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Stepper motor driver reduces board space, improves thermal efficiency

Posted: 27 Apr 2012 ?? ?Print Version ?Bookmark and Share

Keywords:Texas Instruments? stepper motor driver? DRV8818?

Texas Instruments Inc. (TI) has introduced a 2.5A stepper motor driver that runs up to 30-percent cooler. The DRV8818 features low RDS(ON) to improve thermal efficiency, reducing board and ambient temperature rises. The device improves system reliability and efficiency while maintaining high motor performance in industrial, medical and consumer applications, such as textile manufacturing, pumps, light industrial automation and printers.

Key features of the DRV8818
???Typical RDS(ON) of 150 milliohms, low-side, and 220 milliohms, high-side, improves efficiency and reduces ambient and board temperatures for improved system reliability

???Flexible decay modes and timing parameters reduce audible noise and vibrations to improve system stability and performance

???Integrated indexer simplifies current regulation, enabling full, half, quarter and one-eighth microstepping, for a smoother motion profile

???Advanced on-chip protection, including overcurrent, overtemperature, shoot-through and undervoltage lock-out increases system reliability and manufacturing yields

???Compatible with the existing 1.9A DRV8811 for lower-current systems, enabling current scalability with a single common design

The DRV8818 motor driver is now available in a 10x6mm HTSSOP package for $2.25 in 1,000-unit quantities. The DRV8818EVM evaluation module is likewise on offer for $99.

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