Electronics and Semiconductors

TI introduces BLDC motor driver for control systems

23 February 2021
The DRV3255-Q1 motor driver system is designed to work in systems such as traction inverters and starter generators in mild hybrid electric vehicles (MHEVs). Source: TI

Texas Instruments has introduced a Grade 0 brushless DC (BLDC) motor driver for 48 V high power motor control systems.

The DRV3255-Q1 motor driver helps to shrink the motor system size by as much as 30% while increasing protection and output power. The driver is designed to work in systems such as traction inverters and starter generators in mild hybrid electric vehicles (MHEVs).

TI said to help decrease greenhouse gas emissions globally, car makers are increasing the production of MHEVs that use 48 V motor drive systems to reduce emissions from a vehicle’s internal combustion engine. The DRV3255-Q1 allows OEMs to build a motor drive system to help enable MHEV systems up to ASIL D, supplying as much as 30 kW of motor power, which can improve the response time of a 48 V motor drive system in heavy vehicles.

“A 48-V system is a step-change that original equipment manufacturers [OEMs] can implement to meet goals around reducing emissions, while also adding power for advanced driver-assistance system features and managing power-hungry loads such as the heating, ventilation and air conditioning system,” said Asif Anwar, director of the powertrain, body, chassis and safety service at Strategy Analytics. “Combining leading-edge performance characteristics with functional safety and Grade 0 translates to real-world, system-level operational benefits that will help OEMs achieve these goals.”

TI said the motor driver is the industry’s first three-phase, 48 V BLDC motor driver to integrate high- and low-side active short-circuit logic, eliminating external transistors and control logic. The active short-circuit logic feature gives motor designs the ability to arrange metal-oxide-semiconductor field-effect transistor (MOSFET) connections based on system needs and prevents catastrophic system failures due to overvoltage. The fault response of the motor driver automatically switches the motor driver to activate short-circuit mode in overvoltage conditions, protecting the vehicle’s motor and electrical components from overvoltage stress while optimizing system performance.

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