POWER AND LINEAR IC SOLUTIONS

Two-Phase Micro-Stepped Stepper Motor Driver Provide High Currents

Toshiba Electronics Europe (TEE) has launched a two-phase stepper motor driver that provides microcontroller-free 3-bit micro-stepping control for office automation and industrial applications requiring high current ratings and configuration flexibility.

The TB6560 single-chip PWM chopper-type bipolar sinusoidal micro-step stepping motor driver delivers peak output currents of 3.5A. Incorporation of all PWM generation and decoding circuitry on-chip provides for the automatic generation of a smooth, sinusoidal micro-step waveform for the high performance driving of bipolar type stepper motors from a single clock signal. The sinusoidal output enables the construction of low-vibration drives, while built in overtemperature protection circuitry further reduces the need for external components.



Providing both forward and reverse rotation control, Toshiba’s new IC offers significant flexibility by allowing phase drive selection for 2-phase, 1-2-phase, W1-2-phase and 2W1-2-phase excitation. Further flexibility comes from the ability to configure torque settings, in addition to a sophisticated Selectable Mixed Decay Mode (SMDM). SMDM allows the ratio of various decay settings to be adjusted so that coil discharge pattern can be modified according to motor load and speed. Choosing the best mix of decay modes allows PWM ripple to be minimised, reducing both audible noise and vibration.

Manufactured using a proprietary BiCD process, the TB6560 has a high withstand voltage of 40V and combines a low total bridge on resistance of 0.6Ω with packages designed for high allowable losses. This permits a dramatic improvement in thermal performance when compared with other driver products.


TB6560 Application

The TB6560 is available in a choice of HZIP25 (TB6560HQ) and HQFP64 (TB6560FG) packages. Both variants incorporate output monitor, reset and enable pins and feature built-in 100kΩ pull-down resistors.

Features

• Single-chip two-phase micro-step bipolar stepper motor driver
• High current: up to 3.5A
• Sinusoidal output
• 150kHz chopper-type operation
• Low power dissipation
• Clock-only interface enables microcontroller-less drives
• Selectable phase drive (2, 1-2, W1-2, and 2W1-2)
• Three-bit micro-stepping control
• 40V withstand
• Mixed Decay Mode
• Low on-resistance
• Protection circuitry
• Forward and reverse rotation control
• Built-in 100kΩ input pull-down resistor
• Output monitor, reset and enable pins equipped
• Choice of high power dissipation HZIP-25 or ultra-compact THQFP64 packaging
• Temperature range -30°C to +85°C

Applications

• Office automation
• Industrial drives

For further information, including the TB6560 Datasheet and the latest Motors and Mechatronics Catalogue with CD ROM, please click here.