EC fans are now becoming the mainstream for most HVAC systems amid industry demand for compact, low-noise, high-efficient and smart designs. But shifting from “discrete-component designs” to “highly-integrated platforms” burdens R&D teams with complex PCB layouts, EMC certification delays, time-intensive motor parameter tuning, and fragmented platform reusability.

Fortior’s FS95C6BS overcomes these barriers as the industry’s first monolithic SiC MCU solution that integrates a high-performance MCU, gate drivers and SiC MOSFETs in a single package.

"Discrete Design” Bottleneck in EC Fan Development

Conventional discrete architectures hold HVAC EC fan innovation with four systemic challenges.

• Bulky PCB Footprints: Discrete components (MCU, pre-driver, power MOSFETs and protection circuits) waste board space and lengthen current loops

• EMC Certification Delays: Scattered routing and parasitic noise degrade EMI performance and delay product certification

• Tedious Motor Parameter Tuning: Motor variations demand heavy manual calibration, making R&D schedules difficult to predict

• Zero Platform Reusability: Custom hardware for every motor model multiplies BOM complexity and software maintenance costs

These are not "minor inconveniences", but systemic engineering challenges that directly impact development schedules, BOM costs, and product consistency.

1.FS95C6BS to Redefine Integration at System Level

 FS95C6BS is not merely a functional aggregation, but a hardware-architecture revolution for EC fan control.

1）More Compact & Integrated Design

The advanced all-in-one architecture integrates the entire control system into a compact 14mm × 22mm package.

FS95C6BS for EC Fan Applications

As shown above, this 14mm × 22mm monolithic integration replaces power MOSFETs, drive circuits and complex logic control units to unlock extra PCB space for airflow optimization and higher system efficiency.

Fully Embedded Analog Peripherals: FS95C6BS embeds high-speed ADCs, DACs, comparators, operational amplifiers, etc. This deep integration reduces external PCB components, enhances system reliability, and improves manufacturing efficiency.

2）SiC MOSFETs to Power Energy Efficiency

FS95C6BS incorporates SiC MOSFETs to achieve low conduction losses and fast switching speeds.

This enables HVAC equipment to maintain stable and high-performance operation with lower heat generation, which simplifies thermal design and ensures compliance with mainstream energy efficiency criteria such as Energy Star.

3）High-Frequency PFC to Lower System Cost

FS95C6BS supports high-frequency PFC (up to 80kHz) to downsize inductor size, save PCB space and cut BOM & manufacturing costs.

2.Smart Control: One Platform for All Motors

Motor parameter tuning typically occupies over 50% of the overall project development cycle. Powered by a dual-core architecture (8051 + ME), FS95C6BS reduces CPU load and enables “smart” control as a standard onboard feature.

1）Hardware-based Control Algorithms: FS95C6BS includes dedicated hardware functional blocks for deadtime compensation, narrowpulse elimination, and minimum sampling blanking. It offloads these complex logic tasks from software algorithms to hardware for higher control precision and faster dynamic response.

2）Smart Parameter Identification: With parameter identification algorithms, FS95C6BS supports automatic calibration for motor parameters.

3）Platform Reusability: One single hardware platform covers all EC fan motor variants. Fast configuration via automatic parameter identification greatly reduce ongoing software maintenance costs during product updates.

3. Industrial-grade Reliability and Streamlined Certification

EC fans are required to comply with UL60730-1 Class B safety standards. FS95C6BS is designed from the ground up to ensure industrial-grade reliability and simplify the certification process.

1）EMC-optimized Architecture: The integrated power loop effectively suppresses parasitic effects for smoother and faster EMC certification.

2）Multiple Protections: OCP, OVP, TSD, UVLO, etc. to ensure safe and uninterrupted operation of HVAC equipment under all conditions.

Wide Applications to Cover Entire HVAC Ecosystem

4.Transition from "Discrete Designs" to "Integrated Platforms"

Traditional discrete designs no longer face performance limitations, but create systemic bottlenecks that hinder product innovation, cost control and scalable growth.

FS95C6BS is not merely a singlefunction chip, but a complete systemlevel solution tailored for HVAC EC fan applications. It resolves industry pain points across four core dimensions:

• Simplify hardware design

•  Lower motor algorithm barrier

• Ensure certification certainty

• Cut cross-platform software costs across diverse fan motors

For HVAC equipment manufacturers pursuing efficient R&D, rapid time-to-market, stable quality, and costeffective performance, FS95C6BS is an ideal solution to enable seamless platform-based evolution and high-end upgrades of EC fan products.

More Compact, Smarter Integration, Better EMC, Higher Efficiency