A5976

A5976 Microstepping DMOS Driver with Translator FEATURES AND BENEFITS ±2.8 A, 40 V output rating Low RDS(on) outputs, 0.22 Ω source, 0.15 Ω sink typical Automatic current decay mode detection/selection 3 to 5.5 V logic supply voltage range Mixed, fast, and slow current decay modes Fault output Mixed decay for both rising/falling step option Synchronous rectification for low power dissipation Internal UVLO and thermal shutdown circuitry Crossover-current protection Short-to-ground protection Short-to-VBB protection Shorted load protection Package: 28-lead TSSOP (suffix LP) with exposed thermal pad Not to scale DESCRIPTION The A5976 is a complete microstepping motor driver with built-in translator. It is designed to operate bipolar stepper motors in full-, half-, quarter-, and sixteenth-step modes, with output drive capability of 40 V and ±2.8 A. The A5976 includes a fixed off-time current regulator that has the ability to operate in slow-, fast-, or mixed-decay modes. This current-decay control scheme results in reduced audible motor noise, increased step accuracy, and reduced power dissipation. The translator is the key to the easy implementation of the A5976. Simply inputting one pulse on the STEP input drives the motor one step (two logic inputs determine if it is a full-, half-, quarter-, or sixteenth-step). There are no phase sequence tables, high-frequency control lines, or complex interfaces to program. The A5976 interface is an ideal fit for...