YiHi Chipset Technology Evolution

From E-Vapor Control to Multi-Industry Intelligent Control Solutions

In the world of electronic vaporization, the true foundation of user experience has never been appearance or specifications alone, but the depth of control behind the system.

YiHi's chipset journey began with a simple question:
how to drive vaporization safely, stably, and consistently under real-world conditions.

Over more than a decade of continuous development, this focus gradually shaped a control philosophy that now extends beyond e-vapor devices into multiple intelligent control applications.

2014 | The Beginning of Vapor Control

In 2014, YiHi introduced the SX300 series chipset, marking its formal entry into electronic vapor control.

At this stage, the priority was not complexity, but reliable power output, safety protection logic, and stable handling of different load conditions, laying the groundwork for future high-level control systems.

2015 | High-Precision Temperature Control Enters Mass Production

In 2015, YiHi launched the SX350J, SX350J-V2, and SX450J chipsets.

These solutions brought high-precision temperature control into mass-production environments, transforming temperature control from a niche concept into a practical and repeatable solution for everyday devices.

During this period, YiHi became one of the key global technology solution providers in the electronic vapor industry.

2016 | Wireless Connectivity and System Interaction

In 2016, YiHi joined the Bluetooth SIG and introduced wireless connectivity into vapor device chipsets, releasing:

• SX480J-BT chipset

• SX485J-BT chipset

• SX550J-BT chipset

Alongside the hardware, YiHi developed its own application, SXi-Q, enabling device status display and parameter interaction.

Later, due to regulatory and platform policy changes, the application was discontinued:
the iOS version was removed in 2019, and the Android version was also phased out due to regional legal restrictions.

Although this chapter came to an end, it provided YiHi with valuable experience in wireless communication, user interaction systems, and hardware-software coordination, influencing subsequent chipset architectures.

2017 | High-End Customization and Special Projects

In 2017, YiHi developed the SX590J chipset for Bugatti Vapor (Bugatti-e), a high-end customized vapor device project.

This collaboration placed higher demands on consistency, output precision, and control refinement, further strengthening YiHi’s expertise in premium and customized control solutions.

In the same period, gravity sensing technology was also introduced in selected devices, with Sigelei Legend series serving as a representative application, enhancing interaction behavior and safety performance in different usage orientations.

2017–2020 | Long-Term Development of ESS Electronic Spray Technology

Between 2017 and 2020, YiHi invested nearly three years in the development of ESS Intelligent Electronic Spray Technology.

This technology applied a precise, on-demand liquid delivery concept to vapor control, aiming to maintain freshness and consistency with every activation.

Representative ESS solution chipsets include:

• SX605J

• SX633J

• SX635J

• SX650J

• SX680J

• SX681J

• SX685J

This stage marked YiHi's transition from single-parameter control toward coordinated vaporization process control.

2021–2023 | Pure Intelligent Dry-Hit Protection Technology

Building on years of vapor control experience, YiHi initiated the development of Pure Intelligent Dry-Hit Protection Technology in 2021, reaching maturity around 2023.

Pure technology focuses on early detection and intervention under low-liquid or abnormal conditions, helping prevent unpleasant dry hits before they occur.

Key Pure technology chipsets include:

• SX255J

• SX303J

• SX304J

Pure technology continues to be refined and optimized today.

2022 | Wireless Firmware Upgrade Capability

In 2022, YiHi introduced the SX750J chipset, enabling Wi-Fi firmware upgrades and offering greater flexibility for solution updates and long-term maintenance.

2023 | Chipsets for Enthusiast-Level Devices

In 2023, YiHi released several chipsets designed for advanced users and enthusiast-grade devices:

• SX600J chipset

• SX600H chipset

• SX735J chipset

These solutions demonstrate stable handling of ultra-low resistance loads (down to 0.2Ω) and reliable performance in Bypass (direct output) mode, reflecting YiHi’s long-term experience in power control and safety management.

Beyond Electronic Vapor

Beyond electronic vaporization, YiHi’s engineering team has gradually accumulated control system experience across multiple industries, including:

· Medical nebulization devices
· Herbal and essential oil high-temperature regulated vapor systems
· Photography smoke machine control systems
· Intelligent automotive audio control systems

These cross-industry experiences continue to deepen YiHi’s understanding of power management, control logic, and safety-oriented design, and contribute to the ongoing refinement of its core control technologies.

Conclusion

YiHi's chipset development has always followed a long-term path focused on reliability, safety, and controllable performance.

From power control to temperature regulation, electronic spray systems, Pure dry-hit protection, and multi-industry vapor solutions, YiHi remains committed to turning complex control challenges into stable, repeatable, and dependable user experiences.