Product category:
Power Supply ICs and Controllers
News Release from: Toshiba Electronics Europe | Subject: TB6560
Edited by the Electronicstalk Editorial
Team on 24 August 2006
Microstepper chip takes PWM onboard
The TB6560 single-chip PWM chopper-type bipolar sinusoidal micro-step stepping motor driver delivers peak output currents of 3.5A.
Toshiba Electronics Europe (TEE) has launched a two-phase stepper motor driver that provides microcontroller-free 3bit microstepping 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
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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Incorporation of all PWM generation and decoding circuitry on-chip provides for the automatic generation of a smooth, sinusoidal microstep 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 0.6OHM with packages designed for high allowable losses.
This permits a dramatic improvement in thermal performance when compared with other driver products.
The TB6560 is available in a choice ofHzIP25 (TB6560HQ) and HQFP64 (TB6560FG) packages.
Both variants incorporate output monitor, reset and enable pins and feature built-in 100kohm pull-down resistors.
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