Recently, I shared with you a detailed review of the QCY T20. In appearance, the small and mini shape and the semi-in-ear design provide a light and comfortable wearing experience. In terms of configuration, it is equipped with a 13mm LCP composite titanium-plated diaphragm dynamic driver, which supports a new generation of Bluetooth 5.3 and 4-mic+ENC high-definition call noise cancellation, and provides 20 hours of comprehensive battery life.
The products we have teardown QCY before include: QCY T11, QCY T10, QCY T18 MeloBuds, QCY T17, QCY T13, QCY T1C, QCY T1 Lite, QCY T1S, QCY T4 TWS, QCY T5, QCY T5S and QCY T6 etc. Let’s take a look at the detailed disassembly report of this product below.
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$16 – QCY T20 Review
01/ QCY T20 AilyPods charging case teardown
Pry off the charging case cover and take out the inner cockpit.
The charging interface and indicator light structure inside the charging case cover.
The motherboard unit is fixed by screws at the bottom of the cockpit.
A battery is set inside the cockpit, protected by a sponge pad.
Remove the screws and take out the motherboard, and the battery wires are soldered to the motherboard.
Take out the battery unit, and the whole thing is wrapped in a sponge pad to improve safety.
The bottom structure of the cockpit is equipped with three magnets for adsorbing the charging case cover and earbuds.
Remove the battery sponge pad and the silkscreen information on the built-in battery in the charging case. Model: VDL501233PN2, voltage: 3.7V, capacity: 220mAh/0.814Wh, from VDL.
The circuit on one side of the charging case motherboard.
The circuit on the other side of the charging case motherboard.
TPS SY8812 is a SoC chip specially designed for bluetooth headset charging compartment, using 3mmx3mm QFN16 package. The chip integrates a charging module and a discharging module. The charging current can be adjusted externally. The discharge module integrates two output current limit switches, provides independent load presence detection and load insertion detection, and supports output current detection. The chip integrates NTC protection function to charge and discharge the battery more safely.
TPS SY8812 optimizes the performance of product application design reliability, the input withstand voltage is up to DC30V, and the chip has passed the IEC62368 safety certification. SY8812 is very suitable for the design of the bluetooth headset charging box, which greatly simplifies the peripheral circuits and components, and provides an easy-to-use solution for the application of the bluetooth headset charging box.
According to 52audio, the TPS power management chip has been adopted by Baseus, Xiaomi, OPPO, OnePlus, realme, 1MORE, Baidu, Edifier, JBL, Harman, Lenovo and other brands.
2R2 power inductor, cooperate with power management chip to boost and boost the built-in battery to charge earphone.
XySemi XB5332B lithium battery integrated protection chip, integrated power MOSFET, high-precision voltage detection circuit and delay circuit. The XB5332B is housed in an ultra-small SOT23-5 package with only one external component making it an ideal solution for limited space in battery packs.
The XB5332B has all the protection functions required in battery applications, including overcharge, overdischarge, overcurrent and load short circuit protection. Accurate overcharge detection voltage ensures safe and full utilization of charging. Low static power consumption.
According to 52audio, TWS earbuds of Xiaomi, Redmi, MONSTER, Motorola, Anker, VANKYO, SONG, Honor, Edifier, QCY and many other brands have adopted the XySemi lithium battery protection solution.
There are two Pogo Pin connectors on the motherboard for charging the earphones, with a sealing rubber ring attached to the edge.
02/ QCY T20 AilyPods earbuds teardown
Go to the earbuds teardown section. Pry open the cavity along the parting line, and the front and rear cavities are covered with sponge pads for protection.
Tear off the foam pad, front cavity internal speaker.
Take out the speaker, and the inside of the cavity is protected by a fine dust-proof net to prevent foreign objects from entering the cavity.
The front diaphragm of the speaker unit.
On the back of the speaker unit, there are several bar-shaped tuning holes around it.
After actual measurement, the speaker size is about 13mm.
Tear off the sponge pad in the rear cavity, and a soft-pack button battery is installed inside.
Take out the battery, a bracket is arranged inside the rear cavity to isolate the battery and the main board.
Take out the bottom of the back cavity of the bracket, and solder the speaker and battery wires on the motherboard.
The battery label has the parameter information of the product, model: 1040, voltage: 3.8V, capacity: 35mAh/0.133Wh.
A QR code is silk-screened on the back of the battery for product traceability.
Remove the end plug of the earphone handle and pull out the main board, which is covered with a shielding sticker; the end-of-call pickup microphone is provided with a rubber cover to seal to improve the radio performance.
The circuit on the motherboard side.
The circuit on the other side of the motherboard.
JL AD6973D bluetooth audio SoC, supports Bluetooth 5.3, built-in 32-bit DSP, supports AAC, SBC decoding. Support neural network noise suppression and echo cancellation, support multi-band equalizer. Support single/dual microphone noise cancellation, support two analog microphone amplification, built-in microphone bias. It is packaged in QFN20-3*3.
According to 52audio, the bluetooth audio products of QCY, Tezo, Philips, Motorola, Amazon, boAt, Lenovo, Xiaomi, Baseus, MEES and other brands have adopted the JL bluetooth audio solution.
24.000MHZ crystal oscillator, provides clock for bluetooth chip.
The peripheral power inductor of the main control chip is the Scientific SDHC1608F4R7M magnetic shielding precision wire wound inductor, which is one of the SDHC1608 series. It has the advantages of low DCR, improved efficiency and extended 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.
According to 52audio, Scientific responds to three models and dozens of high-quality inductor products launched in the TWS earbuds market. At present, TWS earbuds under QCY, HAYLOU, OnePlus, Soundcore, MONSTER and other brands have adopted Scientific full magnetic shielding precision wire wound inductors.
Lithium battery protection IC with silkscreen 0n 0j.
The MEMS microphone of Raiden i2301 2216 is used for pickup of voice calls.
The noise cancellation microphone for calls is also fixed with an acoustic sealing structure. The two microphones cooperate with the noise cancellation algorithm of the main control chip to achieve a clear voice call effect.
Laser carving iA131 2223’s MEMS call noise cancellation microphone.
Two metal copper post connectors for charging earbuds.
Metal connector for touch control.
Bluetooth antenna for wireless signal transmission.
QCY T20 AilyPods true wireless bluetooth earbuds all components.
03/ Summary
QCY T20 AilyPods adopts a simple and stylish design in appearance. The oval-shaped charging case is compact and lightweight, with a skin-like coating, which is delicate to the touch and comfortable to hold. The earbud curve is similar to “AirPods 3”, with piano paint process, smooth and round texture, 4.0g body with semi-in-ear design, light and comfortable to wear.
The internal structure configuration is relatively simple. The charging case has a built-in VDL 220mAh lithium battery and uses Type-C input power. The TPS SY8812 charging bin SoC single chip is responsible for the battery charge and discharge management, the input withstand voltage is up to 30V, and the NTC battery temperature protection function is integrated. The XySemi XB5332B lithium battery integrated protection chip is responsible for the overcharge, overdischarge, overcurrent and load short circuit protection functions of the battery.
The earbuds use a 13mm dynamic driver and a 35mAh soft pack button test battery, which are respectively connected to the motherboard through wires. On the main board, the main control chip adopts JL AD6973D bluetooth audio SoC, supports Bluetooth 5.3 and single/dual microphone noise cancellation, and is matched with two MEMS microphones to pick up sound to achieve clear call effect. A scientific magnetic shielding precision winding inductor is arranged on the periphery of the main control to supply power to the internal circuit of the bluetooth chip.
Source: 52audio
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