The A3901 is a dual full-bridge motor driver, designed for low voltage portable applications involving bipolar stepper or brush DC motors. The outputs have been optimized for low voltage drop, with currents up to ±400 mA (±800 mA with outputs paralleled) and an operating voltage range of 2.5 to 5.5 V.
The four inputs (IN1 to IN4) can control a bipolar stepper motor in full- or half-step mode, or DC motors in forward, reverse, or brake mode. The inputs can be PWMed for current or speed control at frequencies up to 250 kHz.
The A3901 is designed for portable applications with a power-off (Sleep mode) current of 50 nA typical.
Internal protection circuitry includes thermal shut down (TSD) and crossover (shoot-through) protection.
The A3901 is supplied in a 3 mm × 3 mm × 0.75 mm nominal height, 10‑lead DFN package, with exposed thermal pad (package “EJ”)
FEATURES AND BENEFITS
Low RDS(on) outputs
Full- and half-stepping capability
Small package
Forward, reverse, and brake modes for DC motors
Sleep mode with 50 nA current drain typical
PWM control up to 250 kHz
Crossover-current protection
Thermal shutdown (TSD)
| Manufacturer | Allegro MicroSystems |
|---|---|
| Category | Motor Control |
| Eval Board Part Number | 620-1565-ND |
| Eval Board Supplier | Allegro MicroSystems |
| Eval Board |
Normally In Stock
|
| Voltage In |
2.5 ~ 5.5 V
|
| Number of Motors and Type |
2, DC Brush Motors
1, Stepper Motor, BiPolar |
| Power / Current Out |
400 mA
400 mA x2 (800 mA x1) 800 mA |
| Features |
Brake Function
Shoot-Through Protection (Overlap) Shutdown, Enable, Standby Thermal Protection |
| Component Count + Extras |
2 + 0
|
| Application / Target Market |
3D Printer
|
| Design Author |
Allegro Microsystems
|
| Main I.C. Base Part |
A3901
|
| Date Created By Author | |
| Date Added To Library | 2023-02 |
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