TB9081FG 3-Phase BLDC Motor Pre-Driver IC – ASIL-D Compliant Power Steering & EPS Driver Chip

The TB9081FG is a sophisticated three-phase brushless DC motor pre-driver IC developed specifically for demanding automotive applications.
It is engineered to drive high-current loads in electric power steering systems, offering a robust foundation for safety-critical chassis control modules.
The device integrates a 3-phase pre-driver circuit with high-side and low-side charge pumps, enabling efficient control of external power MOSFETs.
A built-in fail-safe relay pre-driver with five channels provides independent control for motor-side and power-supply-side isolation.
The high-speed motor current sense circuit delivers precise feedback to the MCU for accurate torque and speed regulation.
Comprehensive protection features include VB and VCC over/under voltage detection, over-temperature shutdown, and external FET short-circuit detection.
An integrated ABIST/LBIST diagnostic capability detects latent faults in the protection circuits, ensuring functional safety compliance.
The device supports flexible fault response configuration via SPI communication, allowing system designers to tailor behavior to specific applications.
With an operating voltage range of 4.5V to 18V and 40V peak load dump survivability, it withstands harsh automotive electrical transients.
The wide temperature range of -40°C to 125°C guarantees reliable performance under extreme under-hood conditions.
Qualified to AEC-Q100 and developed according to ISO 26262 ASIL-D standards, this IC meets the highest automotive safety integrity level.
The SPI interface with CRC error checking ensures reliable communication with the host microcontroller.
Packaged in a compact 64-pin LQFP, this pre-driver IC minimizes PCB footprint while delivering 11 pre-driver channels.
Engineers designing advanced EPS, brake-by-wire, or other safety-critical motor control systems will find this IC an essential solution.