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 function of music playback, they also integrate network functions such as weather inquiries, voice control, and travel and entertainment information searches. Among them, voice recognition is the most core technological highlight.
Working Principle of Smart Speakers
The normal operation of smart speakers relies on the collaborative work of various circuit modules. The core modules and their functional divisions are as follows:
[Figure: Working Principle of Smart Speakers]
Necessity of ESD Protection for Smart Speaker Buttons
ESD (Electrostatic Discharge) is one of the most common causes of electronic device damage, with approximately 70% of electronic device failures resulting from ESD interference. The exposed or easily accessible parts of smart speakers, such as interfaces, buttons, and sensors, are high-risk areas for ESD intrusion. Therefore, it is essential to design targeted ESD protection solutions.
As an interactive component directly operated by users, the buttons on smart speakers are highly susceptible to interference or damage from electrostatic discharge due to frequent human contact. This particular smart speaker is equipped with three functional buttons for controlling volume increase and decrease, as well as one-click disabling of the microphone and camera. From a circuit perspective, the buttons remain in an open-circuit state when not triggered. When a user presses a button, the circuit conducts, generating an output voltage of 5V and a current of 0.5A. Based on the above usage scenarios and circuit parameters, it is necessary to match the buttons with targeted ESD protection components.
ESD Protection Solution for Smart Speaker Buttons
Considering the operating parameters and ESD protection requirements of the buttons, TT0501MB from JY Electronics was ultimately selected as the protection device. The button circuit diagram and the schematic diagram of the ESD protection solution are as follows:
[Figure: Button Circuit Diagram of Smart Speakers]
[Figure: ESD Protection Solution for Buttons]
The following table presents an overview of the parameters of TT0501MB from JY Electronics.
The core parameters and advantages of TT0501MB from JY Electronics are listed in the table below. Its excellent performance can fully meet the ESD protection requirements of the buttons:
In conclusion, as a key interactive component of smart speakers, the ESD protection of buttons is a crucial aspect of ensuring the stable operation of the device. It is necessary to select an appropriate protection solution based on the actual usage scenarios and circuit characteristics.Looking ahead, the interface functions of smart speakers will become more diversified and integrated, which means that the ESD protection of interfaces will develop towards integration. This will enable comprehensive electrostatic protection to be achieved in a more efficient and convenient manner, further enhancing the reliability and service life of the devices.
……………………………………………………………………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.
