New Automotive Bipolar Stepper Motor Driver IC by Allegro MicroSystems, LLC

Single Supply Eliminates Need for External LDO

Allegro MicroSystems, LLC introduces a new automotive bipolar stepper motor driver IC or dual DC motor driver IC that is designed for pulse-width-modulated (PWM) control of low-voltage stepper motors and dual or single high current DC motors. Allegro’s AMT49702 is capable of output currents up to 1 A per channel and operating voltages from 3.5 to 15 V.  Key applications include Heads-up-Display (HUD) – mirror positioning and dust cover, Navigation – screen lift, Driver Attention Monitor – camera movement or focus, and Steering Wheel Feedback – vibration alert.

The AMT49702 is an automotive-grade device and is tested across extended temperature and voltage ranges to ensure compliance in automotive or industrial applications.  It has an internal fixed off-time PWM timer that sets a peak current based on the selection of a current sense resistor. An output fault flag is provided that notifies the user of a TSD or overcurrent protection event.

The AMT49702 is supplied in a low-profile 16-lead TSSOP (suffix “LP”) with exposed power tab for enhanced thermal dissipation. It is priced at $1.61 in quantities of 1,000.

Please click here to download a copy of AMT49702 Dual DMOS Full-Bridge Motor Driver data sheet.

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