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Toshiba TB9120AFTG Automotive Stepping Motor Driver

Toshiba TB9120AFTG Automotive Stepping Motor Driver is a constant current, 2-phase, bipolar stepping motor driver with a clock input interface and a PWM constant-current control system. The TB9120AFTG driver is suited to a wide range of automotive general applications using stepping motors. The AEC-Q100 component uses a wettable flank QFN package with excellent solderability. An advanced functional MCU or dedicated software is not required. Supporting full-step to 1/32 step selectable excitation mode, less motor noise and smoother control are achieved. The PWM constant-current control allows stable output waveforms in mixed decay mode. Upon detecting a stall, a stall detection signal will be received by a microcontroller and fed back into the system.

Features

  • Two-phase bipolar stepping motor that can be driven with a single chip
  • Adoption of PWM constant-current control
  • Built-in a mixed decay mode
  • Excitation mode selectable
    • Full step
    • Half step
    • Quarter step
    • 1/8 step
    • 1/16 step
    • 1/32 step
  • 0.8Ω typical on-resistance of power MOSFETs 
  • 40V maximum input power supply voltage (VBAT) 
  • 2.0A typical overcurrent detection, maximum output, driving current
  • 5V (VccOUT) internal voltage
  • Anomaly detection functions
    • Over-temperature detection
    • Overcurrent detection
    • Load open detection
    • Low voltage detection
  • DIAG output
    • Over-temperature detection
    • Overcurrent detection
    • Load open detection
  • Stall detection function and flag output function if detected
  • Standby function
  • 7V to 18V operating power supply voltage [VBAT(opr.)] range, only some of the functions are guaranteed in 4.5V to 7V
  • 100kHz maximum clock input frequency (fCLK)
  • -40°C to 125°C operating temperature range
  • VQFN28 package
  • AEC-Q100 qualified

Applications

  • Mirror adjustment for the projection position of heads-up displays
  • Expansion valves in refrigerant circuits for automotive air conditioners and battery management systems
  • Idle speed control valves
  • Other applications using automotive stepping motors

Block Diagram

Block Diagram - Toshiba TB9120AFTG Automotive Stepping Motor Driver

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Toshiba TB9120AFTG Automotive Stepping Motor Driver