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Controls/MCUs??

Motor driver offers low operating voltage

Posted: 07 Jul 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Allegro MicroSystems? A3901? motor driver?

Allegro MicroSystems Inc. has developed a dual H-bridge low-voltage motor driver capable of operating one stepper motor or two DC motors. According to the company, 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.

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

The A3901 boasts 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. The new motor driver is supplied in Pb-free (100 percent matte tin leadframe) ten-lead MLP power package (3-by-3-by-0.75mm) with exposed thermal pad (suffix EJ).




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