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DMOS Microstepping Driver with Integrated Translator and Current Control
A4985
The A4985 offers precise and versatile microstepping motor control with an integrated translator, automatic current decay mode selection, and integrated current control for simplified design and optimized performance.
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Synchronous rectification for low power dissipation
Internal UVLO
Crossover-current protection
3.3 and 5 V compatible logic supply
Thin profile QFN and TSSOP packages
Thermal shutdown circuitry
Short-to-ground protection
Shorted load protection
Low current Sleep mode, <10 µA
No smoke no fire (NSNF) compliance (ET package)
The A4985 is supplied in three surface mount packages: two QFN packages, the 4 mm × 4 mm, 0.75 mm nominal overall height ES package, and the 5 mm × 5 mm × 0.90 mm ET package. The LP package is a 24-pin TSSOP. All three packages have exposed pads for enhanced thermal dissipation, and are lead (Pb) free (suffix –T), with 100% matte tin plated leadframes.