Toshiba unveils high-current, selectable resolution micro-step stepping motor driver IC

Highly integrated PWM chopper-type driver reduces host micro overhead and delivers smooth and efficient motor control

Toshiba Electronics Europe has expanded its family of micro-step stepping motor driver ICs with a selectable resolution device capable of delivering peak output currents up to 5.0A. Featuring high levels of integrated functionality, the TB6600HQ will reduce component count in office automation equipment, industrial systems, and other applications requiring accurate, repeatable, maintenance-free operation.

The TB6600HQ single-chip, PWM chopper-type bipolar micro-step stepping motor driver offers forward and reverse rotation control and selectable 1/1, 1/2, 1/4, 1/8 and 1/16 step resolution. A smooth sinusoidal output supports low-vibration, high-efficiency motor operation, while selectable phase drive selection (2-phase, 1-2-phase, W1-2-phase, 2W1-2-phase and 4W1-2-phase excitation modes) provides significant design flexibility.

Because the TB6600HQ incorporates all PWM generation and encoding circuitry on chip a single clock signal is all that is needed for the automatic generation of the sinusoidal micro-step waveform. This allows engineers to use the TB6600HQ to reduce the control overhead on a host microcontroller or to create designs in which a single host device controls multiple motors.

The TB6600HQ is supplied in a HZIP25 package, has a built-in input pull-down resistance of 100k? and offers output monitor, reset and enable pins. On-board protection functionality comprises thermal shutdown (TSD), under-voltage lock out (UVLO) and over-current detection.

Based on Toshiba’s 0.13?m BiCD process, the TB6600HQ has a high output withstand voltage (VCC) of 50V. A typical on resistance of just 0.4? and a stand-by function support high-efficiency designs.