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A3986SLDTR-T Datasheet(PDF) 1 Page - Allegro MicroSystems |
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A3986SLDTR-T Datasheet(HTML) 1 Page - Allegro MicroSystems |
1 / 16 page 3986-DS, Rev. 1 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 Dual Full-Bridge MOSFET Driver with Microstepping Translator Continued on the next page… Package: 38 pin TSSOP (suffix LD) Typical Application Diagram Approximate size A3986 Description The A3986 is a dual full-bridge gate driver with integrated microstepping translator suitable for driving a wide range of higherpowerindustrialbipolar2-phasesteppermotors(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. Motor stepping is controlled by a two-wire step and direction interface, providing complete microstepping control at full-, half-, quarter-, and sixteenth-step resolutions. The fixed-off time regulator has the ability to operate in slow-, mixed-, or fast-decay modes, which results in reduced audible motor noise, increased step accuracy, and reduced power dissipation. The translator is the key to the easy implementation of this IC. Simply inputting one pulse on the STEP input drives the motor one step (full, half, quarter, or sixteenth depending on the microstep select input).There are no phase-sequence tables, high frequency control lines, or complex interfaces to program. This reduces the need for a complex microcontroller. |
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Similar Description - A3986SLDTR-T |
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