UGREEN, a well-known digital accessory brand, has deployed the TWS true wireless earphones market and launched the HiTune series. Before 52audio had disassembled its first product UGREEN HiTune WS100 true wireless bluetooth earphones, which conforms to UGREEN’s consistent design principles of simplicity and ease of use.
Some time ago UGREEN launched its second true wireless bluetooth earphones——HiTune T1. This time the earphones adopts a new handle in-ear design. A single earphone has two microphones, and ENC environmental noise reduction technology has better calls. Noise reduction capability; IPX5’s waterproof rating can cope with sports and commuting usage scenarios. UGREEN HiTune T1 uses Airoha bluetooth 5.0 chip, which supports simultaneous transmission of both ears and stable connection; built-in 6mm composite diaphragm dynamic driver, with two sound effects of equalization mode and subwoofer mode, which can be switched by touch; a single battery life of the earphones is about 5 hours, With charging case music playing for about 24 hours. Let’s look at the detailed disassembly of this product.
| 1. UGREEN HiTune T1 charging case teardown
After unpacking the box, we have got a preliminary impression of the appearance design of UGREEN HiTune T1 true wireless bluetooth earphones. Both the earphones and the charging case are designed in gray and black. Below we will enter the dismantling link to take a look at its structural design and chip materials.
Pry open the charging cockpit, you can see the internal structure.
The charging case is the inner structure of the shell, and the buckle is coated with glue for reinforcement.
Charging port and shaft position.
Two PCBAs, one high and one low, are fixed with screws.
Remove the screw and take out the circuit, the charging cockpit shell is displayed. There are two circular magnets in the earphone sound cavity to magnetically fix the earphone.
There are also two bar magnets at the earphone handle to magnetically fix the earphone. The magnet that adsorbs the cover of the box is between the physical button and the indicator light guide column.
Charging case internal circuit. The PCBA where the charging interface is located and the battery are connected to the motherboard through wires.
The USB Type-C charging interface is welded through holes to ensure the stability of the charging cable. The wire solder joints are reinforced with glue.
On the other side of PCBA, two resistors are used for USB-C to get power.
Circuit on the motherboard side. The magnet position is hollowed out.
Circuit display on the other side of the motherboard. The wire solder joints are all reinforced with glue.
LPS LP7801T ultra-low power charging and boosting single chip, designed for charging/discharging small-capacity lithium batteries, integrates linear charging management module, low-power synchronous boost discharge management module, built-in power MOS, and externally programmable charging current. The maximum charging current is 1A, and the standby current of the whole earphone compartment <10uA (including earphones and protection board) when 5V is normally open.
LPS LP7801T adopts ESOP-8 package, built-in OVP, built-in NTC accurately adjustable, input withstand voltage 36V, no input over-voltage protection components, standby current 1uA; boost module efficiency up to 95%, high switch foot withstand voltage, Fixed 5.1V output, less peripherals and small ripple.
According to 52audio, audio products from brands such as Xiaomi, OPPO, Huawei, Lenovo, Motorola, Realme, Edifier, QCY, JLab, Skullcandy, Boltune and other brands have adopted LPS power management solutions.
A non-standard microcontroller is responsible for charging case functions such as indicator light control.
The charging case uses a soft pack battery, model M902030, with a rated voltage of 3.7V, a rated capacity of 500mAh, and an energy of 1.85Wh.
The battery protection board is composed of a lithium battery protection IC and 8205A N-MOS tube, which is responsible for the overcharge, overdischarge and overcurrent protection of the battery, and the thermistor detects the battery temperature.
The other side of the battery protection board is the positive and negative poles of the battery.
Two LED indicators.
Gold-plated Pogo Pin for charging earphones.
| 2. UGREEN HiTune T1 earphones teardown
Let’s continue to disassemble the earphone part of UGREEN HiTune T1. The earphones are designed with a handle-in-ear design, which is as gray and black as the charging case and has a good texture.
The earphone cavity has a large tilt angle and fits the auricle.
There is a microphone pickup hole on the top of the earphone handle, which is mainly used to collect ambient sound and assist in call noise reduction. There is a dust-proof net inside; below the opening is the Greenlink brand logo, and this area supports touch.
The indicator light opening at the bottom of the outside of the earphone handle.
The call microphone pickup hole at the bottom of the earphones handle.
The charging contacts and L/R logo on the inside of the earphone handle.
The earphone shell is processed by a variety of processes, from the outside to the inside, it is a gray cover plate, a black frosted shell, a shiny shell and a black frosted shell.
Remove the eartips, the pressure relief/tuning hole near the mouthpiece.
The metal dust-proof net at the mouthpiece prevents foreign objects from entering.
First disassemble the shell of the sound chamber, and place the battery and speaker unit in parallel.
Take out the battery and the speaker unit, there is a foam buffer under the battery.
Remove the gasket that protects the battery. Below is the magnet that attracts the charging cockpit.
The diaphragm of the speaker unit is protected by a metal cover.
The speaker unit size is 5.92mm, which is similar to the official 6mm.
The button battery used in the earphones comes from EVE, model ICB1154, with a diameter of 11mm, a thickness of 5.4mm, and a rated voltage of 3.7V. According to 52audio, there are already true wireless earphones of Samsung, Buttons, ZMI and other brands that use EVE button batteries.
Information on the other side of the battery, rated capacity 48mAh, energy 0.178Wh.
The hole where the wire is connected to the main board is small and sealed with glue.
Remove the outer cover of the earphones.
Inside the cover, the top is a touch-sensitive foil, and the middle of the earphone handle is a foil of the bluetooth antenna.
A protective cover for the microphone pickup hole on the top of the earphone handle.
Take out the strip-shaped main board, and the main board fits the contour of the shell.
Inside the earphone handle housing.
The circular magnet that attracts the charging cockpit.
The circuit on the side of the motherboard is displayed, and the peripheral components of the main control chip are simplified.
Circuit on the other side of the motherboard.
The main control chip of UGREEN HiTune T1 true wireless bluetooth earphones is Airoha AB1536, which supports bluetooth 5.0 and Airo’s MCSync connection method, which makes the connection more stable, reduces intermittent sound skipping, supports high-resolution audio stream, and low latency. Ear power consumption is more balanced. Airoha AB1536 provides excellent audio performance in most bluetooth audio earphones applications. A new generation of echo cancellation and noise reduction solutions improves the audio quality of voice calls on earphones products.
According to 52audio, bluetooth earphones on the market, including Sony, 1MORE, realme, FIIL, Edifier, Plantronics, Yiou and other brands, have adopted Airoha solutions.
Laser carving 561B0L MEMS silicon microphone.
VINTEK 233DR single-button touch IC, DFN-6 package, used to detect touch operation.
Connect the metal shrapnel to the touch area.
Integrated lithium battery protection IC with silk screen 0bD3.
The acceleration sensor of the silk screen MU8D is used to detect the tapping operation.
Connect the metal shrapnel of the bluetooth antenna.
Two LED indicators.
Laser carving 564 10Y MEMS silicon microphone.
There is a rubber ring at the bottom of the charging copper column, which can provide a certain degree of dust and water protection.
All components of UGREEN HiTune T1 true wireless bluetooth earphones.
UGREEN HiTune T1 wireless earbuds adopts a new naming method, which is easier to remember; the earphones adopts a handle-in-ear design, using dual-microphone beamforming technology combined with noise reduction algorithms, which can bring better noise reduction effects for calls.
In appearance, the UGREEN HiTune T1 earphones and charging case both use a gray-black matching design. In particular, the earphones housing uses a variety of processing techniques to enhance the quality. In terms of internal circuits, the charging case inputs power through the USB Type-C interface. LPS LP7801T supports input withstand voltage of 36V, eliminating the need for input over-voltage protection components, integrating linear charging management modules, low-power synchronous boost discharge management modules, and special Designed for charging/discharging small-capacity lithium batteries; a non-standard single-chip microcomputer is responsible for charging case functions such as indicator light control; charging case soft pack battery capacity 500mAh, providing extra battery life for the earphones.
The main control chip of the UGREEN HiTune T1 earphones is Airoha AB1536, which supports bluetooth 5.0, supports Airo’s MCSync binaural direct connection, adopts a new generation of echo cancellation and noise reduction solutions to improve the audio quality of voice calls on the earphones; the earphones supports tapping The interaction with long press is realized by VINTEK 233DR single-button touch IC and an acceleration sensor; the button battery used in the earphone comes from EVE with a capacity of 48mAh; the size of the speaker unit is 6mm, and the earphone has two sound effects, namely, equalization mode and subwoofer mode. Give users one more choice.