Noise-canceling headphones have become a necessity in people’s lives, isolating noisy voices during commutes, blocking keyboard noise in offices, and immersing in pure sound quality during solitary nights. Their application scenarios are becoming increasingly diverse. In the noise-canceling headphone market, Baseus occupies an important position thanks to its technological iterations and scenario-based designs.
Recently, I Love Audio Network conducted a detailed teardown of the 2025 Baseus Bowie M3s true wireless noise-canceling headphones, discovering that the internal mainboard of the charging case utilizes the INJOINIC IP5528 charging case SoC chip, which integrates rich functions such as MCU, boost converter, lithium battery charging management, and battery level indication, providing a complete charging and discharging solution for the headphone charging case.
The Baseus Bowie M3s true wireless noise-canceling headphones feature a minimalist and stylish design, with a high-quality feel and comfortable wear. The charging case adopts a rounded square design, with a white lacquered surface, equipped with a charging indicator light and a Type-C interface. The headphones feature a stem-style in-ear design, with a protruding circular touch area on top, ensuring comfort during long wear without causing ear pain, and microphones are located on the side and bottom of the stem.
In terms of functional configuration, the Baseus Bowie M3s true wireless noise-canceling headphones have several highlights. In noise cancellation, they are equipped with ANC 3.0 adaptive noise cancellation technology, supporting 6-microphone AI call noise cancellation, with five levels of adaptive, indoor, outdoor, commuting, and custom noise cancellation adjustments.
Regarding sound quality, they have Hi-Res AUDIO WIRELESS and QQ Music premium sound quality dual certification, supporting LDAC high-definition decoding, paired with a 10mm super-sensitive strong magnetic driver, capable of transmitting lossless sound quality at 990kbps. For connectivity and battery life, they utilize Bluetooth 6.0, with a single-use battery life of 12 hours and a total battery life of 55 hours.
Through the teardown, it was found that the Baseus Bowie M3s true wireless noise-canceling headphones’ charging case houses a 600mAh lithium-ion battery, with hardware such as power inductors, over-voltage and over-current protection ICs, and connectors on the mainboard, along with the INJOINIC IP5528 SoC chip, providing a complete power solution for the headphone charging case.
The INJOINIC IP5528 TWS headphone charging case management SoC is a multifunctional power management SoC that integrates MCU, boost converter, lithium battery charging management, and battery level indication, providing a complete solution for TWS charging cases. Thanks to the high integration and rich features of the IP5528, only a minimal number of peripheral components are required during application, effectively reducing the overall solution size and lowering BOM costs.
The INJOINIC IP5528 supports follow-up charging functionality, allowing for fine-tuned adjustments of charging voltage in the range of 3.2~5.5V with 10mV steps, effectively improving the conversion efficiency from the charging case battery to the headphone battery by 15%~20%, thereby enhancing the overall battery life of TWS headphones by 15%~20%. Based on this feature, brand manufacturers can make more flexible trade-offs in battery capacity, appearance size, and functionality.
For example, without increasing battery capacity, the product can provide longer battery life; or a smaller capacity battery can be used to achieve the same battery life as before, which not only effectively reduces costs but also minimizes product size, enhancing portability; or it can ensure that the product’s battery life remains uncompromised while incorporating more features and applications, alleviating user concerns.
The INJOINIC IP5528 only requires one inductor to achieve boost and buck functions, supporting low-cost inductors and capacitors. The synchronous boost system of the IP5528 provides a rated output current of 400mA, with conversion efficiency as high as 93%. In light load conditions, it automatically enters sleep mode, reducing static current to 15µA.
The INJOINIC IP5528 employs switch charging technology, providing a rated charging current of 1A, with charging efficiency as high as 90%. It features built-in chip temperature protection and intelligent adjustment of charging current based on input voltage. The IP5528 includes a 12-bit ADC for precise measurement of battery voltage and current. It supports 1/2/3/4 LED battery level displays and digital battery level displays. According to the product manual, the IP5528 also supports output voltages of 3.2V~5.2V, enabling fast charging for headphones.
According to the teardown by I Love Audio Network, brands such as JBL, Motorola, Baseus, QCY, Shuiyueyu, Marshall, Lenovo, Soundcore, Bull, Philips, TOZO, sanag, iKF, Nothing, Shanshui, Soaiy, Jielitang, Elephant, boAt, Lanwanke, Coca-Cola, Honor, realme, Transsion, Edifier, 1MORE, Heylo, Miniso, Kugou, Skyworth, Sound Intelligence, Yunshi, ChargeK, Haier Brothers, Monster, Noby, Liweilang, Yingshu, Qiaowei, AnkerWork, Natuo, Skullcandy, MOZOTER, HYUNDAI, Walmart, ROBOT, Urbanfun, Btootos, kaiboaudio, and Loca, as well as many other brands, have adopted INJOINIC’s power management solutions.
I Love Audio Network summarizes that the Baseus Bowie M3s true wireless noise-canceling headphones offer impressive noise cancellation and battery life, with a noise cancellation depth of -50dB and intelligent adjustment of noise cancellation effects, providing a total battery life of up to 55 hours when paired with the charging case. The INJOINIC IP5528 charging case management SoC housed within the charging case achieves a charging efficiency of up to 90%, delivering an efficient charging experience for the headphones.
INJOINIC, officially known as Shenzhen INJOINIC Technology Co., Ltd., was established in 2014 and is a company focused on the design of high-performance, high-quality mixed-signal chips, primarily engaged in the research and sales of power management chips and fast charging protocol chips. INJOINIC continues to launch cost-effective smart mixed-signal chips, with its power management chips and fast charging protocol chips widely used in products such as mobile power supplies, fast charging power adapters, wireless chargers, car chargers, and TWS headphone charging cases.
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