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Jabra Evolve2 Buds true wireless headset dismantling, Qualcomm flagship Bluetooth audio SoC, dual-mode wireless connection

Jabra is a world-renowned manufacturer of innovative solutions for earphones and hands-free phones. It is also one of the earliest brands involved in the field of Bluetooth wireless technology. Its products include true wireless earphones, true wireless sports earphones, and headsets. And single-ear communication headsets, etc., covering many application scenarios, providing users with high-quality wireless audio products. Jabra Evolve2 Buds true wireless headset is a product of Jabra that mainly focuses on remote conference calls. Through 4 microphones + 2VPU bone conduction sensors + Jabra AI algorithm, it can intelligently filter unnecessary noise and provide high-quality call effects; equipped with The wireless receiver can effectively improve the sound quality and the stability of the call, and at the same time, the longer wireless connection range brings a more free call experience. Jabra Evolve2 Buds also supports active noise reduction, providing three-level noise reduction depth and five-level transparency mode, which can be customized and adjusted according to the surrounding noise environment; it supports Peakstop hearing protection, real-time monitoring of audio, and elimination of potentially harmful sound spikes. In terms of battery life, it supports a single music playback of about 8-10 hours/call time of about 5 hours, and the overall battery life can reach 33 hours. The charging box also supports wireless charging and has passed Qi certification, providing a more convenient charging experience. I love audio network has previously disassembled the Jabra ELITE 4 Active true wireless light sports headphones under the Jabra brand , Jabra ELITE7 Pro true wireless noise-canceling headphones , Jabra Elite2 true wireless headphones , Jabra Jabra ELITE 85t true wireless noise-canceling headphones Let ’s take a look at the detailed appearance design and internal structure configuration information of this product~ 

1. Jabra Evolve2 Buds true wireless headset out of the box

 The Jabra Evolve2 Buds true wireless headset packaging box is designed with a cover on the outside, and the front shows the application scene map of the headset, the brand LOGO and product name, as well as the main selling points designed for the office.  Various certification information is displayed on the back of the box.  The text on the side introduces the functional features of the product: Microsoft Teams application certification; MultiSensor Voice technology; USB receiver; compact design and comfortable wearing; 8-hour single battery life, 33-hour comprehensive battery life, fast charging; ANC active noise reduction.  The contents of the box include earphones, earplugs, charging cables and product manuals.  There are two silicone earplugs of different sizes, one pair is pre-installed on the earphone, and there are three sizes in total to meet the needs of different users.  The charging cable uses a USB-A to USB-C interface.  The charging box continues the family-style design, with a vertical structure and a flat top and bottom design, large arc transitions on both sides, matte coating, and a very delicate texture. There is an indicator light on the front for charging status feedback; the Microsoft Teams certification logo is printed on the lower left corner.  The USB-C charging interface is set on the back of the charging box.  The top of the charging box is designed with a bright silver brand LOGO.  The bottom is the wireless charging area, engraved with the “Qi” certification logo.  Open the cover of the charging box, in addition to the earphones, there is also a wireless receiver inside , which is portable and prevents loss.  Take out the earphones and wireless receiver , and you can see the internal structure of the cockpit. The cockpit is made of soft silicone material, which can well protect the earphones, prevent scratches, and reduce drop damage.  An overview of the overall appearance of the Jabra Evolve2 Buds true wireless headset.  The Jabra Evolve2 Buds earphones also adopt a family-style bean-shaped in-ear design, which is highly recognizable as a brand. The body curve is created by scanning 62,000+ human ears and analyzing them with data model methods. It fits comfortably and firmly with the ear canal.  The back panel of the fuselage is designed with the “Jabra” brand LOGO, which is also a physical button for controlling various functions.  A close-up of the opening of the feed-forward noise-canceling microphone on the top of the fuselage, 24 holes are precisely arranged.  A close-up of the call pickup microphone opening at the bottom of the phone.  The appearance of the inside of the fuselage is engraved with L/R left and right logos, which is convenient for users to quickly distinguish.  A close-up of the metal contacts for charging the headset, with an optical in-ear detection sensor in the middle.  Take off the earplugs, a close-up of the earphone outlet, and a back-feed noise-canceling microphone is installed inside to pick up the ambient noise inside the ear canal.  The appearance of the wireless receiver is very small, and it adopts the USB-A interface, which can be connected to notebooks, PCs and other devices for plug and play. The end of the fuselage is designed with “Jabra” brand LOGO and an indicator light.  The appearance of the other side of the wireless receiver is at a glance, and the certification mark is engraved on the plug.  According to the actual measurement of my love audio network, the weight of the Jabra Evolve2 Buds true wireless headset is about 63.7g.  A single earphone weighs about 5.5g.  The wireless receiver weighs only 1.7g.  I Love Audio Network uses CHARGERLAB POWER-Z KM002C to charge Jabra Evolve2 Buds true wireless noise-canceling headphones, and the input power is about 1.68W. 

2. Jabra Evolve2 Buds true wireless headset dismantling

 Through the unpacking part, we have a detailed understanding of the appearance design of the Jabra Evolve2 Buds true wireless headset. Next, enter the disassembly part to see its internal structure and hardware configuration information~ 

Disassembly of the charging box

 Remove the silicone cockpit.  A view of the bottom structure of the cockpit. There are two magnets on the back for absorbing the earphones. Cockpit engraving model “H09738A”.  An overview of 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.  A view of the structure at the bottom of the cavity, and a wireless charging coil is set in the central circular groove.  An overview of the top structure of the bracket. The main board and the power input board are fixed by buckles, and the two PCB boards are connected by a cable.  A view of the structure at the bottom of the bracket, where the wireless charging receiving coil is set.  The side structure of the bracket is at a glance, and the battery unit is fixed inside to achieve better protection.  Pick up the cable, remove the main board and the power input board.  Take out the battery unit, and disassemble the components on the bracket.  List of circuits on the main board side of the charging box.  Circuit overview on one side of the motherboard.  SGM Shengbang Micro ‎SGM41511 is an I2C controlled 3A single-cell battery charger with high input voltage capability and Narrow Voltage DC (NVDC) power path management, suitable 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.  SGM Shengbang micro ‎SGM41511 detailed information map.  Screen printing PP5 204 IC.  Screen printing D28 JL regulator IC.  Screen printing 1SOU boost IC, used to boost the built-in battery in the charging box to charge the earphones.  Cooperate with the boost IC to boost the power inductor for the built-in battery.  Silkscreen 42779 toggle switch.  A close-up of the Pogo Pin connector of the charging box for earphone charging.  ST STMicroelectronics STM32L072CB low-power MCU, based on Arm Cortex-M0+ 32-bit RISC core, frequency is 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 interfaces.  ST STMicroelectronics STM32L072CB detailed data map.  Screen printing D28 JL regulator IC. Screen printing M33 AR voltage regulator IC.  Silkscreen X2G IC.  A close-up of the socket where the battery leads are connected.  ConvenientPower Semiconductor 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, built-in 12-bit ADC for input and output Parameter collection. The chip has built-in rectifier overvoltage protection, LDO overcurrent protection and overheat protection, and is packaged in WLCSP-30. According to the dismantling of my love audio network, at present, products under the brands of OPPO , Xiaomi , Samsung , OnePlus , Belkin , Bird , and Astrid have adopted the wireless charging solution of Yichong Semiconductor.  Detailed data map of ConvenientPower Yichong Semiconductor CPS4019.  Screen printing PP5 204 IC.  A close-up of the cable connector used to connect the power input board.  A circuit overview of the side of the power input small board, equipped with a USB-C charging socket and a cable connector.  A list of the circuits on the other side of the small board, no components are set.  A close-up of the wireless charging receiving coil, set on the magnetic shielding sticker.  The built-in lithium battery in the charging box is wrapped with high-temperature insulating tape, model: VDL 912332, voltage: 3.8V, capacity: 770mAh 2.926Wh, from VDL Zijian Electronics.  A list of the circuits on one side of the battery protection board, equipped with Y1UD lithium battery protection IC and MOS tube, and a thermistor used to detect the battery temperature.  The other side of the battery protection board is spot welded to the positive and negative nickel sheets of the battery.  A close-up of the plug connecting the battery lead to the motherboard. 

Headphone disassembly

 Enter the earphone disassembly part and open the cavity along the parting line.  An overview of the internal structure of the rear cavity, with a motherboard unit.  Take out the main board unit.  A list of the internal structure of the cavity, the middle is the function button structure; the acoustic structure of the microphone is on both sides, and the anti-wind noise design is adopted to reduce the impact of wind noise; the gold contact is the electrode connecting the LDS laser antenna to the main board; the white circle is the indicator light guide beam of light.  Close-up of the rubber cap structure of the function button.  A list of circuits on one side of the headphone motherboard, with a shielding cover.  Remove the shielding cover, and set the step-down inductor below.  List of circuits on the other side of the motherboard.  A close-up of the Pogo Pin connector connected to the Bluetooth antenna.  Silkscreen Y7’s IC.  Silkscreen 42779 toggle switch.  A close-up of the jogging buttons on the motherboard.  Silk screen D18 AH Zener tube.  The VPU bone conduction sensor of the laser carving 224M1 is equipped with one on each of the left and right earphones, which is used to collect the vibration sound waves of the mandible. It is equipped with a pickup microphone and a call algorithm to achieve a clear voice call effect.  A close-up of the RGB LED indicator, which is used to feedback the headset Bluetooth pairing status and remaining battery information.  Qualcomm QCC5141 Bluetooth audio SoC is an ultra-low-power single-chip solution, which is packaged in WLCSP and has a smaller size; supports Bluetooth 5.2, with programmable DSP, optimized for true wireless headphones and hearing devices, Can support Qualcomm Snapdragon Sound Xiaolong smooth listening technology. Qualcomm QCC5141 combines high-performance audio with low power consumption, supports 24bit/96KHz high-resolution audio, supports Qualcomm aptX audio coding, including aptX Adaptive technology; supports aptX Voice to optimize call voice and the eighth-generation Qualcomm cVc echo cancellation and noise suppression Technology; supports Qualcomm adaptive active noise reduction functions, including feedforward, feedback, hybrid and adaptive, and supports third-party innovations through Qualcomm extensions. According to the dismantling of my love audio network, there are currently many TWS true wireless headsets, head-mounted, neck-mounted Bluetooth headsets, smart speakers, smart audio glasses and other audio products that use Qualcomm Bluetooth audio SoC .  Qualcomm Qualcomm QCC51XX series block diagram.  A close-up of the crystal oscillator that clocks the Bluetooth chip.  Metal dome connector for battery connection.  Another metal shrapnel used to connect to the battery.  The MEMS silicon microphone of laser carving D021 AT05 is used for voice pickup.  Silk screen 6AJI memory, used to store Bluetooth configuration and other information.  A close-up of the female BTB connector used to connect the small board.  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.  A close-up of the female BTB connector connected to the speaker cable. picture Acceleration sensor for silk screen QR code.  An overview of the internal structure of the front cavity of the earphone, and the battery unit is fixed on the upper layer.  Take out the battery, you can see the internal structure of the cavity, and the speaker goes deep into the sound tube. picture The wall of the cavity is provided with a metal connector for charging the earphone, a window for the in-ear detection sensor, and a magnet for fixing with the charging box. picture The earphone has a built-in steel shell button battery, model: M1254S3, voltage: 3.7V, capacity: 0.259Wh, from MIC-POWER micro-electric new energy.  A small PCB is fixed on the back of the battery.  The small board cable is connected to the main board through the BTB connector.  Two metal shrapnels connected to the metal connector on the housing to charge the earphones. picture A close-up of the optical in-ear detection sensor, which is used to realize the function of automatically pausing music when picking it up, and automatically resuming playing music when wearing it.  Screen printing 761FK1U1 integrated lithium battery protection IC.  Screen printing D30 AC regulator tube. picture Remove the cable, and the negative electrode of the battery is engraved with a QR code for product traceability. picture The back of the PCB is connected to the negative pole of the battery.  Take out the speaker unit.  The speaker is connected to the PCB board, and the rear feed noise-canceling microphone is set on the back. picture A close-up of the BTB connector male seat where the PCB cable is connected to the motherboard.  A close-up of the MEMS backfeed noise-canceling microphone of the laser carving AT21 8Y09, which is used to pick up ambient noise from inside the ear canal.  A close-up of the front diaphragm of the speaker.  A close-up of the back of the speaker, with a tuning hole in the middle, protected by a dust-proof net. picture The speaker is compared with the size of a dollar coin.  According to the actual measurement of my love audio network, the size of the speaker is about 5.37mm. 

Wireless Receiver Disassembly

 Disassemble the metal USB-A case of the wireless receiver and take out the motherboard unit.  A list of the circuits on the side of the motherboard, using the onboard printed Bluetooth antenna for signal transmission. picture A list of the circuits on the other side of the motherboard, soldering an indicator light.  A close-up of the metal contact on the tongue of the USB-A plug.  The wireless receiver uses Qualcomm QCC5126 Bluetooth audio SoC, which belongs to the QCC51XX series with the QCC5141 inside the headset. It has a quad-core processor architecture, a built-in dual-core DSP audio subsystem, low power consumption design, and supports digital active noise cancellation technology. Supports aptX Adaptive audio codec, which integrates enhanced features such as stability, good sound quality, scalability, low latency and low bit rate audio transmission. picture A close-up of the crystal oscillator that clocks the Bluetooth chip.  The wireless receiver also uses a screen-printed 6AJI memory.  Jabra Evolve2 Buds true wireless noise-cancelling headphones dismantling family portrait. 

3. Summary of I Love Audio Network

 In terms of appearance, the Jabra Evolve2 Buds true wireless earphones continue 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 box adopts a unique silicone cockpit structure, which can better protect the earphones; the earphones adopt a bean-shaped in-ear design, which is small and light in size, and fits comfortably and firmly in the ear canal. In terms of internal structure configuration, the charging box has a built-in VDL Zijian Electronics 770mAh lithium battery, which supports wired/wireless charging for the battery. Wired charging uses SGM SGM41511 charging IC, which supports fast charging and I²C programming; wireless charging uses ConvenientPower Easy Chong Semiconductor CPS4019 high-efficiency wireless charging receiving chip, power 5W, built-in rectifier overvoltage protection, overcurrent protection and overheating protection ; ST STMicroelectronics STM32L072CB low-power MCU is also used for the control of the charging box. The internal structure of the headset is exquisitely designed, and the components are stacked layer by layer, which makes good use of the limited space inside the headset, and is connected through connectors, which is easy to assemble. In terms of main configuration, it is equipped with a 5.37mm dynamic unit, and each ear is equipped with 3 MEMS microphones + 1 VPU bone conduction sensor, which is used for hybrid active noise reduction, voice calls, and call noise reduction functions; it uses a steel shell button battery , capacity 0.259Wh, provided by MIC-POWER micro electric new energy. The headphone main control chip adopts Qualcomm QCC5141 Bluetooth audio SoC, supports Bluetooth 5.2, supports Qualcomm aptX, aptX Voice, the eighth-generation Qualcomm cVc echo cancellation and noise suppression, adaptive active noise reduction and other technologies, providing high-quality wireless audio for the headset Experience; the wireless receiver uses Qualcomm QCC5126 Bluetooth audio SoC, with QCC5141, to provide stable wireless connection, high-definition sound quality and low latency.

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