UC3717A - Unitrode

UC3717A Stepper Motor Drive Circuit

The UC3717A is an improved version of the UC3717, used to switch drive the current in one winding of a bipolar stepper motor. The UC3717A has been modified to supply higher winding current, more reliable thermal protection, and improved efficiency by providing integrated bootstrap circuitry to lower recirculation saturation voltages. The diagram shown below .

Features

• Full-Step, Half-Step and Micro-Step Capability
• Bipolar Output Current up to 1A
• Wide Range of Motor Supply Voltage 10-46V
• Low Saturation Voltage with Integrated Bootstrap
• Built-In Fast Recovery Commutating Diodes
• Current Levels Selected in Steps or Varied Continuously
• Thermal Protection with Soft Intervention DESCRIPTION The UC3717A is an improved version of the UC3717, used to switch drive the current in one winding of a bipolar stepper motor. The UC3717A has been modified to supply higher winding current, more reliable thermal protection, and improved efficiency by providing in.