PWM Motor Driver IC minimizes switching power losses.

Press Release Summary:



Supplied in 24-pin surface-mount SOIC with 2 pairs of batwing leads, Model A4970 utilizes DMOS output technology that drives windings of bipolar stepper motor or bidirectionally controls 2 DC motors. Both bridges can sustain 45 V and include internal PWM control of output current to 750 mA. For PWM current control, max output current is determined by user selection of reference voltage and sensing resistor. Two logic-level inputs select output current limits of 0, 33, 67, or 100% of max level.



Original Press Release:



Allegro MicroSystems, Inc. Announces New Dual, Full-Bridge PWM Motor Driver IC



Significant Reduction in the Quiescent and Switching Power Losses

Worcester, MA - Allegro MicroSystems, Inc. announces the release of a new dual, full-bridge PWM motor driver IC targeted at the office automation, automotive, industrial and consumer markets. Allegro's A4970 motor driver IC utilizes a DMOS output technology that drives both windings of a bipolar stepper motor or bidirectionally controls two DC motors. Both bridges are capable of sustaining 45 V and include internal pulse-width modulation (PWM) control of the output current to 750 mA.

For PWM current control, the maximum output current is determined by user selection of a reference voltage and sensing resistor. Two logic-level inputs select output current limits of 0%, 33%, 67%, or 100% of the maximum level. A PHASE input to each bridge determines load current direction.

The device is supplied in a 24-pin surface-mount wide SOIC with two pairs of batwing leads (LB). The webbed-pin construction provides for maximum package power dissipation in the smallest possible construction. The package is lead (Pb) free, with 100% matte tin leadframe plating. The A4970SLBTR-T is priced at $2.08 and the A4970GLBTR-T is priced at $2.29 - both prices are stated in quantities of 1,000.

Allegro MicroSystems, Inc. is a leader in developing, manufacturing and marketing high-performance semiconductors. Allegro's innovative solutions serve high-growth applications within the automotive market, with additional focus on office automation, industrial, and consumer/communications solutions. Allegro is headquartered in Worcester, Massachusetts (USA) with design, applications, and sales support centers located worldwide. Further information about Allegro can be found at www.allegromicro.com.

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