Allegro Announces New Low-Voltage Stepper/Dual Dc Motor Driver

Allegro Announces New Low-Voltage Stepper/Dual Dc Motor Driver

Allegro’s A3901,the first device in a planned series of low-V motor drivers targeted at the portable market, is a dual H-bridge low-V motor driver capable of operating one stepper motor or two DC motors. MOSFET output stages substantially reduce the voltage drop and the power dissipation of the outputs of the A3901 compared to typical drivers with bipolar transistors.

Small Package Size, Low Voltage Operation and Low sleep Mode Current

The A3901 is designed for portable applications with a power off (sleep mode) current of 50 nA (typical) and an operating voltage range of 2.5 V to 5.5 V. Output current can be regulated by pulse width modulating (PWM) the inputs.

Both H-bridges can be paralleled for higher current operation. Allegro's A3901 offers a very small package size, low operating voltage and low voltage drop MOSFET outputs. Internal circuit protection includes thermal shut down with hysteresis, transient-suppression diodes and crossover current protection.