Haylou is an independent brand of Liesheng Technology including “wireless audio, smart wear, IOT” and other categories. Its true wireless bluetooth earbuds is designed with the concept of “innovation and high cost performance”, and it has a good sales volume on foreign e-commerce platforms.
52audio got a new earphone from Haylou——Haylou X1 Pro. The appearance of the headphone charging case adopts a space capsule design, supports Bluetooth 5.2, -35dB Hybrid ANC, and 3-mic smart noise cancelling. A low-latency mode is designed for gamers to meet user needs. In terms of battery life, earbuds can reach 40 hours of battery life with the charging case. Next, let’s teardown this earphone and see what’s special in the earphone after teardown.
|2. Haylou X1 Pro charging case teardown
After reading the cool appearance of Haylou X1 Pro, let’s take a look at the teardown of the product.
First separate the earphone cockpit from the charging case bottom case.
The battery is fixed on the motherboard on the back of the earphone cockpit.
The bottom of the earphone cockpit is equipped with a Type-C charging interface female socket.
The micro-buttons on the motherboard are set on the side of the earphone cockpit.
The charging case motherboard is screwed to the back of the earphone cockpit.
Unscrew the screws to remove the charging case mainboard. There are two charging boards under the charging case mainboard which are installed on the earphone cockpit.
Remove the two charging boards, and completely separate the charging case mainboard from the earphone cockpit.
The internal structure of the earphone cockpit is equipped with 2 magnets for adsorbing the earphone. Another large magnet is used to attract the top cover of the charging case.
Remove the battery from the mainboard of the charging case, there is a double-sided tape on the back of the mainboard to fix the battery.
Charging case battery information, battery model 512726, rated capacity 1.48Wh/400mAh, rated voltage 3.7V.
The back of the charging case motherboard is close, and under the battery is a thermistor that detects the battery temperature.
Thermistor to ensure that the battery is charged and discharged within the normal temperature range.
The front of the charging case motherboard.
The pogo pin connector for charging earphones is designed on a separate charging pad.
The Type-C charging interface on the mainboard of the charging case.
The jog buttons on the motherboard of the charging case.
The LPS LP6261 ultra-low static current synchronous boost converter is used to boost the built-in battery in the charging case to charge earphones.
LP6261 has a TRUE shutdown function, which can disconnect input and output under shutdown and output short-circuit conditions. The 1.2MHZ switching frequency can use small-sized inductors and capacitors. The switch pin adopts a high-voltage 9V process, which can effectively absorb the production capacity of the earphone when plugging and unplugging. High voltage spikes. At the same time, the LP6260 has no whistling sound within the full load capacity range (especially at light load).
The LP6261 consumes only 1UA of quiescent current under light load conditions, achieves up to 75% efficiency under 20uA load, and up to 93% conversion efficiency from 3.3V to 5V under 200mA load.
According to 52audio, a large number of audio products from Xiaomi, OPPO, Huawei, Lenovo, Motorola, realme, Edifier, QCY, JLab, Skullcandy, Boltune and other brands have adopted the LPS power management solution.
XySemi XB5335A1C battery protection IC.
Silkscreen 10WA linear charging chip for charging the built-in lithium battery in the charging case.
The 2 LED indicators of the charging case are set on the FPC cable.
The hall element of “AR1F1” silkscreened on the FPC cable is used to sense the opening and closing of the charging case to realize the function of the earphone open the box and pair devices automatically.
ZIF connector for connecting FPC cable, model OK-F501-06325.
Screen-printed “T12 003” TVS protection tube for input overvoltage protection.
An unmarked MCU is used to control the whole charging case.
|2. Haylou X1 Pro earphones teardown
After reading the teardown of the charging case, let’s take a look at the teardown of earphones.
First let’s remove the earphone front cavity along the parting line.
There is a lot of glue in the front cavity of the earphone to fix the speaker unit, magnet and noise cancelling microphone.
The earphone’s battery is installed in the back cavity of the earphone.
Take out the circuit in the front cavity of the earphone.
The internal structure of the front cavity of the earphone.
The front of the speaker unit is provided with a metal protective shell.
The back of the speaker unit is connected to the earphone circuit by wire soldering.
Laser engraved “MD24 X212” MEMS microphone for dual microphone ENC call noise cancelling function.
The positive and negative electrodes of the earphone battery are connected to the earphone circuit through wires, and the position is fixed with high temperature-resistant insulating tape.
Take out the earphone battery, battery information, rated voltage 3.7V, rated capacity 45mAh/0.167Wh.
The FPC cable that integrates the internal circuit of the earphone head is connected to the earphone motherboard through the opening of the front cavity of the earphone, and the opening of the front cavity has a sponge for cushioning.
The place where the FPC cable and earphone mainboard are connected is coated with a lot of white glue to fix and seal.
Pry open the back of the headphone stem.
The back of the earphone handle is provided with a bluetooth antenna and a touch detection patch.
Take out the earphone motherboard.
The internal structure of the earphone handle, the bottom is the opening of the charging contact and the magnet for attracting the charging case.
A lot of glue is used to fix the headphone head FPC cable to the motherboard.
After removing the FPC cable of the headphone head, the front of the mainboard of the headphone handle.
The back of the headphone handle motherboard.
The MEMS microphone with laser engraving “iC161 2118” on the top of earphone’s motherboard is used to work with the back-feed microphone to provide dual-mic noise cancelling function for earphone.
ZIF connector for connecting earphone battery, speaker and back-feed microphone, model OK-128GF006/2-35.
WUQI WQ7033AR bluetooth audio SoC, WQ7033 series supports Bluetooth 5.2 dual-mode, supports the new generation of bluetooth audio technology standard LE Audio. Integrated high-performance dual RISC-V CPU, HiFi 5 DSP and NPU, ultra-low power consumption design provides earphones with 10 hours of long-lasting battery life.
In other functions, WQ7033AR supports FF+FB mixed ANC function and transparent mode. Support multi-Mic mixed noise cancelling, AI NN network smart call noise cancelling, can achieve high-definition call experience in complex environments. Support VAD voice wake-up. It also has rich interfaces, integrated charging management system, etc.
WUQI WQ7033A system and software architecture.
Two Scientific SDHC1608F4R7M magnetically shielded precision wire wound inductors, one of the SDHC1608 series. Low DCR, improve efficiency and prolong standby time, the top is high-density magnetic powder, which has higher permeability than traditional precision wound inductors. Both sides are also magnetic shielding structures to optimize spatial interference to surrounding devices.
The entire SDHC series has a very high cost performance, better magnetic shielding effect, and DCR is superior to traditional precision wire wound inductors.
According to 52audio, Scientific has responded to the three models and dozens of high-quality inductive products launched in the TWS earphone market. At present, OnePlus Buds Z2 true wireless earbuds, QCY T17 true wireless earbuds, LOOP-T6 smart earphones and other TWS earbuds have adopted Scientific Fully Magnetically Shielded Precision Wirewound Inductors.
The metal features for charging earphones, and the bottom is provided with a sealing ring, which is waterproof and dustproof.
The crystal oscillator that provides the clock for the bluetooth chip.
Pogo Pin connector for connecting the bluetooth antenna and touch detection patch.
Silkscreen “EA 4AJ” battery protection IC.
There are 2 LED lights on the mainboard of the earphone to indicate the working status of the earphones.
The microphone at the bottom of the motherboard, laser engraved “MD21”, is used to provide pickup function for voice calls.
After actual measurement, the size of Haylou X1 Pro earphones speaker is about 7.98mm.
All components of Haylou X1 Pro true wireless earphones.
In terms of appearance, the earbuds of Haylou X1 Pro use a classic handle-type in-ear design, and the back of the earphone handle is designed to resemble a piano key, bringing the rhythm of music to the user. The charging case adopts a design similar to a space capsule, which brings an interesting experience to users.
In terms of internal configuration of the charging case, the built-in battery capacity is 1.48Wh/400mAh, which provides an additional 34 hours of battery life for earphones. In terms of power management, LPS LP6261 ultra-low static current synchronous boost converter is used to boost the built-in battery in the charging case to charge earphones.
In terms of internal configuration, earphone uses 3 microphones to provide a clear experience of super noise cancelling for earphone’s call function. The earphones use two Scientic SDHC1608F4R7M fully magnetically shielded precision wire wound inductors to optimize the spatial interference to surrounding devices. The bluetooth audio SoC adopts WUQI WQ7033AR, which supports Bluetooth 5.2 dual-mode and the new generation of bluetooth audio technology standard LE Audio. Integrated high-performance dual RISC-V CPU, HiFi 5 DSP and NPU, ultra-low power consumption design provides earphones with 10 hours of long-lasting battery life.