描述 Description

The A4982 is a complete microstepping motor driver with built-in translator for easy operation. It is designed to operate bipolar stepper motors in full-, half-, quarter-, and sixteenth-step modes, with an output drive capacity of up to 35 V and ±2 A. The A4982 includes a fixed off-time current regulator which has the ability to operate in Slow or Mixed decay modes.

The ET package meets customer requirements for no smoke no fire (NSNF) designs by adding no-connect pins between critical output, sense, and supply pins. So, in the case of a pin-to-adjacent-pin short, the device does not cause smoke or fire. Additionally, the device does not cause smoke or fire when any pin is shorted to ground or left open.

Features and Benefits

? Low R

DS(ON) outputs

? Automatic current decay mode detection/selection

? Mixed and Slow current decay modes

? 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)