3-phase gate driver for braking systems and power steering

Infineon Technologies has developed a three phase MOSFET gate driver for ASIL-D safety critical applications such as braking systems and power steering.

The Motix TLE9189 gate driver supports MOSFETs in 12V brushless DC (BLDC) motors in safety critical applications in x-by-wire designs. The device is qualified according to AEC Q100 Grade 0 and ISO 26262 (ASIL D) for brake-by-wire and steer-by-wire systems, where conventional mechanical connections will be eliminated in the future.

“With the TLE9189 we are introducing the 4th generation automotive 3-phase smart gate driver IC to the market. It offers enhanced functionalities and unique features for intelligent motor control supporting the increasing demand of our customers for by-wire-solutions,” said Andreas Doll, Senior Vice President and General Manager Smart Power from Infineon. “The high reliability of the motor control design enabled by our new device is particularly important for safety-critical by-wire solutions.”

The Motix TLE9189 gate driver IC will be available in two different packages, the TQFP-48 (9 x 9 mm²) and the VQFN-48 (7 x 7 mm²). This allows customers to select the appropriate package for their application requirements.

The supply voltage range is from 4.2 V to 36 V and is optimized for 12 V automotive battery systems. It features a conventional motor control concept consisting of PWM input and integrated current sense amplifiers for accurate current sensing with flexibility and granularity for gate sequencing.

Various monitoring and diagnostic functions are integrated for monitoring of the device, the inverter, the microcontroller and the MCU interfaces. The product also features the unique adaptive MOSFET control function, patented by Infineon, which can help improve EMC performance, achieve target switching time and reduce power losses.

Infineon provides technical documentation including application notes, simulation models, configuration tools and a complex device driver.

The Motix TLE9189 gate driver in VQFN and TQFP samples are available now and will be demonstrated at electronica 2024 in Munich from November 12 to 15.