing sponge for waterproofing.
|2. Black Shark JoyBuds earphones teardown
Go to the earphones teardown section. Pry open the cavity along the parting line, and there are cables connecting the front and rear cavities.
The internal structure of the front cavity of the earphone is provided with a speaker and a capacitive in-ear detection patch.
Take out the speaker, the internal structure of the front cavity is provided with a white plastic part, and the inner side of the plastic part is provided with an in-ear detection patch.
Take out the plastic parts, the internal structure of the cavity is fixed with a capacitive in-ear detection patch.
Capacitive in-ear detection patch is used to realize automatic pause when picking, and automatic resume playback when wearing.
On the front of the speaker, a titanium-plated composite diaphragm is used.
On the back of the speaker, there are tuning holes all around to improve the acoustic performance.
After actual measurement, the speaker size is about 14.2mm.
A battery unit is fixed inside the rear cavity, and a magnet and an acoustic guide tube for enhancing the bass effect are arranged on the cavity wall.
Remove the guide tube, the internal structure of the cavity. The battery is embedded at the bottom of the rear cavity, which fits perfectly with the cavity and is difficult to remove.
Finally, through “violence”, the back cavity and the headphone handle structure were cut, and the internal components were taken out.
The touch detection patch and the microphone opening are on the cavity wall of the rear cavity.
The internal components of the back cavity of the earphone, an FPC cable in series with the front cavity speaker, the in-ear detection patch, the rear cavity battery and the noise cancelling microphone, and the main board in the earphone handle.
The cable is used to connect to the BTB connector male socket of the motherboard.
Connect the BTB connector male socket of the speaker cable inside the front cavity.
Laser carving MD06 R111’s MEMS noise cancelling microphone is used for dual-mic ENC call noise cancelling function.
The inside of the earphone uses a steel shell button battery, capacity: 35mAh/0.130Wh.
The other side of the battery is engraved with the battery model: ICB1040, rated voltage: 3.7V, from EVE.
Remove the plastic frame fixed on the mainboard of the earphone, and the metal patch on the inside of the frame is used to connect with the mainboard.
There is a bluetooth antenna on the outside, and the silkscreen information “BTE 630-R-V4”.
The circuit on the side of the mainboard of the earphone adopts the technology of combining soft and hard boards, which can make better use of the internal space of the earphones.
circuit on the other side of the motherboard.
The end of the main board is connected to the call microphone through a soft PCB, and the acoustic structure of the microphone is sealed with a large amount of glue to improve the radio performance.
Remove the sealant, you can see the internal laser carving MD06 R111 MEMS microphone, used for voice call function pickup.
AIROHA AB1562M bluetooth audio SoC, supports Bluetooth 5.2 specification, with ultra-low power consumption, stable bluetooth connection and Passthrough function. It also supports 3-mic noise cancelling, and with Airoha noise cancelling algorithm, it can effectively reduce wind noise and improve call quality.
According to 52audio, many bluetooth headphones from brands such as Sony, Zepp Health Corporation, 1MORE, realme, FIIL, Edifier, Plantronics, and earsopen have adopted the AIROHA solution.
The crystal oscillator that provides the clock for the bluetooth chip.
The peripheral power inductor of the main control chip supplies power to the internal circuit of the bluetooth chip.
Another precision wire wound power inductor.
Silkscreen 0aY IC.
Two metal dome for connecting the bluetooth antenna.
Metal dome used to connect the touch detection patch.
GOODiX GH610 capacitive in-ear detection and touch 2-in-1 chip integrates a high-performance, low-power MCU and self-capacitance sensing front-end circuit, which can perform in-ear detection and touch operation according to capacitance changes, so as to realize the corresponding human Control of computer interface systems. This series of chips adopts the sensing algorithm independently developed by GOODiX, which can achieve ultra-high signal-to-noise ratio, and can accurately identify the status of the earphone (wearing/taking off) and operations such as sliding, single-double-click, and long-press.
According to 52audio, a number of TWS headphones from Xiaomi, JBL, OnePlus, OPPO, realme, vivo, Baidu, 1MORE and other brands have adopted GOODiX’s in-ear detection and touch 2-in-1 solution.
GOODiX GH610/611 system block diagram.
All components of Black Shark JoyBuds true wireless bluetooth gaming earphones.
|3. Summary
Black Shark JoyBuds gaming earphones are designed with a small and portable charging case, with a matte texture and mecha-style coating. The earphones have a handle-shaped semi-in-ear design with a lightweight body for long-lasting comfort. The overall design of the earphone is full of three-dimensionality. The CD texture on the back and the Black Shark classic green ring present a very cool esports-style look and feel.
In terms of internal circuits, the charging case uses a Type-C interface input power supply, is equipped with Prisemi P14C1N overvoltage and overcurrent protection IC, and Willsemi ESD56241D22 18V TVS protection tube. The built-in battery capacity is 400mAh, and the built-in battery is charged by the Sinhmicro SS881E POWER MCU. Screen printing W8UA’s boost IC, which boosts the built-in battery and charges the earphones.
In the earphone part, the components are connected through an FPC cable and a BTB connector. A 14.2mm dynamic driver and an in-ear detection sensor are used in the front cavity. Inside the rear cavity is a 35mAh steel-shell button battery and a noise cancelling microphone. The PCBA in the earphone handle adopts a combination of soft and hard boards, which makes better use of the internal space of the earphone and reduces the size and weight of the motherboard.
The main control chip of the earphone is AIROHA AB1562M bluetooth audio SoC, which supports Bluetooth 5.2 and call noise cancelling functions. With two MEMS microphones and Airoha noise cancelling algorithm, it can effectively reduce wind noise and improve call quality. The headphone interaction scheme adopts GOODiX GH610 capacitive in-ear detection and touch 2-in-1 chip to accurately detect the wearing status of the earphone and control it in various ways.
Source: 52audio
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