Jabra Evolve2 Buds is a true wireless earphones under the Jabra that mainly focuses on remote conference calls. Through 4-Mic+2VPU bone conduction sensor+Jabra AI algorithm, it intelligently filters unnecessary noise and provides high-quality call effects. Equipped with a wireless receiver, it can effectively improve the sound quality and call stability. At the same time, the farther wireless connection range brings a more free call experience.
Jabra Evolve2 Buds supports the active noise cancellation function, providing three levels of noise reduction depth and five levels of transparency mode, which can be customized and adjusted according to the surrounding noise environment. Supports Peakstop hearing protection, which monitors audio in real time and eliminates potentially harmful sound spikes. In terms of battery life, the single battery life is 8-10 hours of music playback/5 hours of talk time, and the overall battery life can reach 33 hours. The charging case supports wireless charging and has passed Qi certification, providing a more convenient charging experience.
We have previously teardown the Jabra products including: Jabra ELITE 4 Active, Jabra ELITE7 Pro, Jabra Elite2 and Jabra ELITE 85t. Let’s take a look at the detailed appearance design and internal structure configuration information of this product.
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$269 – Jabra Evolve2 Buds Review
01/ Jabra Evolve2 Buds charging case teardown
Remove the silicone charging cockpit.
The internal structure of the cavity, the internal components are fixed on the red bracket and fixed by screws.
Remove the screws and take out the stand.
The top structure of the bracket fixes the main board and the power input small board through buckles, and connects the two PCB boards through a flat cable.
The bottom structure of the bracket is equipped with a wireless charging receiving coil.
The side structure of the bracket fixes the battery unit inside for better protection.
Open the flat cable, remove the main board and the power input board.
Take out the battery, all components on the stand.
The circuit on the side of the motherboard of the charging case.
The circuit on the other side of the charging case motherboard.
SGM SGM41511 is an I2C controlled 3A single-cell battery charger with high input voltage capability and Narrow Voltage DC (NVDC) power path management for single-cell Li-ion or Li-polymer batteries. The SGM41511 supports fast charging and supports a wide input voltage range for smartphones, tablets, and portable systems. I²C programming makes it a very flexible solution for power supply and charger designs.
Screen printing PP5 204 IC.
Screen printing D28 JL regulator IC.
Silkscreen 1SOU boost IC, used to boost the built-in battery of the charging case to charge earbuds.
Cooperate with the boost IC to boost the power inductor for the built-in battery.
Silkscreen 42779 toggle switch.
The charging case is the Pogo Pin connector for charging earbuds.
ST STM32L072CB low-power MCU. Based on Arm Cortex-M0+ 32-bit RISC core with a frequency of 32 MHz, built-in memory protection unit (MPU), high-speed embedded memory (up to 192 KB of flash memory, 6 KB of EEPROM and 20 KB of SRAM) and various enhanced I /O interface.
Screen printing D28 JL regulator IC.
Screen printing M33 AR voltage regulator IC.
Silkscreen X2G IC.
Socket for connecting battery leads.
ConvenientPower CPS4019 high-efficiency wireless charging receiving chip, supports 5W wireless charging receiving. The chip integrates a synchronous rectifier and a low-dropout voltage regulator for charging system devices and batteries, providing a good experience for devices powered by built-in batteries.
CPS4019 integrates 8051 core, built-in 16KB MTP memory and 2KB SRAM, supports advanced power management and ultra-low standby power consumption. The chip has I²C pins and GPIO pins, supports output voltage adjustment, and has a built-in 12-bit ADC for collecting all parameters of input and output. The chip has built-in rectifier overvoltage protection, LDO overcurrent protection and overheat protection, and is packaged in WLCSP-30.
Screen printing PP5 204 IC.
Flat cable connector for connecting to the power input board.
The circuit on one side of the power input board is provided with a USB-C charging socket and a flat cable connector.
The wireless charging receiving coil is set on the magnetic shielding sticker.
The built-in lithium battery in the charging case is wrapped with high-temperature insulating tape, model: VDL 912332, voltage: 3.8V, capacity: 770mAh 2.926Wh, from VDL.
The circuit on one side of the battery protection board is equipped with a Y1UD lithium battery protection IC, a MOS tube, and a thermistor for detecting the battery temperature.
02/ Jabra Evolve2 Buds earphones teardown
Enter the teardown part of the earphone and open the cavity along the parting line.
The internal structure of the earphone rear cavity is provided with a motherboard unit.
The inner structure of the cavity, and the function button structure in the middle. On both sides are the acoustic structure of the microphone, which adopts an anti-wind noise design to reduce the impact of wind noise. The golden contact is the electrode that connects the LDS laser antenna to the motherboard. The white circle part is the indicator light guide column.
The circuit on one side of the earphone motherboard is provided with a shielding cover.
Remove the shielding cover, and set the step-down inductor below.
The circuit on the other side of the headphone motherboard.
Pogo Pin connector to connect the bluetooth antenna.
Silkscreen Y7’s IC.
Silkscreen 42779 toggle switch.
The micro button on the main board.
Silk screen D18 AH Zener tube.
Laser carving 224M1 VPU bone conduction sensor. The left and right earbuds are each equipped with one earbud, which is used to collect the vibration sound waves of the mandible, and is equipped with a pickup microphone and a call algorithm to achieve a clear voice call effect.
RGB LED indicator for feedback of bluetooth pairing status and remaining battery information.
The Qualcomm QCC5141 bluetooth audio SoC is an ultra-low power single-chip solution in a WLCSP package with a smaller size. Supports Bluetooth 5.2, with programmable DSP, optimized for true wireless earbuds and hearing devices, can support Qualcomm Snapdragon Sound technology.
Qualcomm QCC5141 combines high-performance audio with low power consumption, supports 24bit/96KHz high-resolution audio, Qualcomm aptX and aptX Adaptive technology. It supports aptX Voice optimized call voice and the eighth-generation Qualcomm cVc echo cancellation and noise suppression technology. Support Qualcomm adaptive ANC functions, including feedforward, feedback, hybrid and adaptive, and support third-party innovation through Qualcomm extensions.
According to 52audio, there are many TWS earbuds, over-ear headphones, neck-mounted earphones, smart speakers, smart audio glasses and other audio products that have adopted Qualcomm bluetooth audio SoC.
The crystal oscillator that provides the clock for the bluetooth chip.
Metal dome connector for battery connection.
The MEMS microphone of laser carving D021 AT05 is used for voice call pickup.
Silk screen 6AJI memory, used to store bluetooth configuration and other information.
BTB connector female for connecting small boards.
Another laser engraving D021 AT05 MEMS feedforward noise reduction microphone is used for noise reduction to pick up external environmental noise.
Silk screen C 1GR IC.
Connect to the female BTB connector of the speaker flat cable.
Acceleration sensor for silk screen QR code.
The internal structure of the front cavity of the earphone, and the battery unit is fixed on the upper layer.
Take out the battery, the internal structure of the cavity, and the speaker goes deep into the sound tube.
A metal connector for charging the earphone, a window for the in-ear detection sensor, and a magnet for fixing the charging case are arranged on the wall of the cavity.
The earbud has a built-in steel shell button battery, model: M1254S3, voltage: 3.7V, capacity: 0.259Wh, from MIC-POWER.
A small PCB is fixed on the back of the battery.
The small board flat cable is connected to the motherboard through the BTB connector.
Two metal dome connected to the metal connector on the shell to charge the earbuds.
Optical in-ear detection sensor for auto-pause/resume music playback.
Screen printing 761FK1U1 integrated lithium battery protection IC.
Screen printing D30 AC regulator tube.
Remove the flat cable, and the negative electrode of the battery is engraved with a QR code for product traceability.
The speaker is connected to the PCB board, and the rear feed noise-canceling microphone is set on the back.
The flat cable of the PCB board is connected to the BTB connector male seat of the motherboard.
Laser Engraving AT21 8Y09’s MEMS backfeed noise-canceling microphone is used to pick up ambient noise from inside the ear canal.
The diaphragm on the front of the speaker.
On the back of the speaker, there is a tuning hole in the middle, which is protected by a dust filter.
After actual measurement, the size of the speaker is about 5.37mm.
03/ Wireless receiver teardown
Disassemble the metal USB-A case of the wireless receiver and take out the motherboard unit.
The circuit on the side of the motherboard uses the onboard printed bluetooth antenna for signal transmission.
On the other side of the motherboard, solder an indicator light.
The wireless receiver uses Qualcomm QCC5126 bluetooth audio SoC, which belongs to the QCC51XX series as the QCC5141 inside the earphone. Quad-core processor architecture, built-in dual-core DSP audio subsystem, low power consumption design. It supports digital active noise cancellation technology and aptX Adaptive codec, and integrates enhanced features such as stability, good sound quality, scalability, low latency and low bit rate audio transmission.
The crystal oscillator that provides the clock for the bluetooth chip.
The wireless receiver also uses a screen-printed 6AJI memory.
Jabra Evolve2 Buds true wireless noise cancellation earphones all components.
04/ Summary
The appearance of Jabra Evolve2 Buds continues the family-style design style, which is unique and highly recognizable. The overall shell has a matte texture, and the coating is delicate to the touch, making it comfortable to hold and wear. The charging case adopts a unique silicone cockpit structure, which can better protect earbuds. The earbud adopts the bean-shaped in-ear design, which is small and light, and fits comfortably and firmly to the ear canal.
In terms of internal structure and configuration, the charging case has a built-in VDL 770mAh lithium battery, which supports both wired and wireless charging methods. Wired charging uses SGM SGM41511 charging IC, which supports fast charging and I²C programming. Wireless charging adopts ConvenientPower CPS4019 high-efficiency wireless charging receiving chip, power 5W, built-in rectifier overvoltage protection, overcurrent protection and overheating protection. The ST STM32L072CB low-power MCU is used for charging case control.
The internal structure of the earbud is exquisitely designed, and the components are stacked layer by layer, which makes good use of the limited space inside the earbud, and is connected through connectors, which is easy to assemble. In terms of main configuration, it is equipped with a 5.37mm dynamic driver, and the single earbud is equipped with 2 MEMS microphones + VPU bone conduction sensors, which are used for hybrid ANC, voice calls, and call noise reduction functions. It adopts a steel shell button battery with a capacity of 0.259Wh, provided by MIC-POWER.
The earbud main control chip adopts Qualcomm QCC5141 bluetooth audio SoC, supports Bluetooth 5.2, Qualcomm aptX, aptX Voice, the eighth-generation Qualcomm cVc echo cancellation and noise suppression, adaptive ANC and other technologies, providing high-quality wireless audio experience for earbuds. The wireless receiver uses Qualcomm QCC5126 bluetooth audio SoC, which is matched with QCC5141 to provide stable wireless connection, high-definition sound quality and low latency.
Source: 52audio
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