Toshiba Electronic Devices & Storage Corporation Starts Sample Shipment of Constant-Current 2-Phase Stepping Motor Driver for Automotive Applications

2017-10-12 | Return
TOKYO - 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.

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°C, 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

Main Specifications

Part number


Driving method

Constant-current PWM control

Stepping mode

Micro step drive, supporting up to 1/32 steps

Number of drive motors

Single 2-phase stepping motor

On resistance

Upper + Lower = 0.7 Ω (typ.) at 25 °C

Output current

1.5 A (absolute maximum rating)

Error detections

Stall detection, thermal shutdown, over-current detection, and load open detection

Operating voltage range

7V to 18V (absolute maximum rating = 40V)

External power supply

Single power supply

Operating temperature range

-40 to 125°C


6.0mm x 6.0mm
Wettable pins with excellent solderability


Qualified based on AEC-Q100

Sample shipment

November 2017

Mass production

July 2019 (scheduled)


[1] Motor stall: When motor rotation deviates from the control signal, stalling occurs and the motor stops rotating.