MC3479 is designed to drive a two−phase stepper motor in the bipolar mode.
The MC3479 is a bipolar‑mode stepper motor driver designed for two‑phase stepper motors. It features single‑supply operation (7.2 V to 16.5 V), 350 mA per‑coil drive capability, and selectable full‑step/half‑step and clockwise/counter‑clockwise operation. The document includes detailed electrical characteristics, pin descriptions, and recommended operating conditions.
Application notes cover typical usage in disk drives and robotics, power‑dissipation calculations, and suggested external components such as clamp diodes and bias/set resistors. Package dimensions, ordering information, and contact details for ON Semiconductor support are also provided.
| Supply Voltage (V_M) | 7.2 V – 16.5 V |
|---|---|
| Coil Drive Current | 350 mA per coil |
| Logic Input Voltage (V_in) | 0.5 V – 7.0 V |
| Thermal Resistance (R_JA) | 45 °C/W (no heatsink) |
| Package Type | PDIP (plastic) |
The device operates from 7.2 V up to 16.5 V.
Each coil can be driven with up to 350 mA.
The junction temperature rating is +150 °C.