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Stepping motor drivers Stepping motor drivers Stepping motor drivers Stepping motor drivers Previous Next

Use stepping motors to move to the next step

The mechanical subsystems of mechatronic products use many stepping motors, which consume excessive current so as not to go out of step and therefore generate much heat.
Active gain control (AGC) uses a simple technique to solve this problem, enhancing the value of products.

Optimizing the amount of current necessary to drive a stepping motor in real time

Simple system that optimizes the drive current in real time

To provide sufficient margin for the motor torque required, motor control drivers (MCDs) generally supply a motor drive current greater than the peak current at the maximum load. This means that extra current continues flowing all the time. In order to minimize unnecessary current consumption, a sensor or a microcontroller is used to monitor the changes in load conditions, thereby adjusting a motor drive current according to the load conditions. This feedback process requires extremely complicated control. Toshiba offers motor driver ICs incorporating AGC technology, which sense a motor's load torque and automatically optimize a motor drive current. This makes it possible to prevent a motor from going out of step while simplifying high-efficiency motor control.

Improving efficiency, saving energy, and significantly reducing heat dissipation in a motor

AGC technology automatically adjusts a motor drive current according to a motor's load conditions in order to reduce extra current, thereby considerably reducing the amount of heat generated by the motor driver IC and the motor. This helps reduce overall heat generation in a system and the resulting degradation.

Improving efficiency, saving energy, and significantly reducing heat dissipation in a motor

Active gain control (AGC) technology


Toshiba offers an extensive lineup of stepping motor drivers fabricated using a BiCD process that provides high accuracy and high-current capability. Toshiba's stepping motor drivers are available in bipolar and unipolar configurations.

Product Lines: Stepping Motor Drivers

(*1) TB67S105 & TB67S145 不支援 micro-stepping

Stepping Motor Drivers

步進馬達驅動器 產品陣容



Extensive product lineup


Solutions for customers' needs and issues based on leading-edge technologies


1. Advanced Dynamic Mixed Decay (ADMD) Technology

Toshiba's original ADMD technology tracks input current more closely than the conventional mixed-decay mode, making highly efficient motor control possible at high rpm.

Conventional Mixed Decay:Missed step at high rpm / ADMD Technology:Precise microstep control even at high rpm

Products incorporating the ADMD technology:
TB67S101A TB67S102A TB67S103A TB67S109A TB67S261 TB67S265 TB67S269 TB67S508

2. Advanced Current Detect System (ACDS) Technology

Toshiba's original ACDS technology enables motor drive with highly accurate constant current without requiring external current-sensing resistors.
The reduced part count also helps reduce the board area and the bill-of-material (BOM) cost.

Conventional Technology:Two resistors with high electrical ratings are necessary. / ACDS Technology:No external resistor is required.

Products incorporating the ACDS technology:
TB67S141 TB67S142 TB67S145 TB67S149 TB67S179 TB67S508

3. Active Gain Control (AGC) Technology

AGC is Toshiba’s unique stepping motor technology to automatically optimize the drive current in real time according to load torques. It helps reduce unnecessary current and drastically cut power consumption and heat generation.

Active Gain Control (AGC) Technology

4. Anomaly detection technology

It has built-in circuits for detecting abnormalities such as low-voltage (UVLO), overcurrent (ISD), and overheating (TSD).

This makes it possible to build a highly reliable system.

(Note: The built-in error detection function differs depending on the product.)

5. Micro-step drive

Whereas the full-step drive turns the currents of the two windings on and off and rotates them by a fixed angle, the micro-step drive can rotate them at a step angle finer than the basic step angle by changing the current ratio of the two windings in a stepwise manner.

The range is 1/4, 1/8, 1/16, 1/32, and 1/64 (steps).

Full-step mode

The step angle is 360 degrees divided by the total number of poles.

For the four poles, 360 degrees/4 = 90 degrees.

Assuming there is a 36-pole motor, 360 degrees/36 = 10 degrees, and the single-step operating angle of the full-step mode is 10 degrees.

Half-step mode

One step angle of the half-step mode is 1/2 of the full-step mode.

Micro-step mode

One step angle of the micro-step mode can be selected to be 1/4 of the full-step mode and a finer step angle.

(Example 1/4)

6. High-Voltage Analog Process Technology

Fabricated using a state-of-the-art high-voltage analog process (130-nm BiCD process), Toshiba's stepping motor drivers combine low-voltage control circuitry with high-voltage DMOS output drivers on the same monolithic structure. Consequently, high-voltage motor drivers rated at 84 V can be housed in the small WQFN48 (7 mm × 7 mm) package, which helps reduce the solution size.

High-Voltage Analog Process Technology

Downloading reference designs

Toshiba offers various stepping motor drivers that deliver the substantial benefits of AGC. Stepping motor drivers with a clock input and those with a phase input are both available. If you want to evaluate your product plan or design using a stepping motor incorporating AGC technology, reference designs are available for download.

Downloading reference designs



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·Before creating and producing designs and using, customers must also refer to and comply with the latest versions of all relevant TOSHIBA information and the instructions for the application that Product will be used with or for.