OPPO Enco Air 3 is equipped with the 13.4mm dynamic driver made of polymer composite materials and high-quality digital signal processor (DSP), which can present rich and delicate music details and achieve more accurate music performance. Support OPPO Alive Audio spatial sound algorithm to achieve stereo surround effect. There are three tunings selected by masters to meet different user preferences. Supports DNN call noise reduction, low-latency game mode, custom pop-up theme, dual-device connection, 25-hour battery life, etc.

We have also teardown before: OPPO Enco Air2 Pro, OPPO Enco Free 2, OPPO ENCO X2, OPPO Enco X, OPPO Enco R, OPPO ENCO Air 2i, OPPO Enco Air 2, OPPO Watch SE, OPPO Watch, OPPO Band 2, etc. . Let’s take a look at the detailed teardown report of this product.

01/ OPPO Enco Air3 charging case teardown

Pry open the snap-on fixed shell, and remove the structure of the charging cockpit.

The upper structure of the charging cockpit, the main board is fixed by screws, and the battery is fixed on the main board.

The bottom structure of the charging cockpit.

Remove the battery, and there is a rubber pad underneath to isolate it from the motherboard.

Remove the screws and take out the motherboard unit.

The circuit on the main board side of the charging case, and the main components are protected by transparent glue.

The circuit on the other side of the charging case motherboard.

The LED indicator group is wrapped in black foam to prevent light leakage.

SinhMicro SS881E POWER MCU adopts SSOP24 package and integrates battery charging management and single-chip microcomputer to realize functions such as power management and charging case control.

SS881X is SinhMicro’s AD-type Flash MCU series integrated with charge and discharge management. It has built-in rich interface functions, flexible configuration modes and different low power consumption options. This product is mainly used in portable intelligent electronic devices that require charging and intelligent control, bringing simplified peripheral costs, excellent performance and flexible and convenient development.

The Hall element of the silk screen AG 2C is used to sense the magnetic field change when the charging case is turned on/off, and then notify the charging case MCU and the earphone to pair or disconnect the connected device.

ETA ETA1061 1A synchronous boost converter with 1μA quiescent current, used to boost the built-in battery of the charging case to charge the earphone.

ETA1061 adopts SOT23-6 small package, integrated 5V high efficiency, synchronous boost converter; 5V boost normally open, power consumption as low as 1.7uA, can support 0.4A maximum boost output, support low battery voltage boost output, can The charging time of the earphone is longer, and the 5V output can be switched by controlling the ENBST pin; the built-in switching frequency of 1.4MHz can use a small-sized 2.2uH inductor.

A boost inductor that works with a boost IC to charge the earbuds.

Screen printing 2eCBJ’s integrated battery protection chip.

The charging case is the Pogo pin connector for charging earbuds.

Screen printing 24AF TVS.

Silkscreen 905 HQ IC.

Information on the external label of the charging case battery, rechargeable lithium-ion battery model: 631728A, rated voltage: 3.7V, rated capacity: 300mAh 1.14Wh, charging limit voltage: 4.35V.

Tear off the outer label, and there is a QR code printed on the cell. The parameter information is consistent with the external label information.

02/ OPPO Enco Air3 earbuds teardown

teardown earphone part, remove the back cover of the headset stem.

The Bluetooth antenna and touch detection patch are set on the inner side of the cover, and the exposed copper is connected to the main board.

Headset stem internal motherboard unit structure.

Solder the charging contacts and lift the motherboard. There are cables on the motherboard connected to the components inside the earbud head.

The internal structure of the headset stem is equipped with connectors, magnets and microphones connected to the motherboard to charge the earbuds at the end.

The circuit on one side of the headphone motherboard.

The circuit on the other side of the headphone motherboard.

The MEMS microphone of the laser carving R2CP 08DK, used for voice pickup, comes from RAYKING.

The metal dome connector that connects the Bluetooth antenna and the touch detection sensor.

The earbuds is equipped with WUQI WQ7033MX Bluetooth audio SoC. Through the built-in Wuqi spatial audio algorithm, it supports spatial sound effects and can create a very spatial listening experience. The 13.4mm dynamic driver design adopts WUQI’s leading low power consumption and HiFi 5 DSP+RISC-V architecture design, which not only improves the sound quality of the earphones, but also has a longer battery life experience. The 27mA battery can achieve a single battery life of up to 6 hours. WUQI WQ7033MX Bluetooth audio SoC supports Bluetooth 5.3, self-developed W-TWS+ connection technology, and has formed an overall software and hardware solution covering the bottom layer in terms of low-latency guarantee, which can bring stable connection and ultra-low latency to the earbuds. Support multi-point connection to meet the listening experience of more scenes.

Scientic SDHL fully magnetically shielded precision wire-wound inductors are used to power the internal circuits of the Bluetooth chip. The SDHL series adopts 0603 (inch size) SMD package, with optional inductance of 1μH to 22μH standard gear. Small size and high current, suitable for TWS bluetooth headsets, IOT devices, smart watches, bracelets, communication modules, facial recognition modules and other applications.

The crystal oscillator of Radium Engraving R16.0 AdV1 provides the clock for the bluetooth chip.

Silkscreen 23B 09 lithium battery protection IC.

Open the earphone head cavity along the parting line.

The internal structure of the rear cavity is equipped with a bass enhancement cavity structure, and the cross-sectional area of the bass tube is increased by 100%, which effectively improves the bass quality.

Open the cover, and the earphone battery is underneath.

The earphone uses a soft pack button battery, model: GF 105530A, voltage: 3.85V, capacity: 0.103Wh, from Xinyu Ganfeng.

The earbud built-in the dynamic driver, and a polymer composite diaphragm is used to make the high frequency more delicate and stretch, and the mid frequency more full. N48 powerful neodymium magnets, the total length of the copper-aluminum coil is 1.9 meters, to achieve dynamic performance with higher sensitivity.

On the back of the dynamic driver, there are tuning holes around it, which are protected by a fine dust-proof net.

After actual measurement, the size of the dynamic driver is about 13.31mm.

All components of OPPO Enco Air3 true wireless earphones.

03/ Summary

The overall weight of OPPO Enco Air 3 is only 37.4g, and the weight of a single earbud is 3.7g. In terms of internal structure configuration, the charging case battery is 300mAh, and the Type-C interface is used to input power on the motherboard. The SinhMicro SS881E POWER MCU, which integrates battery charging management and single-chip microcomputer, is responsible for power management and charging case control functions. The ETA ETA1061 1A synchronous boost converter with 1μA quiescent current is used to boost the built-in battery of the charging case to charge the earbuds.

The internal main control of the earbuds is WUQi WQ7033MX Bluetooth audio SoC, which is designed with low power consumption and RISC-V chip architecture, so that earbuds have a longer battery life. Built-in HiFi 5 DSP enthusiast-level computing brings a wider sound field experience and clearer music details. Built-in self-developed spatial audio algorithm creates a more spatial listening experience. It also provides support for rich features such as headset dual-device connection and low-latency game mode.

PS: Translated from 52audio

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