A3986SLDTR-T

A3986SLDTR-T is a dual full-bridge gate driver with an integrated micro-stepping translator suitable for driving a wide range of higher-power industrial bipolar 2-phase stepper motors (typically 30 to 500W). Motor power is provided by external N-channel power MOSFETs at supply voltages from 12 to 50V. This device contains two sinusoidal DACs that generate the reference voltage for two separate fixed-off-time PWM current controllers. This provides current regulations for external power MOSFET full-bridges. Motor stepping is controlled by a two-wire step and direction interface, providing complete micro-stepping 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.

• 2-wire step and direction interface
• Dual full-bridge gate drive for N-channel MOSFETs
• Synchronous rectification, cross-conduction protection
• Adjustable mixed decay, integrated sinusoidal DAC current reference
• Load supply current is 10mA max at (ROSC = 10Kohm, CLOAD = 1000pF)
• Turn-On rise time is 120ns typical at (CLOAD = 1000 pF, 20% to 80%)
• Turn-On propagation delay is 180ns typical at (ENABLE low to gate drive on)
• Logic supply idle current is 300μA maximum at (RESET = 0)
• Ambient temperature range from 20 to 85°C
• 38-pin TSSOP package