Soundcore is an audio brand under Anker Innovations. Its products cover TWS headphones, over-ear headphones, noise-canceling headphones, and portable Bluetooth speakers. The Soundcore Sport X20 true wireless noise-canceling headphones are a product focused on sports. The appearance design incorporates a soft, skin-friendly, and flexible ear-hook structure, providing a comfortable and stable wearing experience and not easily falling off during sports. Sport X20 also supports IP68 dustproof and waterproof ratings, protecting it from damage caused by outdoor rain, sports sweat, and dust.

Recently, 52audio disassembled the Soundcore Sport X20 true wireless noise-canceling headphones and found its Injoinic IP5518 TWS headphone charging case management SoC. IP5518 is a multifunctional power management SoC that integrates an MCU, a 5V boost converter, lithium battery charging management, and battery power indication.

In terms of configuration, the Soundcore Sport X20 is equipped with an 11mm dynamic driver unit and supports Bass Up bass enhancement technology. The surging sound quality provides stronger power for sports. It can also create a unique personalized listening experience through the Soundcore APP. It supports an adaptive active noise cancellation function, providing deep and extensive noise cancellation, and can adaptively adjust the noise cancellation mode according to the environmental noise to ensure comfortable wearing.

The Soundcore Sport X20 true wireless noise-canceling headphones support AI call noise cancellation function. Based on a 6-microphone system and combined with AI noise cancellation algorithm, it provides clear calls. In terms of interaction, physical buttons are used to provide precise control and avoid accidental touches during sports. In terms of battery life, the single battery life is up to 12 hours (7 hours in ANC mode), and the comprehensive battery life with the charging case is 48 hours.

After detailed disassembly by 52audio, it is found that the Soundcore Sport X20 headphones have built-in key components such as a 60mAh pouch battery, an 11mm speaker, a MEMS microphone, a Bluetooth audio SoC, and a lithium battery protection IC. The charging case of the headphones is built with a 580mAh lithium-ion battery, a lithium battery protection IC, an FCP cable, and other components. The main board is mainly integrated with components such as a charging case management SoC, a Type-C charging female socket, an overvoltage and overcurrent protection IC, and a Hall effect sensor switch. Among them, the charging case management SoC is from Injoinic IP5518, a multifunctional power management SoC with an integrated MCU.

The Injoinic IP5518 TWS headphone charging case management SoC is a multifunctional power management SoC that integrates an MCU, a 5V boost converter, lithium battery charging management, and battery power indication, providing a complete power solution for TWS Bluetooth headphone charging cases. The high integration and rich functions of IP5518 enable it to require only a few peripheral devices in the application, effectively reducing the size of the overall solution and reducing the BOM cost.

The Injoinic IP5518 is very suitable for the application of smart two-way communication bins with gradually increasing demand. It can provide the function of instantly connecting headphones to the mobile phone when the cover is opened. Compared with ordinary products, the reconnection time experience of more than 7 seconds is greatly improved. At the same time, both the headphones leaving and entering the bin can be reminded by light display, giving users intuitive feedback.

The Injoinic IP5518 chip has a built-in 5V output, synchronous rectification boost DC-DC, with the power transistor built-in, providing a maximum output current of 300mA, and the boost efficiency is as high as 93%. The switching frequency of the DC-DC converter is 1.5MHz, which can support low-cost inductors and capacitors. The linear charging of IP5518 provides a maximum charging current of 500mA, and the maximum charging current can be flexibly configured. It has the function of intelligently adjusting charging currents by built-in IC temperature and input voltage.

The Injoinic IP5518 can realize independent warehousing detection of TWS earbuds. After detecting that the earbuds are put into the warehouse, the earphone charging mode is automatically entered. After the earphones are fully charged, they automatically enter the sleep state. The static current can be reduced to as low as 20uA. The fully charged judgment saturation current of the earphones can be flexibly customized, and the detection accuracy of the full charging current is as high as 1 mA. IP5518 has a built-in MCU, which can flexibly customize 4/3/2/1 LED or 188 digital tube power display. Built-in 12-bit ADC can accurately calculate battery power.

According to the disassembly by 52audio, it is understood that currently, the charging cases of TWS headphones of a large number of brands such as Baseus, Honor, realme, Lenovo, Transsion, Edifier, 1MORE, HeyLoo, Soundcore, BULL, MINISO, Kugou, Skyworth, SOAIY, SANSUI, MOONDROP, SoundAI, Yunshi, Chongke, Haier Brothers, Monster, Nobixing, Liweilang, Yingjuren, JOWAY, AnkerWork, NEXTOOL, JOYROOM, Nothing, sanag, Skullcandy, MOZOTER, HYUNDAI, onn. Walmart, ROBOT, Urbanfun, Btootos, kaiboaudio, Loca, ZTE, JLab, QCY, Hiby, Netease Cloud Music, Ximalaya, Pioneer, Monster, PIHEN, Aukey, MPOW, BoAt, Nokia, Ambie, etc. have adopted INJOINIC's power management solution.

Summary by 52audio

The Soundcore Sport X20 is a true wireless noise-canceling headphone focused on sports. With a single battery life of 12 hours and a comprehensive battery life of up to 48 hours with the charging case. The built-in 580mAh lithium-ion battery and Injoinic IP5518 charging case management SoC are the main reasons for its extremely long battery life. INJOINIC IP5518 can not only provide a complete power solution for Bluetooth headphone charging cases but also reduce the peripheral devices of the chip, effectively reducing the size of the overall solution and reducing the BOM cost.

Shenzhen INJOINIC Technology Co, Ltd. was established on November 20, 2014. It is a company focusing on the design of high-performance and high-quality digital-analog hybrid chips. Its main business is the research and development and sales of power management chips and fast-charging protocol chips. INJOINIC continuously introduces cost-effective intelligent digital-analog hybrid chips. The power management chips and fast charging protocol chips it provides are widely used in products such as power banks, fast charging power adapters, wireless chargers, car chargers, and TWS headphone charging cases.