The data sheet introduces the A3966SA and A3966SLB dual full-bridge PWM motor drivers. These two chips can drive both windings of a two-phase bipolar stepper motor. The internal fixed-frequency, pulse-width modulated (PWM) current-control circuitry can control motor winding current.
The A3966SLB is a dual full‑bridge PWM motor driver designed to drive both windings of a two‑phase bipolar stepper motor. It features two H‑bridges capable of up to +650 mA continuous output current and 30 V output voltage, with internal fixed‑frequency PWM current control and Satlington sink drivers for low saturation voltage.
The document includes absolute maximum ratings, electrical characteristics, functional block diagrams, typical application circuits, and mechanical dimensions for the 16‑lead SOIC package. It also details protection features such as thermal shutdown, ground‑clamp diodes, and UVLO protection.
| Continuous Output Current | +650 mA |
|---|---|
| Output Voltage Rating | 30 V |
| Logic Supply Voltage Range | 4.75 V to 5.5 V |
| Input Voltage Range | -0.3 V to Vdd + 0.3 V |
| Package Power Dissipation (A3966SLB) | 1.87 W |
| Maximum Junction Temperature | 150 °C |
| Thermal Shutdown Temperature | 165 °C |
The device can deliver a continuous output current of up to +650 mA.
The driver is rated for a maximum output voltage of 30 V.
The logic supply voltage must be between 4.75 V and 5.5 V.