Allegro's Fully integrated DMOS motor driver IC

The new A4950 from Allegro MicroSystems Europe is a fully integrated single full-bridge DMOS motor driver IC designed to drive DC brush motors with continuous output currents of up to 2.5 A. The new device incorporates two input terminals for controlling the speed and direction of a DC motor with externally applied PWM control signals. Internal synchronous rectification provides low power dissipation during PWM operation, while internal circuit protection features include over-current protection, motor lead short-to-ground or short-to-supply protection, thermal shutdown with hysteresis, under-voltage monitoring of load supply voltage, and crossover current protection. The internal PWM generator has an adjustable current limit which can be changed by the user using an external sense resistor. Integrated charge pump capacitors are also included to eliminate the need for external charge pump capacitors, reducing the pin count of the driver IC and minimising external component count and cost. The A4950 is primarily targeted at the office automation market, but it can also act as a good general-purpose brush DC motor driver for any commercial or industrial applications. It is provided in an 8L SOICN package with exposed thermal pad (Suffix LJ) for enhanced thermal dissipation. Please click here to download a copy of the data sheet: www.allegromicro.com/en/Products/Part_Numbers/4950/4950.pdf About Allegro Allegro MicroSystems, Inc. is a leader in developing, manufacturing and marketing high-performance power and Hall-effect sensor integrated circuits. Allegro's innovative solutions serve high-growth applications within the automotive, communications, computer/office automation, consumer and industrial markets. Allegro is headquartered in Worcester, Massachusetts (USA) with design and applications centres located in North and South America, Asia and Europe. 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. www.allegromicro.com