Full-Bridge Motor Driver IC enhances automotive HVAC systems.
August 13, 2012 -
Available for automotive HVAC systems, A4950 is designed for PWM control of DC motors and comes in 8-pin SOICN package with exposed thermal pad. Logic interface is available to control speed and direction of DC motor with externally applied PWM control signals, while internal synchronous rectification control circuitry lowers power dissipation during PWM operation. Along with internal circuit protection, IC offers peak output currents to ±3.5 A and operating voltages to 40 V.
|Original Press release |
Allegro MicroSystems Inc.
115 N.E. Cutoff, P.O. Box 15036
Worcester, MA, 01615
Allegro MicroSystems, Inc. Introduces a New Full-Bridge DMOS PWM Motor Driver IC
Extended Temperature Version Now Available for Automotive HVAC Systems
Worcester, MA - Allegro MicroSystems, Inc. introduces an automotive version of their existing A4950 full-bridge motor driver IC. Allegro's A4950 was designed for pulse width modulated (PWM) control of DC motors and is now capable of peak output currents to ±3.5 A and operating voltages to 40 V. These design updates were implemented to accommodate high ambient operating temperature applications within the automotive market. The new device is tested across extended temperature and voltage ranges to ensure compliance in both automotive and industrial applications.
Simple logic interface is available to control the speed and direction of a DC motor with externally applied PWM control signals. Internal synchronous rectification control circuitry is provided to lower power dissipation during PWM operation. Internal circuit protection includes overcurrent protection, motor lead short to ground or supply, thermal shutdown with hysteresis, undervoltage monitoring of VBB, and crossover current protection.
The A4950 is provided in a low-profile 8-pin SOICN package with exposed thermal pad (suffix LJ) that is lead (Pb) free, with 100% matte tin leadframe plating. It is priced at $1.70 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.