Stepper motors are essential in many modern applications nowadays. No matter if in 3D printers, in office equipment, cash dispensers, surveillance cameras or home appliances, those electric drives enable a very easy and precise positioning mode. As the stepper motor moves in discrete steps it can easily be rotated a finite fraction of a rotation at a time. In order to control them motor driver ICs come into play.
High Performance Device
Toshiba offers with the TB67S128FTG a bipolar stepping motor driver that is supporting up to 128 micro steps. The device integrates Active Gain control (AGC). It is responsible for the optimisation of the drive current to suit the required torque thus power savings can be realised. However, reduced power consumption often conflicts with the requirement of high speed and high performance. The TB67S128FTG achieves higher torque operation due to the enablement of a high current drive (50V / 5A). At the same time it operates with a low on-resistance (0.25Ω) which reduces heat generation.
More Safety With Less Noise
What can be more annoying than noisy office equipment? Due to the ability of 1/128 microstepping the new Toshiba TB67S128FTG reduces noise and vibration. Other drive ICs from Toshiba offer 32 steps. Thus, the new device offers a huge improvement in this respect. The TB67S128FTG also comes with several protection functions like thermal shutdown or overcurrent protection. Furthermore, an open detection function detects motor disconnection. It sets an error flag when it comes to a malfunction. Thus, equipment safety will be ensured.
Reducing cost and space is also critical for the application designers. Also here the TB67S128FTG offers advantages. The small 9mm x 9mm x 0.9mm, 0.5mm pitch QFN64 package with thermal pad shrinks the space required for layout. Toshiba’s current detection technology ACDS (Advanced Current Detection System), moreover, ensures that no external current detection resistor in needed, which cuts BoM cost and additionally reduces space needed. ACDS allows the control of motor current.
Toshiba Webinar Introduction
In an IEEE Globalspec webinar EBV organised together with Toshiba clever innovations within Toshiba’s motor control driver portfolio can be discovered. On January 22nd the webinar will guide you through solutions that optimize power consumption while maintaining torque, reducing vibration and noise. Register here.