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步进电机驱动器

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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

产品阵容

东芝提供采用BiCD工艺制造而成的广泛的步进电机驱动器产品阵容,能提供高精确度和大电流能力。东芝的步进电机驱动器提供双极和单极结构。

Product Lines: Stepping Motor Drivers

*1 TB67S105和TB67S145不支持微步。

Stepping Motor Drivers

步进电机驱动器 产品阵容

东芝步进电机驱动器的特点

广泛的产品阵容

Extensive product lineup

用于解决客户需求和问题的基于先进技术的解决方案

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

东芝原创技术

1. 高级动态混合衰减(ADMD)技术

东芝原创的ADMD技术比传统的混合衰减模式更能紧密地跟踪输入电流,从而实现了高转速条件下的高效电机控制。

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

采用ADMD技术的产品:
TB67S101A TB67S102A TB67S103A TB67S105 TB67S109A TB67S261 TB67S265 TB67S269

2. 高级电流检测系统(ACDS)技术

东芝原创的ACDS技术实现了高精度恒定电流的电机驱动,且无需使用外部电流灵敏电阻器。
部件数量的减少也有助于缩小板尺寸和物料清单(BOM)成本。

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

采用ACDS技术的产品:
TB67S141 TB67S142 TB67S145 TB67S149 TB67S179

3. 高电压模拟处理技术

东芝的步进电机驱动器采用先进的高电压模拟处理(130nm BiCD工艺)技术制造而成,它在同一整体结构上结合了低电压控制电路和高电压DMOS输出驱动器。所以,额定电压为84V的高电压电机驱动器可以采用小型的WQFN48(7mm×7mm)封装,这有助于缩小方案尺寸。

Active Gain Control (AGC) Technology

4.异常检测技术

它内置了异常检测电路,比如低电压(UVLO)、过电流(ISD)和过热(TSD)电路。

这就确保了高可靠性系统的构建。

(注意:内置的错误检测功能因产品而异。)

5. 微步驱动

当全步驱动将两个绕组的电流打开或关闭,并以固定的角度旋转它们时,微步驱动器可以通过逐步改变两个绕组的电流比率,以相比于基本步进角度更精细的步进角度旋转它们。

范围是1/4、1/8、1/16、1/32和1/64(步)。

Full-step mode

步进角度是指360度除以总极数。

若是四极,即360度/4 = 90度。

假设是一个36极电机,即360度/36 = 10度,全步模式的单步工作角度即为10度。

Half-step mode

半步模式的一个步进角度是全步模式的1/2。

Micro-step mode

微步模式的一个步进角度可选择作为1/4全步模式和更精细的步进角度。

(举例1/4)

6.高电压模拟处理技术
东芝的步进电机驱动器采用先进的高电压模拟处理(130-nm BiCD工艺)技术制造而成,它在同一整体结构上结合了低电压控制电路和高电压DMOS输出驱动器。所以,额定电压为84V的高电压电机驱动器可以采用小型的WQFN48(7mm × 7mm)封装,这有助于缩小方案尺寸。

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.