Automotive Bipolar Stepper Motor or Dual DC Motor Driver IC
Allegro MicroSystems, LLC has introduced a new automotive bipolar stepper motor driver IC or dual dc motor driver IC that is designed for pulse-width-modulated control of low-voltage stepper motors and dual or single high-current dc motors. Allegro’s AMT49702 is capable of output currents up to 1A per channel and operating voltages from 3.5- to 15-Vdc.
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.
