Toshiba Electronic Devices & 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.
Toshiba: a constant-current 2-phase stepping motor driver TB9120AFTG for automotive applications. (Photo: Business Wire)
TB9120AFTG was developed as a successor to TB9120FTG, introduced in 2019 as Toshiba’s first automotive stepping motor driver, and provides improved noise resistance.
TB9120AFTG incorporates DMOS FETs with low on-resistance (upper + lower = 0.8Ω (typ.)), which achieve a maximum current of 1.5A[1]. 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 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.
Key features
- General multipurpose specifications, especially for automotive applications
- DMOS FETs with low on-resistance (upper + lower = 0.8Ω (typ.)), which achieve a maximum current of 1.5 A.
- Built-in error detections with warning signal output function: Over-current detection, thermal shutdown, and load open.
- Housed in a wettable flank VQFN package (6mm×6mm) with excellent solderability
- Operating temperature range: -40℃ to 125℃
- AEC-Q100 qualified
- Micro step drive, supporting up to 1/32 steps.
- Less motor noise, smoother and more precise control
- Uses only a simple clock input interface, with no need for an advanced functional MCU or dedicated software.
- Constant-current PWM control: Mixed decay mode stabilizes current waveforms.
- Stall detection function
- A stall detection signal is output from SD pin after detecting a stall.
- The detection signal can be received by a microcontroller and fed back to the system.
Applications
- Mirror adjustment for the projection position of heads-up displays
- Expansion valves in refrigerant circuits for automotive air conditioners and battery management systems
Main Specifications
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Part number
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TB9120AFTG
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Driving method
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Constant-current PWM control
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Excitation mode
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Micro step drive, supporting up to 1/32 steps
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Number of drive motors
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Single 2-phase stepping motor
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On resistance
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Upper + Lower = 0.8 Ω (typ.) at 25℃
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Output current
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1.5 A (absolute maximum rating)
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Error detections
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Stall detection, thermal shutdown, over-current detection, and load open detection
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Operating voltage range
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7 V to 18 V (Absolute maximum rating = 40 V)
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External power supply
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Single power supply
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Operating temperature range
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-40 to 125℃
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Package
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P-VQFN28-0606-0.65
6.0mmｘ6.0mm
Wettable pins with excellent solderability
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Reliability test
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AEC-Q100 qualified
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Mass production
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Started in April 2020
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Note:
[1] Actual driven motor current depends on the use environment, and such factors as ambient temperature and power supply voltage.
For more information about the new product, visit:
https://toshiba.semicon-storage.com/info/lookup.jsp?pid=TB9120AFTG
Click below for the product introduction video.
https://videoclip.toshiba.semicon-storage.com/ap-en/detail/videos/products/video/6171426835001/automotive-stepping-motor-driver-ic-tb9120aftg?autoStart=true
For more information about Toshiba’s automotive stepping driver ICs, visit:
https://toshiba.semicon-storage.com/ap-en/semiconductor/product/automotive-devices/automotive-stepping-motor-driver-ics.html