BLDC motor IC with HFI for impressive low-speed torque with sensorless FOC.

MEV presents the FU6866 BLDC controller IC from Fortior Technology. It integrates state-of-the-art High Frequency Injection (HFI) technology to ensure high torque even at low speeds, setting new standards in motor control applications.

Significance & Innovation: HFI (High Frequency Injection) in the FU6866

High Frequency Injection technology allows for precise rotor position determination using high-frequency signals, even with very little or no movement. This means:

• Higher torque at low speed – ideal for applications where the motor is operated under load from standstill
• Reliable sensorless startup at heavy loads
• Robust sensorless control even where conventional methods (e.g., back EMF) do not provide sufficient signal evaluation
• Stable control and smooth transition between standstill and motion
• Reduced sensor hardware requirements – because the rotor position can be obtained directly through the injection process

Thanks to this feature, the FU6866 is particularly suitable for torque-critical applications during start-up, for systems with frequent changes between standstill and movement, and for compact motor controller solutions where additional sensors are impractical.

Technical highlights & features

In addition to HFI, the Fortior FU6866 offers the following outstanding technical features

• Dual-core architecture: Combination of a motor engine core (ME core) for real-time control and an MCU-core for application and system control
• Integrated 180V pre-driver: Direct control of external N-channel MOSFETs
• Supported control methods: FOC (Field-Oriented Control), trapezoidal and sine PWM, with and without sensors
• Analog and digital peripherals: 12-bit ADCs, PGAs, comparators, DACs, timers, PWM generators
• Communication interfaces: SPI, I²C, UART, LIN, CAN
• Flash memory: 32 KB with CRC integrity check
• AEC-Q100 Grade 1 certified: suitable for automotive applications
• Supply: 6,5 – 18 V, internal LDO + up to 180V for driver
• Package: QFN-56 (7 × 7 mm)

The combination of advanced control technology, HFI capability and high integration makes the FU6866 a powerful alternative to conventional motor control solutions.

FU6866 Block Diagram

Significance for MEV and its customers

By expanding its Fortior portfolio with the FU6866, MEV Elektronik is strengthening its position as a full-service provider for modern engine control solutions. Customers benefit from:

• Innovative technology from a single source – from design support to supply
• Access to the latest engine control ICs, especially for demanding, torque-critical applications
• Technical advice and application support from MEV’s experienced engineers

“The Fortior FU6866 opens up new possibilities for BLDC motor control,” says Guido Gandolfo, Product Manager at MEV Elektronik Service GmbH. “Thanks to HFI, the rotor position can be measured even at extremely low speeds – without the need for additional sensors. This means higher efficiency, more compact designs, and cost savings.”

Availability & Outlook

The Fortior FU6866 is available now. MEV offers samples, design kits, and comprehensive support for initial testing and integration. With this expansion, MEV underscores its commitment to consistently incorporating cutting-edge technologies into its portfolio and enabling customer solutions with real competitive advantages.

FU6866 will be presented at SPS show in Nuremberg (25 NOV to 27 NOV 2025) at the MEV booth 174 in hall 4. Experts from the manufacturer Fortior are on site.

About Fortior Technology

Fortior Technology (Shenzhen) Co., Ltd. is a leading provider of integrated circuits and system solutions for motor control, drive technology, and power electronics. The company develops and manufactures high-quality motor control ICs, gate drivers, digital signal controllers, and ASICs for applications in industry, automation, household appliances, power tools, and automotive.

With a focus on efficiency, precision, and integration, Fortior offers customized solutions for BLDC, PMSM, servo-, and stepper motor applications. The products are characterized by high reliability, robust protection mechanisms, and outstanding control performance – and are used by leading OEMs worldwide.

Downloads & Links

Contact

If you would like to know more about FU6866 from Fortior, please contact:

Guido Gandolfo
Product Line Manager
Motion Control
+49 5424 2340-57
ggandolfo@mev-elektronik.com