TOKYO — (BUSINESS WIRE) — October 12, 2017 — Toshiba Electronic Devices & Storage Corporation has launched “TB9120FTG,” a constant-current 2-phase stepping motor driver for automotive applications. The new IC outputs a sine-wave in electric current using only a simple clock input interface, with no need for an advanced functional MCU or dedicated software. Sample shipments start in November, with mass production scheduled to start in July 2019.

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Toshiba Electronic Devices & Storage Corporation: A constant-current 2-phase stepping motor driver "TB9120FTG" for automotive applications. (Photo: Business Wire)

TB9120FTG incorporates DMOS FETs with low on-resistance (upper + lower = 0.7Ω (typ.)), which achieve a maximum current of 1.5A. Both the DMOS FETs and the controller that generates micro-stepping sine-waves (supporting up to 1/32 steps) are housed in a small QFN type package (6.0 mm x 6.0 mm). The new IC delivers an operating temperature range of -40 to 125℃, and it will be qualified against AEC-Q100, a certified standard for electronic components for automotive applications. It is suited to a wide range of general uses, including adjusting the projection of heads-up displays and various valve controllers.

Main Features of New Product

• Simple clock input interface
  - Advanced functional MCU or software are not required to output sine-waves.

• Micro step drive, supporting up to 1/32 steps.
  - Less motor noise
  - Smoother and more precise control

• Stall^[1] detection circuit
  - A detection signal is output from a dedicated pin after detecting a stall.

• Constant-current PWM control
  - Mixed decay mode ensures stable current flow through the motor.

• Built-in error detections with a warning signal output function
  - Thermal shutdown, over-current detection, and load open detection

Main Applications

• Mirror adjustment for the projection position of heads-up displays
• Control of various valves