Black Shark – a gaming e-sports mobile phone brand, launched the Black Shark JOYBUDS true wireless earphones at the end of 2021. Based on the Bluetooth 5.2 protocol and self-developed ultra-low latency technology, the entire link has a latency as low as 85ms. Recently, the Black Shark JOYBUDS PRO true wireless noise cancelling earbuds was officially released, adding the active noise cancelling function on the basis of the previous generation, and obtained the Qualcomm Snapdragon Sound certification, providing a more immersive game audio and video experience.

Black Shark JOYBUDS PRO true wireless noise cancelling earbuds continue the cool gaming style design of the previous generation in appearance. In order to provide a better noise cancelling effect, earphones have been changed from the previous semi-in-ear design to an in-ear design. In terms of functions, it still focuses on the ultra-low-latency professional game mode, adopts the Bluetooth 5.2 protocol, support aptX Adaptive audio decoding, and realizes the full-link 85ms ultra-low latency.

In terms of noise cancelling, ANC adaptive hybrid active noise cancelling is supported. Dynamic environmental noise detection for the external environment, intelligent adjustment of light, balanced, deep and anti-wind noise modes, the maximum noise cancelling depth reaches -40dB. It supports CVC8.0 dual-microphone noise cancelling, and has a 16bit 32kHz ultra-high up-call sampling rate, providing high-definition call effects. Let’s take a look at the teardown report of this product in detail.


01/ Black Shark JOYBUDS PRO charging case teardown

Through unboxing, we learned about the cool gaming-style design of this product. Enter the teardown section below to see the internal structure configuration information.

Pry open the charging case cockpit, the internal structure of the cavity is provided with a frame for fixing the internal components.

The bottom structure of the cockpit is equipped with multiple magnets for better fixing earphones and charging case cover.

On the frame below the cockpit, there are indicator lights and Hall elements.

Take out the frame inside the charging case.

The frame has a structure on one side, a main board is arranged at the bottom, and a battery unit is arranged in the frame to achieve better protection.

The outside of the frame is fixed with the bluetooth pairing button, as well as the FPC cable of the indicator light and the Hall element.

The small board that charges the earphone is fixed with glue and is also connected to the motherboard through a cable.

The main component teardown in the charging case.

Charging case built-in rechargeable lithium-ion battery pack Model: 931730, rated capacity: 420mAh/1.554Wh, rated voltage: 3.7V, charging limit voltage: 4.2V, manufacturer: VDL, made in China.

The silkscreen information on the cell is consistent with the external label.

Battery circuit protection board circuit.

Silkscreen 1S1AJ lithium battery protection IC.

Micro-buttons for pairing/resetting/clearing connections of earphones.

The charging case LED indicator is used to feed back the charging case pairing status and remaining power information.

The hall element of the silkscreen 8891a is used to sense the magnetic field change when the charging case is turned on/off, and then notify the charging case MCU and earphones to pair or disconnect from the connected device.

Pogo pin connector for charging earphone.

circuit on the motherboard side.

circuit on the other side of the motherboard.

The Type-C charging socket is protected by a rubber cover, which is dustproof and waterproof.

Sinhmicro SS881Q POWER MCU, in 4*4mm QFN24 package, integrates battery charging management and single chip microcomputer, which can realize functions such as power management and charging case control.

SS881X is Sinhmicro’s AD-type Flash microcontroller series with integrated 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, there are Xiaomi, OPPO, Honor, Redmi, realme, Nubia, Lenovo, Nokia, HTC, Edifier, Soundcore, 1MORE, FIIL, 233621, JBL, Philips, Skullcandy, Razer, ZMI, The TWS earbuds of Astrotec, LINNER, AbramTek and many other brands have adopted the Sinhmicro solution.

The LPS LP5305A overvoltage and overcurrent protection IC is used to protect low voltage systems from abnormally high input voltages. During operation, the IC continuously checks the input voltage, input current and battery voltage. When the protection state occurs, the power MOS will be turned off at the same time.

The LP5305 is a safety device that ensures accident prevention. If the input voltage exceeds the OVP threshold voltage level, the power MOS will turn off. The current limit is adjustable with an external resistor between ISET and GND. And the current is also limited to prevent the battery from charging too much current. The LP5305 also monitors the Li-Ion battery voltage, when the battery voltage exceeds 4.35V, the IC will turn off the MOS. Additional features include overtemperature protection and undervoltage lockout (UVLO). The LP5305 is available in a space saving DFN-8 package. ‎

According to 52audio, audio products of Xiaomi, Honor, OPPO, Huawei, Redmi, realme, Lenovo, Sony, Nokia, Motorola, Edifier, Soundcore, 1MORE, QCY, UGREEN, Razer and many other brands have adopted LPS. Power management chip.

Willsemi ESD56241D22 18V TVS protection tube for input overvoltage protection.

LPS LP6261A 1uA low power boost chip. The switch pin adopts a high-voltage 9V process, which can effectively absorb the high-voltage spike generated when the earphone is plugged and unplugged. At the same time, LP6261A has no whistling sound in full load capacity (especially light load).

LP6261A adopts SOT23-6 package, 1.7uA ultra-low power boost (when 5V is normally open), the output voltage is adjustable; the shutdown current is <0.1uA, the built-in EN is completely turned off, and the built-in output short-circuit protection.


02/ Black Shark JOYBUDS PRO earbuds teardown

Go to the earphones teardown section. Pry open the cavity along the parting line, and there are cable connections between the inner and outer cavities.

Pick apart the BTB connector to separate the front and rear chambers.

The internal structure of the front cavity, the speaker is welded on the cable.

Take out the speaker, the internal structure of the cavity, the in-ear detection sensor is attached to the cavity wall, and the innermost side is also provided with a cover plate.

Take out the internal structure of the cavity of the cover, and extend the cable to the noise cancelling microphone inside the sound tube.

The internal circuit of the front cavity is provided with a speaker, a microphone and a large-area in-ear detection patch.

BTB connector female seat, the back is provided with a metal plate to enhance the strength.

The MEMS back-feed noise cancelling microphone of the laser carving 120 ANC is used for the active noise cancelling function to pick up the ambient noise inside the ear canal.

The earphone uses a dynamic driver with a tuning hole on the back and is protected by a dust-proof net.

On the front of the dynamic driver, the diaphragm is covered with a layer of wool to improve acoustic performance.

After actual measurement, the speaker size is about 12mm.

Pry open the back panel of the earphone handle, the internal structure of the cavity.

A touch detection patch and a bluetooth antenna are fixed on the inner side of the headphone handle cover, and are connected to the motherboard through metal contacts. The microphone pickup structure at both ends adopts a unique anti-wind noise design, which effectively reduces the impact of wind noise.

Take out the main board from the cavity of the earphone handle, and the internal structure of the cavity.

The battery cable and BTB connector male socket connected to the motherboard.

Take out the battery unit in the earphone head, the internal structure of the rear cavity.

The earphone pressure relief hole in the rear cavity is also filled with foam to eliminate the influence of wind noise.

The special-shaped magnet fixed on the rear wall is used to attract the charging case.

The battery circuit inside the earphone.

A lithium battery protection IC with silkscreen Ox A6 is set on the battery FPC board.

The earphone is equipped with a steel shell button battery, which is wrapped in a blue insulating plastic sleeve.

Tear off the plastic protection, the information on the battery is model: ICB1250, voltage: 3.85V, from EVE.

Male BTB connector for connecting to the motherboard.

Male BTB connector for connecting cables inside the front cavity.

The circuit on the side of the earphone motherboard.

The circuit on the other side of the earphone motherboard.

Call pickup microphone hole on the motherboard.

Metal dome connector for connecting touch detection patch and bluetooth antenna.

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 induction algorithm independently developed by Goodix Technology, which can achieve ultra-high signal-to-noise ratio, and can accurately identify the status of the earphones(wearing/taking off) and operations such as sliding, single double-click, and long-press.

According to 52audio, a number of TWS earbuds from Xiaomi, JBL, OnePlus, OPPO, realme, vivo, 1MORE, Black Shark and other brands have adopted GOODiX’s in-ear detection and touch 2-in-1 solution.

GOODiX GH610 system box.

The MEMS microphone of the laser carving R152 A51D is a feed-forward noise cancelling microphone, which is used to pick up external environmental noise, from RAYKING.

The voice pickup microphone is the same model as the feedforward noise cancelling microphone.

Female BTB connector for connecting battery cables.

The Qualcomm QCC3056 bluetooth Audio SoC is an ultra-low power, single-chip solution. Adopt WLCSP package, built-in powerful quad-core processor architecture, support Bluetooth 5.2 and Qualcomm TrueWireless™ mirroring technology, provide stable connection; support Qualcomm Snapdragon Sound audio technology platform, support aptX™ Adaptive audio decoding, adaptive active noise cancelling, cVc Echo cancellation and noise suppression, etc.

According to 52audio, there are many TWS true wireless earphones, over-earheadphones, neckband bluetooth earphones, smart speakers, smart audio glasses and other audio products that use Qualcomm bluetooth audio SoC.

The crystal oscillator that provides the clock for the bluetooth chip.

The main control chip peripheral step-down inductor.

The memory of the silk screen 6AJI Q1V is used to store information such as bluetooth configuration.

All components of Black Shark JOYBUDS PRO true wireless noise cancelling earphones.


03/ Summary

Black Shark JOYBUDS PRO charging case adopts a rounded square design, frosted material, and is painted with mecha wind to present a cool gaming style. The earphones adopts a handle-shaped in-ear design, and the overall look and feel is full of three-dimensionality. The design of the black and green color matching decorative pieces on the back further enhances the recognition of the product.

On the reverse side of the internal circuit, the charging case uses the Type-C interface input power supply, equipped with LPS LP5305 input overvoltage and overcurrent protection IC and Willsemi ESD56241D22 TVS protection tube. Built-in VDL 420mAh lithium-ion battery, SinhMicro SS881Q POWER MCU with integrated battery charge management and microcontroller, power management and charging case control functions. The built-in battery is boosted by the LPS LP6261A boost chip to charge the earphones.

The front cavity, the rear cavity and the components in the earphone handle are connected by BTB connectors, and the structure is clear and easy to teardown. A 12mm dynamic driver, an ANC microphone and a large-area sensor for in-ear detection are used in the front cavity. An EVE 1250 steel-shell button battery is installed in the back cavity to provide energy for various functional applications of earphone.

On the motherboard, the Qualcomm QCC3056 bluetooth audio SoC supports Bluetooth 5.2 and supports the Qualcomm Snapdragon Sound audio technology platform. Support aptX audio decoding, adaptive active noise cancelling, cVc echo cancellation and noise suppression and other functions. GOODiX GH610 capacitive in-ear detection and touch 2-in-1 chip is also used to extract automatic pause and control of various functions.

Source: 52audio


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