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The A4989 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.
▪ 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
▪ Enhanced low current control when microstepping
▪ Pin compatible with the A3986
| Attribute | Attribute Value |
|---|---|
| Manufacturer | Allegro MicroSystems |
| Product Category | Motor Drivers and Controllers |
| Series | - |
| Packaging | Alternate Packaging |
| Package-Case | 38-TFSOP (0.173", 4.40mm Width) |
| Technology | Power MOSFET |
| Operating-Temperature | -20°C ~ 85°C (TA) |
| Mounting-Type | Surface Mount |
| Function | Controller - Commutation, Direction Management |
| Applications | General Purpose |
| Interface | Step/Direction |
| Voltage-Supply | 3 V ~ 5.5 V |
| Supplier-Device-Package | 38-TSSOP |
| Current-Output | - |
| Output-Configuration | Pre-Driver - Half Bridge (4) |
| Voltage-Load | 12 V ~ 50 V |
| Motor-Type-Stepper | Bipolar |
| Motor-Type-AC-DC | - |
| Resolution | 1, 1/2, 1/4, 1/16 |
