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Toshiba Electronic Devices & Storage Corporation Starts Sample Shipment of Constant-Current 2-Phase Stepping Motor Driver for Automotive Applications

2017-10-12 | Return

TOKYO - Toshiba Electronic Devices & Storage Corporation has launched “TB9120FTG,” a constant-current 2-phase stepping motor driver for automotive applications. The new IC outputs a sine-wave in electric current using only a simple clock input interface, with no need for an advanced functional MCU or dedicated software. Sample shipments start in November, with mass production scheduled to start in July 2019.

TB9120FTG incorporates DMOS FETs with low on-resistance (upper + lower = 0.7Ω (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 mm x 6.0 mm). The new IC delivers an operating temperature range of -40 to 125°C, and it will be qualified against AEC-Q100, a certified standard for electronic components for automotive applications. It is suited to a wide range of general uses, including adjusting the projection of heads-up displays and various valve controllers.

Main Features of New Product

>Simple clock input interface
- Advanced functional MCU or software are not required to output sine-waves.

>Micro step drive, supporting up to 1/32 steps.
- Less motor noise
- Smoother and more precise control

>Stall[1] detection circuit
- A detection signal is output from a dedicated pin after detecting a stall.

>Constant-current PWM control
- Mixed decay mode ensures stable current flow through the motor.

>Built-in error detections with a warning signal output function
- Thermal shutdown, over-current detection, and load open detection

Main Applications

>Mirror adjustment for the projection position of heads-up displays

>Control of various valves

Main Specifications

Part number	TB9120FTG
Driving method	Constant-current PWM control
Stepping mode	Micro step drive, supporting up to 1/32 steps
Number of drive motors	Single 2-phase stepping motor
On resistance	Upper + Lower = 0.7 Ω (typ.) at 25 °C
Output current	1.5 A (absolute maximum rating)
Error detections	Stall detection, thermal shutdown, over-current detection, and load open detection
Operating voltage range	7V to 18V (absolute maximum rating = 40V)
External power supply	Single power supply
Operating temperature range	-40 to 125°C
Package	P-VQFN28-0606-0.65 6.0mm x 6.0mm Wettable pins with excellent solderability
Reliability	Qualified based on AEC-Q100
Sample shipment	November 2017
Mass production	July 2019 (scheduled)

Note:

[1] Motor stall: When motor rotation deviates from the control signal, stalling occurs and the motor stops rotating.

Source：http://www.semicon.toshiba.co.jp/eng/