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TWS Earphone

Overview of TWS Headphones

TWS is the abbreviation of True Wireless Stereo, which means true wireless stereo. TWS technology is also based on the development of Bluetooth chip technology. To trace its development history, we have to start with Apple. After the iPhone 7 cancelled the 3.5mm jack in 2017, the Bluetooth headset market developed rapidly. Until Apple took the lead in releasing the world’s first TWS Bluetooth headset AirPods, Bluetooth headsets have been rejuvenated since then.

Composition of TWS Headphones

Composition of TWS Bluetooth headsets: charging box and earbuds. The battery specification of the charging box is 450-750mah, and the battery specification of the single earbud is 50-55mah.

The earbuds are mainly composed of Bluetooth chips, Gsensor, in-ear detection, lithium battery management chips and 50-55mah batteries.

The charging box is mainly composed of charging management IC, MCU and 450-750mah batteries. The charging port generally adds TVS and OVP protection.

TWS headset over-current protection – Jeff Micro material recommendation

Load switch GLF (Jeff Micro) for TWS products:

GLF73910 Lithium battery protection WLCSP-4L 0.8uA is smaller than a 0603 resistor

GLF76321 Deep Sleep 0.97*1.47* WLCSP-6L, does not take up space, ultra-low R (dson): 31mΩ

TWS headset – Canrui material recommendation

Currently, the TWS headset market charging box has the function of turning on the screen display. Our company mainly promotes the following models of OCS (Canrui) brand Hall sensors:

OCH4002 Features: Unipolar Hall Price advantage (main product)

OCH1608 Features: Omnipolar Hall The lowest power consumption in the industry (0.8uA)

OCH166A Features: Omnipolar Hall Smaller package (DFN1216, etc.)

OCH1661 Features: Omnipolar Hall Packaging (plug-ins, etc.).

The reference case is shown in the side view below:

The Motorola Verve Buds 200 true wireless Bluetooth headset uses 1608 80AG Hall element to detect lid opening and closing.

TWS headset application solution – Prisemi material recommendation

Prisemi mainly promotes the PB15305 charging chip in the TWS headset charging box. Advantages: 2A charging, three independent outputs, independent detection. In the TWS headset electrostatic protection, surge protection, and OVP overvoltage protection application solutions, corresponding targeted products are developed for effective protection, as shown in the following table:

TWS earphones-harvatek material recommendation

TWS earphones – PIONEER agent line material recommendation

Our agent line also has other products suitable for TWS earphone applications, such as: boost chips, crystal oscillators, sensors and other devices, as shown in the following table. Main recommendation: ROHM’s micro distance sensor, now used in Huawei mobile phones, has the advantages of small size, simple design, and price advantage. Sensor model: RPR-0521RS