A3986SLD Datasheet PDF - Allegro MicroSystems

●Description

●The A3986 is a dual full-bridge gate driver with integrated microstepping translator suitable for driving a wide range of higher power industrial bipolar 2-phase stepper motors (typically 30 to 500 W). Motor power is provided by external N-channel power MOSFETs at supply voltages from 12 to 50 V.

●This device contains two sinusoidal DACs that generate the reference voltage for two separate fixed-off-time PWM current controllers. These provide current regulation for external power MOSFET full-bridges.

●Features and Benefits

●▪ 2-wire step and direction interface

●▪ Dual full-bridge gate drive for N-channel MOSFETs

●▪ Operation over 12 to 50 V supply voltage range

●▪ Synchronous rectification

●▪ Cross-conduction protection

●▪ Adjustable mixed decay

●▪ Integrated sinusoidal DAC current reference

●▪ Fixed off-time PWM current control