Jabra Elite 8 Active is a true wireless sports earbuds focusing on outdoor scenes. It supports IP68 waterproof and dustproof, has passed military testing and certification, is waterproof, cold-resistant and impact-resistant, and is fearless in any usage scenario. Equipped with a 6mm titanium-plated dynamic driver, it supports Dolby sound effects and provides more powerful immersive surround sound.
In terms of noise cancelling, it supports adaptive double-feed noise cancelling, which improves the noise cancelling effect by 1.6 times compared to the previous generation. Supports smart wind noise balance technology, which is automatically activated when excessive external wind noise is detected to suppress wind noise interference. Supports 6-mic call noise cancelling, based on double-feed noise cancelling technology and directional ultra-clear microphone pickup, providing clear call effects. The single battery life after turning off ANC mode is up to 14 hours, and the comprehensive battery life is up to 56 hours. It also supports fast charging and wireless charging functions.
We have also previously teardown the Jabra products including: Jabra Evolve2 Buds, Jabra ELITE 4 Active, Jabra ELITE7 Pro, Jabra Elite 2 and Jabra ELITE 85t. Let’s take a look at the detailed teardown report of Jabra Elite 8 Active.
01/ Jabra Elite 8 Active Charging Case Teardown
Take out the silicone charging bin structure. There are 5 magnets on the inside of the charging bin for adsorbing and fixing earbuds and charging case lid. The edges of the charging bin are sealed with glue to improve waterproof performance.
The internal structure of the cavity secures all components with screws and frames.
Remove the screws and take out the frame and all components.
The top structure of the frame is equipped with a small board for charging earbuds, a Hall element, and an indicator light FPC. There is a battery inside the frame, which provides good protection.
The motherboard is fixed at the bottom of the frame, and the Type-C charging interface is protected by a rubber cover.
Frame front FPC structure.
A wireless charging receiving coil is set on the back of the frame.
Remove the motherboard, battery and the small board that charges the earbuds.
The circuit on the side of the charging case motherboard.
The circuit on the other side of the charging case motherboard is soldered to the battery and wireless charging receiving coil wires.
The motherboard connects to the FPC’s ZIF connector.
NuVolta NU1680 is a small-sized, highly integrated wireless power receiver. A synchronous rectifier is integrated internally, eliminating the need for external bootstrap capacitors and featuring high efficiency and low cost. It can provide a wide range of regulated voltage from 3.5V to 9V, suitable for different applications. The output voltage can be adjusted to track the battery voltage and reduce the power consumption of the charging system.
NU1680 can communicate with the transmitting system through ASK, and the communication complies with WPC V1.2.4. FOD parameters are configurable through the I2C interface or external resistors. NU1680 also supports I2C interface for communication. Provides external interrupts, battery voltage ADC value, output current, etc. NU1680 also supports standard protection functions such as over-current protection, short-circuit protection, over-voltage protection and thermal shutdown.
Chipsea CS32F035 microcontroller uses a high-performance 32-bit ARM Cortex-M0 core, embedded with up to 32Kbytes flash and 4Kbytes SRAM, and has a maximum operating frequency of 48MHz. The CS32F035/F036 series covers a variety of products from 20 pins to 32 pins. The chip provides standard communication interfaces (I2C, SPI and USART), 1 12bit ADC, 5 16bit timers, and 1 enhanced control PWM timer. The operating temperature range is -40℃~85/105℃, and the operating voltage range is 2V~5.5V.
TPS SY8803 intelligent charging bin solution is a single-chip solution specially designed for headset charging bin. The chip integrates a charging module and a discharging module, and the charging current and discharge cut-off current can be adjusted externally. The chip integrates a standard I2C interface and interrupt signal to facilitate communication between the chip and the MCU. At the same time, the chip also provides load detection and load insertion identification.
SY8803 is very suitable for the design of headset charging bin, simplifying the peripheral circuits and components, and providing a simple and easy-to-use solution for charging bin applications. SY8803 is packaged in QFN16.
A boost inductor that works with the power management chip to boost the voltage for earbuds charging.
Silk screen AM GK IC.
The circuit on one side of the small board that charges the earbuds is soldered to the motherboard FPC.
The circuit on the other side of the small board that charges the earbuds.
Pogo Pin connector for charging earbuds.
LED lamp beads corresponding to the indicator lights on the charging bin.
The hall element of silk screen 8891J is used to sense the magnetic field changes when the charging case lid is on/off, and then notify the charging case MCU and earbuds to pair or disconnect with the connected device.
Corresponds to the LED indicator light on the charging case.
The built-in lithium battery in the charging case is protected by high-temperature insulating tape. Battery model: VDL 731646PN3, nominal voltage: 3.8V, rated capacity: 680mAh 2.58Wh, from VDL.
Peel off the insulation protection and the circuit on the side of the battery protection board. It is equipped with lithium battery protection IC, MOS tube, and thermistor to detect battery temperature.
Silk screen 3WA AL1C lithium battery protection IC is responsible for battery overcharge, overdischarge, and overcurrent protection. The MOS tube on the left is protected by black hard glue.
02/ Jabra Elite 8 Active Earbuds Teardown
Remove the liquid silicone earbud cover, and the LDS laser antenna is printed on the back cover of the earbuds.
Remove the back cover. The microphone pickup hole on the inside of the cover is equipped with a dust filter.
The internal structure of the cavity fixes the battery and motherboard through brackets. The motherboard and FPC are connected through the BTB connector.
Unhook the connector and take out the motherboard.
The mainboard is fixed with buckles on the top of the bracket, and both sides of the mainboard are welded to the positive and negative nickel sheets of the battery.
The soft-packed button battery is fixed inside the bracket, which provides good protection.
Separate the motherboard and battery.
The earbud has a built-in soft-pack button battery model: 1255H, nominal voltage: 3.85V, rated capacity: 70mAh 0.27Wh.
The circuit on one side of the earbud motherboard.
The circuit on the other side of the earbud motherboard.
Metal dome for connecting bluetooth antenna.
Micro buttons for function control.
Silk screen 2b HQ integrated lithium battery protection IC.
BTB connector to connect the speaker FPC, from OCN, model: OK-114GF016-35.
Silk screen E63F IC.
Silk screen A SN IC.
The MEMS microphone of Laser Engraving MF17 D154 is a call microphone, used for voice call function pickup, from MEMSensing.
Silk screen C 2DC IC.
AIROHA AB1585 bluetooth audio SoC supports LE Audio and Bluetooth 5.3. Integrated ARM Cortex-M33F application processor, HiFi 5 DSP, bluetooth transceiver and power management unit (PMU). Supports hybrid active noise cancelling (ANC), new generation echo cancellation and AInoise cancelling solutions to improve the audio quality of headset voice calls. Supports Airoha MCSync technology, allowing seamless switching between headphones for more balanced sound and low latency.
The peripheral inductor of the bluetooth chip supplies power to its internal circuit.
A 26.0MHz crystal oscillator provides the clock for the bluetooth chip.
Another laser-engraved MEMS microphone, MF17 D154, is a feed-forward noise cancelling microphone, used to pick up external environmental noise, which comes from MEMSensing.
For the internal structure of the front cavity, the FPC is fixed by a metal cover.
Take out the FPC inside the front cavity.
Charging contacts, in-ear detection sensor window, and two magnets under the FPC.
The circuit on the FPC side inside the front cavity.
The circuit on the other side of the FPC.
The BTB connector that connects the FPC to the motherboard is from OCN, model number: OK-114GM016-35.
The front of the earbud speaker is protected by a metal mesh. According to the official introduction, it uses a new composite material dynamic driver and is blessed with small speaker volume enhancement technology to burst out stronger music energy.
After actual measurement, the speaker size is about 6mm.
Capacitive in-ear detection sensor is used to automatically pause music playback when taking off the earbuds, and automatically resume playback after wearing them.
Optical in-ear detection sensor. The combination of the two sensors provides more accurate monitoring results.
The metal dome to which the charging contacts are connected.
The MEMS microphone of Lasdiao MF09 D112 is a feedback noise cancelling microphone, which cooperates with the feedforward noise cancelling microphone to provide better noise cancelling effect.
All components of Jabra Elite 8 Active noise canceling earphones.
03/ Summary
Jabra Elite 8 Active continues the family-style design style and has high brand characteristics. The charging case adopts a round top and bottom design, and a unique silicone charging bin inside, which protects the earbuds well. The earbuds adopt a teardrop-shaped design without earwings, are compact in size, and are fully wrapped with a skin-friendly liquid silicone coating, making them comfortable and stable to wear.
The charging case has a built-in 680mAh lithium battery and supports wired and wireless charging solutions. The wired solution uses a Type-C interface and a TPS SY8803 smart charging compartment solution that integrates charging modules and discharging modules. The wireless solution uses NuVolta NU1680 wireless power receiver. Equipped with Chipsea CS32F035 microcontroller for charging case control.
The earbud is equipped with a 70mAh soft-pack button battery and a 6mm titanium-plated diaphragm dynamic driver. A single earbud has three built-in MEMS microphones for voice calls and noise cancelling function. The main control chip is AIROHA AB1585 bluetooth audio SoC, which supports LE Audio, Bluetooth 5.3, hybrid active noise canceling (ANC), new generation echo cancellation and AI noise canceling.
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