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Stepping Motor Drivers

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Make Your Motor Smart

Stable and precise control make stepper motors sutiable for applications such as printers, office appliances and industrial equipment.

To avoid stalling and achieve stable operation sufficient current margin is needed.  To improve efficiency and suppress excess heat generation torque margin control is highly desirable. This could require complicated current adjustment by real-time monitoring of motor torque and current feedback, using additional sensors and microcontrollers. To solve these problems, Toshiba has developed Active Gain Control (AGC) technolgoy.  AGC automatically optimizes the motor current depending on the torque needed. It prevents motors from stalling and provides the optimum efficient motor control solution.

Motor Control Solutions For A Variety Of Applications

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

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

agc_img_02

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 the motor drive current according to the load conditions. This feedback process requires extremely complicated control. Toshiba offers motor driver ICs incorporating Active Gain Control (AGC) technology, which sense a motor's load torque and automatically optimizes the 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

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

Active Gain Control (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.

Active gain control (AGC) technology

Active gain control (AGC) technology

Download a Reference Design with Active Gain Control (AGC)

Toshiba offers various stepping motor drivers that deliver the substantial benefits of Active Gain Control (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.

Bill Of Materials (BOM)
Bill Of Materials (BOM)

Circuit schematic
Circuit schematic

Gerber data
Gerber data

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

Product Lines: Stepping Motor Drivers

*1 The TB67S105 and TB67S145 do not support micro-stepping.

Stepping Motor Drivers

Stepping Motor Drivers Product Lineup

Features of Toshiba's Stepping Motor Drivers

Extensive product lineup

Extensive product lineup

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

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

Toshiba's Original 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

Contacts

If you have any queries, click one of these links:

Technical queries
Queries about purchasing, sampling and IC reliability
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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.