Constant Current 2 Phase Automotive Stepper Motor Driver IC with Sine Wave Current Output

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ByDinesh Kumar 0

TB9120AFTG Stepper Motor Driver IC from Toshiba

Toshiba Electronic Devices & Storage Corporation has introduced the “TB9120AFTG” a 7 V to 18 V constant current 2 phase stepping motor driver for automotive applications. The new IC gives out a sine-wave current with the help of a simple clock input interface, this eliminates the need for an advanced functional MCU or dedicated software.

The TB9120AFTG was designed with the DMOS FETs with low on-resistance (upper + lower= 0.8Ω ) to 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). The micro-step drive operates smoother with less motor noise and more precise control.

The new automotive-qualified (AEC-Q100) IC delivers an operating temperature range of -40 to 125℃ and it is suitable for 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.

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