ThinkPlus is a smart ecological strategy launched on the occasion of the 25th anniversary of Lenovo’s ThinkPad brand, which is mainly based on PCs to enrich ThinkPad peripheral products. In the personal audio market, thinkplus has launched a series of products such as tws earbuds, neck-mounted headphones, bone conduction headphones, bluetooth speakers, etc., with a wide range of products and very favorable prices.
Lenovo ThinkPlus Livepods LP40 (Lenovo LP40) true wireless earphones is a product that focuses on lightness and comfort. The charging case is small and round in appearance, and the earphone adopts a shallow eartips design, which cooperates with the appearance of the human ear to provide a comfortable wearing effect. In terms of functional configuration, it is equipped with a composite dual-band dynamic driver, 5.1 bluetooth chip, dual-channel transmission, supports AAC audio decoding, low game latency, and has a 20-hour battery life.
Previously, 52audio had disassembled Lenovo QT83 bluetooth earphones , Lenovo TC03 true wireless bluetooth earphones, Lenovo ThinkPlus TrackPods, Lenovo S1 TWS true wireless earphones, Motorola Verve Ones+, Motorola Verve Buds 200, Motorola Verve Buds 500, Motorola Verve Buds 800 true wireless earbuds Wait. Let’s take a look at the dismantling report of this product.
|1. Lenovo ThinkPlus Livepods LP40 charging case teardown
We learned about the appearance design of this product by unpacking, let’s enter the disassembly part to see the internal structure configuration information.
Pry open the shell and take out the charging cockpit.
One side structure of the charging cockpit.
There are heavy metal blocks on the sides of the cockpit.
On the other side of the cockpit structure, two baffles are provided to protect the internal battery and fix the main board.
The main board at the bottom of the cockpit is fixed by screws and positioning posts.
Remove the screws and take off the main components in the charging case.
The two circular magnets at the bottom of the cockpit are used to attract the earphones, and the two bar magnets on the edge are used to attract the charging case cover.
The circuit on the side of the main component in the charging case.
The other side of the circuit.
A lithium-ion soft pack battery is used in the charging case, model: FD701230, rated voltage: 3.7V, rated capacity: 250mAh, and date of delivery: September 2021.
The battery is equipped with a circuit protection board, and the protection board is equipped with a lithium battery protection IC and a MOS tube.
The circuit on the front of the motherboard.
The circuit on the back of the motherboard.
Type-C charging interface female socket.
Injoinic IP5413 is a multifunctional power management SOC that integrates 5V boost converter, lithium battery charging management, and battery level indicator. It provides a complete power solution for the TWS bluetooth headset charging compartment.
The linear charging of IP5413 provides a maximum charging current of 400mA, and the maximum charging current can be flexibly configured. The built-in IC temperature and input voltage intelligently adjust the charging current function. IP5413 can use PCB copper foil winding to generate inductance to replace traditional chip inductors to reduce costs.
According to 52audio, TWS headset charging cases of Edifier, JLab, HiBy, Baseus, Pioneer, PIHEN, BULL, AUKEY, MPOW, BoAt, Nokia, Lenovo and many other brands have adopted Injoinic power management solutions.
The boost inductor of the silk screen 2R2 is matched with the British core IP5413 power management SOC boost to charge the earphones.
The input overvoltage protection IC of silk screen 12331.
The charging case is the metal shrapnel used to charge the headset.
|2. Lenovo ThinkPlus Livepods LP40 earphones teardown
Enter the disassembly part of the earphone and pry open the cavity along the parting line.
The internal structure of the front cavity, the speaker is fixed by glue.
The internal structure of the back cavity, where the battery cells are placed.
Take out the speakers.
Strong internal structure, covered with dust-proof net inside the tuning hole.
The front of the speaker.
After actual measurement, the speaker size is about 12.34mm.
Take out the battery and the internal structure of the cavity.
A magnet is fixed on the cavity wall for adsorption of the charging case cockpit.
The headset uses a soft pack battery, model JYZ401010, rated voltage: 3.7V, capacity: 30mAh/0.111Wh, from Jin YuZhou Energy Co., Ltd..
Take out the main board unit.
A conductive cloth is fixed on the wall of the back cavity of the earphone for touch control.
Remove the metal tail plug that charges the headset.
The circuit on the front of the motherboard.
The circuit on the back of the motherboard.
JL AD6973D4 bluetooth audio SoC, support bluetooth 5.3, built-in 32-bit DSP, support AAC, SBC decoding, support neural network noise suppression and echo cancellation, support multi-band equalizer. Support single/dual microphone noise reduction, support two-way analog microphone amplification, built-in microphone bias. Adopt QFN20-3*3 package.
According to 52audio, the bluetooth audio products of F&D, Tezo, Philips, Motorola, Amazon, boAt, Lenovo, MAOKING, Xiaomi, Baseus, MEES and other brands have adopted the JL solution. JL also released the AC700N series of TWS solutions this year.
The 24.000MHZ crystal oscillator provides the clock for the bluetooth chip.
The ceramic bluetooth antenna on the motherboard is used for bluetooth signal transmission.
The MEMS microphone of LaserDiao MD21 R121 is used for voice call pickup.
All components of Lenovo thinkplus Livepods LP40 true wireless earbuds.
|3. Summary
Lenovo thinkplus Livepods LP40 true wireless earphones have a rounded square design in the charging case, bright surface processing, compact and lightweight, and a smooth and round body. The handle-shaped shallow in-ear headphones weigh only 3.6g, and the shallow in-ear eartips design not only guarantees the comfort of wearing, but also improves a certain degree of airtightness, making the audio effect better.
In terms of internal circuit, the charging case uses Type-C interface input power, built-in 250mAh lithium ion soft pack battery, equipped with circuit protection board and lithium battery protection IC, the built-in battery is charged by INJOINIC IP5413 power management SOC, and the maximum charging current can be flexibly configured , And provide functions such as lithium battery charge management, power indicator, and boost for headset charging.
The Lenovo LP40 headset uses a 12.34mm large dynamic driver and a JYZ30mAh soft pack battery, which are connected to the motherboard through wires. The motherboard uses JL AD6973D4 bluetooth audio SoC, which can support bluetooth 5.3, built-in 32-bit DSP, supports AAC decoding, and supports neural network noise suppression and echo cancellation. Built-in single MEMS microphone for voice call pickup.
Source: 52audio
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