Sine wave current output with clock input interface
Maximum current of 1.5A with low on-resistance DMOS FET


Toshiba Electronic Devices & Storage Corporation announced on the 17th the launch of the 'TB9120AFTG', a constant current 2-phase stepping motor driver for automotive applications.

The TB9120AFTG outputs sine wave current with only a simple clock input interface, so no advanced MCU or dedicated software is required.

The TB9120AFTG is the successor to the 'TB9120FTG' released last year, and Toshiba says it has improved noise resistance.

By integrating a DMOS FET with low on-resistance (upper+lower=0.8Ω (typ.)), a maximum current of 1.5A is achieved. Both the DMOS FET and the controller generate micro-stepping sine waves (supporting up to 1/23 steps) and are housed in a small QFN package (6.0 mm × 6.0 mm).

The operating temperature range is -40 degrees Celsius to +125 degrees Celsius, and it is AEC-Q100 qualified, which is the standard for electronic components for automotive applications.

It is suitable for a variety of general-purpose vehicle applications that use stepping motors, such as adjusting the projection position of a heads-up display or an expansion valve in a refrigerant circuit.