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he new A4970 from Allegro MicroSystems Europe is a dual, full-bridge PWM motor driver IC featuring the latest DMOS technology to provide a significant reduction in quiescent and switching power losses. The new device incorporates a DMOS output stage 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 A4970 is targeted at the office automation, automotive, industrial and consumer markets. The device is supplied in a 24-pin surface-mount wide SOIC package with two pairs of bat-wing leads. The webbed-pin construction provides for maximum package power dissipation in the smallest possible construction. The package is lead (Pb) free, with 100% matt tin lead-frame plating. Please click here to download a copy of the data sheet: www.allegromicro.com/en/Products/Motor-Driver-And-Interface-ICs/Bipolar-Stepper-Motor-Drivers/A4970.aspx About Allegro 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
