Two motors in one package reduce footprint

6th September 2016
Caroline Hayes


Combining a bipolar stepper and high current DC motor driver IC in a single package, Allego MicroSystems Europe has announced the A5989 40V motor driver IC.

The A5989 is capable of driving one stepper motor and one DC motor. The bipolar stepper driver outputs are rated up to 1.6A and the high current DC driver at 3.2A. Fixed off-time pulse width modulation (PWM) current regulators, along with 2bit, non linear DACs allow stepper motors to be controlled in full, half, and quarter step modes.

The integration into a single package reduces the PCB footprint and the number of external components, to save space in consumer, industrial and office automation equipment, such as point of sale, lottery, ticketing, laser, inkjet and label printers, copiers, vending, and ATM machines.

The stepper driver PWM current regulator uses the company’s patented mixed-decay mode for reduced audible motor noise, increased step accuracy, and reduced power dissipation. The DC driver can operate in forward, reverse, coast and brake modes with either fast or slow PWM decay control. 

Protection features include thermal shutdown with hysteresis, under voltage lockout , crossover current, and over current protection. Low current sleep mode is included to improve efficiency.

The IC is supplied in a leadless 6.0 x 6.0 x 0.9mm, 36pin QFN package with exposed power tab for enhanced thermal performance. The package is lead (Pb) -free, with 100% matt-tin leadframe plating.

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