Publication date: 31 January 2012
The 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:http://www.allegromicro.com/en/Products/Motor-Driver-And-Interface-ICs/Bipolar-Stepper-Motor-Drivers/A4970.aspx
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
Allegro MicroSystems Europe, headquartered in Chertsey, United Kingdom, is the European sales and marketing operation, and operates a network of representatives and distributors throughout Europe. Allegro also has an engineering design centre in Edinburgh in Scotland and an application and marketing centre in Annecy in France.
