Motor control chipset supports functional safety requirements

October 11, 2012 // By Christoph Hammerschmidt
Faster time to market for safety-critical automotive and transportation motor control applications promises Texas Instruments the users of its new safety platform - a total of 12 new Hercules TMS570 ARM Cortex-R4 safety microcontrollers, a complementary TPS65831-Q1 multi-rail safety power management integrated circuit (PMIC) and the DRV3201-Q1 safety motor driver.

These products form a “safety motor control chipset” and maximize failure detection and mitigation while minimizing software overhead. The new motor control safety chipset adheres to the SafeTI-26262 and SafeTI-61508 design packages, helping customers more easily achieve ISO 26262 and IEC 61508 certification and accelerate time to market.

Perfect for advanced driver assistance systems, electric power steering, hybrid and electric vehicles, rail propulsion control, aviation anti-skid control, off-road vehicles and more, the newest Hercules TMS570 safety microcontrollers expand the product line to include 36 configurations from which customers can choose to meet application-specific needs. The new Hercules TMS570LS12x/11x floating-point safety microcontrollers provide additional memory and performance configurations with expanded motor control capabilities while the Hercules TMS570LS04x/03x safety microcontrollers provide a smaller package, lower cost, entry-line solution with integrated motor control interfaces. The compatible PMIC combines multiple power supplies and safety features in a single device to reduce design time and board space. First on the market to support start/stop functionality, the motor driver integrates functional safety architecture for protection and monitoring.

Features and benefits of the new Hercules TMS570 safety microcontrollers:

  • Expanded range of performance and memory options, from 80 MHz to 180 MHz lockstep ARM Cortex-R4 cores and 256KB, 384KB, 1MB and 1.25MB Flash, provide designers more choices and scalability for their feature-rich safety products.
  • Achieve ISO 26262 and IEC 61508 more easily in system designs through component compliance to industry safety standards.
  • Hardware safety features provide a high level of online diagnostics with lockstep cores; memory protection for the CPU and bus masters; error correction code (ECC) for Flash and RAM with single-bit error correction and double-bit error detection (SECDED); CPU and RAM built-in-self-test (BIST) for detection of potential latent faults; intelligent error signaling module for action based on safety error; parity on peripheral RAMs; redundant analog-to-digital converters (ADCs) and timers; and continuous voltage and clock monitoring.
  • Integrated motor control capability with enhanced pulse width modulation,