Smart speakers are a new type of product upgraded from traditional speakers. They are composed of electronic components such as sensors, IC chips, lithium batteries, and peripheral accessories. In addition to the basic music playback function, they also integrate network functions such as checking the weather, voice control, and retrieving travel and entertainment information, with voice recognition being the most core technological highlight.
Working Principle of Smart Speakers
The normal operation of a smart speaker relies on the coordinated work of various circuit modules. Its core modules and functional divisions are as follows:
[Image: Working Principle of a Smart Speaker]
Necessity of ESD Protection for Microphones and Speakers
Microphones and speakers are the key carriers for the “input-output” acoustic interaction of a smart speaker: the microphone is responsible for converting external voice signals into electrical signals, providing the data basis for voice recognition; the speaker, in turn, converts the processed electrical signals back into sound signals to achieve functions like music playback and command feedback.
Both share the commonality of “direct contact with the external environment”—the microphone needs to collect sound through its sound pickup hole, and the speaker needs to transmit audio through its sound outlet. This installation characteristic makes them high-risk components for electrostatic attacks: static electricity from human contact with the speaker’s surface or static electricity suspended in the environment can potentially invade the internal circuit through these openings. Once subjected to electrostatic interference, the consequences can range from mild, such as distorted microphone reception or noisy speaker sound quality, to severe, like directly burning out internal components and causing permanent failure of the parts. Therefore, it is crucial to equip microphones and speakers with reliable ESD protection measures.
ESD Protection Solutions for Microphones and Speakers
Considering the differences in working parameters and ESD protection requirements between microphones and speakers, JY Electronics has matched suitable protection chips for each:
Microphone: With a working output voltage of 5V and a current of 0.5A, its signal transmission is relatively sensitive to interference and requires a balance between protection performance and signal stability. Therefore, JY Electronics’ TT0501SA is selected as the protection device.
Speaker: With a rated power of 60W and a higher working voltage, it places stricter requirements on the voltage tolerance of the protection device. Therefore, JY Electronics’ TS1211PB is selected as the protection device.
[Image: ESD Protection Circuit for Microphone]
[Image: ESD Protection Circuit for Speaker]
The following table shows a summary of the parameters for the ESD protection chips:
[Table: Summary of ESD Protection Chip Parameters]
Similar to buttons, microphones and speakers, as core functional components of a smart speaker, their ESD protection effectiveness directly affects the user experience and service life of the device. Accurately selecting protection devices based on the working parameters and usage scenarios of different components is key to resisting electrostatic threats.From the perspective of industry development trends, the interface functions of future smart speakers will evolve towards being richer and more integrated. This will also drive the development of ESD protection technology towards integration—through integrated protection solutions, the design process can be simplified, protection efficiency can be enhanced, and more comprehensive guarantees can be provided for the stable operation of smart speakers.
……………………………………………………………………Company Profile……………………………………………………………………
JY Electronics serves a global customer base across the automotive, industrial & power, computing, consumer, and mobile & wearables industries. Our extensive product portfolio includes Schottky diodes, TVS and ESD protection devices, MOSFETs, LDOs, power ICs, battery protection & segment driver ICs, industrial & automotive-grade sensors, high-side switches (HSD), current sensors, and automotive switch input chips. We are committed to continuous innovation, delivering high-quality products that empower our customers to develop energy-efficient and sustainable solutions.
For samples or a quotation, please contact us at market@jy-electronics.com.cn.
