Allegro MicroSystems Inc. introduces an automotive version of its 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 free, with 100% matte tin lead-frame plating.
For more information, contact Allegro MicroSystems Inc., 115 Northeast Cutoff, Worcester, MA 01606. Phone: (508) 853-5000.