Baseus Bowie E2 true wireless earphones teardown

0
241

52audio recently got the new “Bowie E2 True Wireless Earphones” from consumer electronics brand Baseus. The earphones adopt the appearance design of mini candy beans, and the weight of a single earphone is about 4.4g, which is suitable for young people who like high level of appearance earbuds.

The earphones have built-in high-elastic PU composite diaphragm dynamic, which can bring users a more balanced hearing. Earphone adopts Bluetooth 5.2 main control chip and Baseus dual-channel low-latency technology, which compresses the latency to 60ms to improve the user’s film and television experience. At the same time earphones also support the function of single ear positioning within the range. In terms of battery life, the earbuds have a single battery life of up to 5 hours. With the charging case, a total of 25 hours of long battery life can be obtained, and it supports fast charging of “10 minutes of charging and 2 hours of listening to songs”. Baseus Bowie E2 earbuds are also equipped with the “Baseus Smart” App, which supports earphones operation customization.

The Baseus TWS earbuds disassembled by 52audio are: Baseus AirNora, Baseus Encok W01, Baseus Encok W04 Pro, Baseus Encok W07, Baseus Encok W09 and Baseus Encok WM01 true wireless bluetooth earbuds.


|1. Baseus Bowie E2 true wireless earphones unboxing

The Baseus E2 true wireless earphones box has a simple design as a whole, with product renderings of earbuds and charging case on the front. The upper left corner is the Baseus brand logo in yellow, and the lower right corner is the product name “Bowie E2”.

The picture on the side of the box shows: the product is designed with mini candy bean, supports Baseus Flash Charge, and Positioning via an App.

Information on the bottom of the box.

Product name: Baseus TWS true wireless bluetooth earphones; model: Baseus Bowie E2; material: ABS+PC; Bluetooth version: V5.2; communication distance: 10 meters; listening time: about 5 hours (70% volume); with charging Case listening time: about 20-25 hours.

Battery capacity: 40mAh/0.148Wh (earphones) 300mAh/1.11Wh (charging case); rated input: DC5V⎓70mA; charging case rated input: DC5V⎓500mA.

Earphone rated current consumption: 8mA; charging case rated current consumption: 100mA; charging time: about 1.5 hours; frequency response range: 20Hz-20KHz; charging interface: Type-C; applicable: playback devices with bluetooth function.

Open the box and remove all accessories. Accessories list: Four pairs of eartips (XS/S/M/L), manual*1, USB A to C charging cable*1.

USB A to C charging cable.

The included eartips are designed to be fully wrapped in the fuselage.

On the front of the charging case, there is a groove at the opening and closing for finger operation, and under the groove is an indicator light for the charging case status.

The top of the charging case, no other design is done.

The Type-C interface for charging the charging case is located behind the charging case.

The bottom of the charging case is printed with “CE certification”, “FCC certification” and a sign that prohibits littering.

Open the charging case.

charging case cover silkscreen information, model: Baseus Bowie; made in China; headphone battery capacity 40mAh/0.148Wh, input 5V⎓70mA; charging case capacity 300mAh/1.11Wh, input 5V⎓500mA.

Baseus Bowie E2

The earphones in the charging case have a compact overall layout.

The L/R logo is designed on the headphone cockpit to facilitate the distinction between left and right ears.

There is a button for earphone pairing in the middle of the earphone cockpit.

Contacts for charging earphones.

On the outside of the earphone, the overall design is similar to candy beans.

The headphone microphone pickup hole is equipped with a fine dust-proof net to prevent foreign objects from entering the headphone sound cavity.

Inside the earphone.

Metal contacts for charging earphones.

The bar-shaped tuning hole on the side of the earphone is used to balance the air pressure inside and outside the earphone and enhance the acoustic performance of the earphone.

There is an L/R logo on the earphone for users to distinguish the left and right ears.

Another tuning hole near the earphone filter is also used to balance the air pressure inside and outside the earphone to enhance the acoustic performance of the earphone.

The earphone sound hole is equipped with a fine dust filter to prevent foreign matter from entering the earphone sound cavity.

After actual measurement, the overall weight of the Baseus Bowie E2 earbuds and charging case is about 38.3g.

The weight of a single earphone is about 4.6g.

Use a portable power tester to test the Baseus Bowie E2 wired charging, the charging voltage is about 4.96V, the charging current is about 0.43A, and the charging power is about 2.13W.


|2. Baseus Bowie E2 charging case teardown

First remove the earphone bottom case along the parting line.

The charging case motherboard and the battery are fixed at the bottom of the headphone cockpit.

The main board of the charging case is fixed on the back of the headphone cockpit by screws, and the battery wire is soldered to one side of the main board and fixed with white glue.

Unscrew the screw and remove the charging case motherboard.

On the back of the headphone cockpit, there are 4 magnets for attaching the earphone.

The front of the charging case motherboard.

The back of the charging case motherboard.

The button board connected to the main board, there is a micro button on the small board corresponding to the button on the cockpit of the charging case, which is used for earphone pairing.

The charging case battery is from JHY, model 702025, rated voltage 3.7V, rated capacity 300mAh/1.110Wh.

Type-C charging interface female socket.

Pogo pin connector for charging earphone.

3R3 boost inductor, cooperate with the power management chip to boost to charge the earphones.

TPS SY8801 TWS earphone charging case SOC, specially designed for TWS earphone charging case. Based on the design to ensure safety and high reliability (supports 28V input withstand voltage, built-in full-function charging and discharging overvoltage, overcurrent, overtemperature, short circuit protection, etc.), it also integrates I2C communication function and internal communication isolation function . Through the I2C interface, the MCU of the system can read and configure the internal functions of the power supply and the parameters of battery charge and discharge management, and easily realize such as NTC protection, segmental adjustment of battery current, TWS earphone entry and exit detection, and automatic power output. and other functions.

The integrated internal communication isolation module of TPS SY8801 greatly optimizes the functional design of the smart TWS charging compartment. No complicated peripheral circuits are required, and the MCU can be realized by connecting and controlling the SY8801. It can not only realize the function of charging the earphone, but also transmit data through the POGO PIN of the power supply connected to the earphone, and realize functions including uploading the power of the charging compartment, clearing and pairing the earphone in the charging compartment, restoring the factory settings, and upgrading the earphone software.

According to 52audio, the power management chip of TPS has been adopted by Xiaomi, OPPO, OnePlus, realme, Transsion, MEIZU, 1MORE, Baidu, Edifier, JBL, Harman, Lenovo and other brands.

Chipsea CSU32P20 8-bit RISC OTP MCU with 12-bit ADC, built-in 2K×16-bit OTP program memory, 104-byte SRAM, used for charging case function control.

The battery is equipped with a circuit protection board, which has ICs, MOS tubes and thermistors to protect the circuit.


|3. Baseus Bowie E2 TWS earphones teardown

First, pry open the front and rear shells of the headphone along the parting line.

The internal structure of the earphone’s back shell, and the upper part is the acoustic sealing structure corresponding to the microphone pickup hole, which enhances the pickup performance of the microphone. A touch-sensitive touch patch is arranged in the middle of the rear shell, and the periphery of the touch patch is a bluetooth antenna.

The earphone motherboard is set above the earphone front shell.

Take out the earphone motherboard and fix the battery on the back of the motherboard.

The magnet inside the earphone’s front shell is fixed with transparent glue.

Remove the earphone battery, the front of the earphone motherboard.

The back of the earphone motherboard.

Soft pack battery silk screen information, model 451012, rated capacity 37mAh.

A metal post for charging earphones.

BLUETRUM BT8922D bluetooth audio SoC, using 40nm ULP process, built-in 32-bit high-performance RISC-V CPU, supports DSP instructions and neural network accelerators, built-in multiple small cores to form a multi-core architecture, effectively reducing power consumption. Built-in 2MB Flash storage unit, support FOTA, end users can upgrade earphone firmware through APP. Built-in GPIO pins, flexibly programmable pull-up or pull-down, support GPIO wake-up or interrupt. Built-in high-performance bluetooth RF circuit, the wireless receiving sensitivity reaches -94dBm, and the transmit power is greater than 10dBm, which meets different product designs and antenna structures.

BT8922D supports sound plus single MIC DNN call algorithm, providing users with a clear call experience. It supports Bluetooth 5.2 dual-mode, integrates step-down and lithium battery charging functions, and has built-in low-power touch buttons, which helps to achieve a streamlined earphone design.

According to 52audio, brands such as Monster, HYMALAYA, MEIZU, NOME, Transsion, LeTV, Lenovo, Philips, 360, Fantini, and AMOI have adopted BLUETRUM solutions in large numbers.

BLUETRUM BT8922D bluetooth audio SoC details.

The clock crystal oscillator of silk screen “J.G” provides the clock for the bluetooth chip.

A step-down inductor outside the chip.

Integrated battery protection IC with silkscreen “0uB3”.

Laser engraved “G481 0J99” MEMS microphone for earphone’s voice call pickup.

The metal dome used to connect the earphone’s front shell touch patch, and the back is the bluetooth antenna contact.

EShine CT8233LF single-key touch IC, with LDO, reset time 16S, used for earphone touch control.

Remove earphone speaker housing.

Back of earphone speaker.

Take the earphone speaker out of the speaker housing, and the internal structure of the speaker housing.

After actual measurement, the size of the Baseus Bowie E2 earphones speaker unit is about 11.80mm.

All components of Baseus Bowie E2 true wireless earphones.


Summary:

In terms of appearance, the Baseus Bowie E2 true wireless earphones have a more compact internal layout of the charging case to achieve a smaller overall volume. The design of earphones is similar to candy beans, and the weight of a single earphone is only 4.6g, which can bring users a lightweight wearing experience.

In terms of internal configuration of the charging case, the battery comes from JHY, model 702025, with a rated capacity of 300mAh/1.110Wh, which can provide users with an additional 20 hours of battery life. Using TPS SY8801 TWS earphone charging bin SOC, which is specially designed for TWS earphone charging bin, can realize the fast charging technology of earphones “charging for 10 minutes and listening to songs for 2 hours”, while also ensuring the stability of charging. The charging caseMCU adopts CHIPSEA CSU32P20, 8-bit RISC OTP MCU with 12-bit ADC, built-in 2K×16-bit OTP program memory, and 104-byte SRAM, bringing a smooth interactive experience.

In terms of internal configuration of earphones, the bluetooth SoC adopts BLUETRUM BT8922D bluetooth audio SoC, built-in 32-bit high-performance RISC-V CPU, supports FOTA, and end users can upgrade earphone firmware through APP. Support Sound+ single-MIC DNN call algorithm to provide users with a clear call experience. It supports Bluetooth 5.2 dual-mode, integrates step-down and lithium battery charging functions, and has built-in low-power touch buttons, which help to achieve a streamlined headphone design. The earphone touch chip comes from EShine CT8233LF single-button touch IC with built-in LDO, which can effectively prevent earphone from accidentally touching.

Source: 52audio


Check lowest price of Baseus Bowie E2:

LEAVE A REPLY

Please enter your comment!
Please enter your name here