Motor driver

March 20, 2013
The A3918 is a full-bridge dc-motor driver capable of 1-A continuous
output and 2.5 to 9-V operating voltage

The A3918 is a full-bridge dc-motor driver capable of 1-A continuous output and 2.5 to 9-V operating voltage. An internal PWM current reference lets users select the peak chop current with a resistor only. The single supply and simple logic interface makes the driver suitable for single-cell Li-ion applications.

The driver uses a two-stage charge pump to ensure it has a low RDS (on) over the entire supply range from 9 down to 2.5 V. This dramatically improves battery life when voltages are low because switches do not become highly resistive due to reduced gate drive, resulting in more energy for the load and less heating and power dissipation in bridge. For overcurrent or locked rotor, an internal fixed off-time PWM timer sets a peak current with the addition of a current sense resistor. An overcurrent output flag notifies users when the current in the motor winding reaches the peak current.

Allegro MicroSystems
115 Northeast Cutoff
Worcester, MA 01606
(508) 853- 5000

© 2013 Penton Media, Inc.

Sponsored Recommendations

MOVI-C Unleashed: Your One-Stop Shop for Automation Tasks

April 17, 2024
Discover the versatility of SEW-EURODRIVE's MOVI-C modular automation system, designed to streamline motion control challenges across diverse applications.

The Power of Automation Made Easy

April 17, 2024
Automation Made Easy is more than a slogan; it signifies a shift towards smarter, more efficient operations where technology takes on the heavy lifting.

Lubricants: Unlocking Peak Performance in your Gearmotor

April 17, 2024
Understanding the role of lubricants, how to select them, and the importance of maintenance can significantly impact your gearmotor's performance and lifespan.

From concept to consumption: Optimizing success in food and beverage

April 9, 2024
Identifying opportunities and solutions for plant floor optimization has never been easier. Download our visual guide to quickly and efficiently pinpoint areas for operational...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!