Toshiba launches constant-current 2-phase stepping motor driver

Toshiba Electronic Devices and Storage Corporation (Toshiba) has launched ‘TB9120AFTG’, a constant-current 2-phase stepping motor driver for automotive applications.

The new IC outputs a sine-wave current using only a simple clock input interface, with no need for an advanced functional MCU or dedicated software.

“TB9120AFTG incorporates DMOS FETs with low on-resistance (upper + lower = 0.8Ω (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 mmx6.0 mm),” Toshiba said in a statement.

“The new IC delivers an operating temperature range of -40 to 125℃, and meets AEC-Q100, a certified standard for electronic components for automotive applications. It is suited to a wide range of automotive general applications using stepping motors, such as adjustment of the projection position of heads-up displays, and in the expansion valves of refrigerant circuits.”

It is pertinent to mention here, TB9120AFTG is developed as a successor to TB9120FTG, introduced in 2019 as Toshiba’s first automotive stepping motor driver, and provides improved noise resistance.

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