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About information presented in this cross reference

The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
TOSHIBA is not responsible for any incorrect or incomplete information. Information is subject to change at any time without notice.

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Stepping Motor Driver ICs

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.

Use stepping motors to move to the next step

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Stepping Motor Drivers Product Lineup

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About information presented in this cross reference

The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
TOSHIBA is not responsible for any incorrect or incomplete information. Information is subject to change at any time without notice.

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Product Lines: Stepping Motor Drivers

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.

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

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Toshiba's Original Technologies

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

1. Advanced Dynamic Mixed Decay (ADMD) Technology

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

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.

Products incorporating the ADMD technology:

2. Advanced Current Detect System (ACDS) Technology

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

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.

Products incorporating the ACDS technology:

3. Active Gain Control (AGC) Technology

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
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.

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

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

Half-step mode

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

Micro-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

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.

Evaluation kit and reference board

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.

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* PSpice is a registered trademark of Cadence Design Systems, Inc.

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