Two-phase stepping motor driver streamlines system design

Designed for automotive use, the TB9120AFTG is a constant-current, two-phase bipolar stepping motor driver, which can significantly streamline motor system implementation, says Toshiba. It delivers a sine-wave output signal (with up to 1/32 incremental steps supported) while requiring only a simple clock input. There is no need for a sophisticated microcontroller or dedicated software, adds the company.

Each of the AEC-Q100-compliant TB9120AFTG driver ICs incorporates low on-resistance DMOS FETs, and can deliver a 1.5A (maximum) current. The large number of micro-steps supported can “significantly” reduce motor noise, with smoother operation and more precise control, says Toshiba.

The built-in mixed decay mode helps to stabilise the current waveforms. Protection features include over-current and over-temperature detection, plus thermal shutdown. There is also a stall detection function.

The TB9120AFTG is supplied in a compact VQFN package, measuring with 6.0 x 6.0mm. The package has wettable flanks to allow the use of automated optical inspection (AOI) ensuring the quality of solder joints.

Operating temperature range is -40 to +125 degrees C.

Target applications include battery management systems, or refrigeration circuit expansion valves for air conditioning.

Toshiba Electronics Europe (TEE) is the European electronic components business of Toshiba Electronic Devices and Storage. TEE offers European consumers and businesses a variety of hard disk drive (HDD) products as well as semiconductor products for automotive, industrial, IoT, motion control, telecomms, networking, consumer and white goods.

The company’s broad portfolio encompasses integrated wireless ICs, power semiconductors, microcontrollers, optical semiconductors, ASSPs and discrete devices ranging from diodes to logic ICs.

TEE is headquartered in Düsseldorf, Germany, with branch offices in France, Italy, Spain, Sweden and the United Kingdom providing design, manufacturing, marketing and sales.

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