Stepper Motor Drive Circuit - UC3717A

UC3717A (ACTIVE)

Stepper Motor Drive Circuit

 

Recommended alternative parts

  • DRV8829  -  The DRV8829 provides better efficiency and a smaller package

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 integrated bootstrap circuitry to lower recirculation saturation voltages. The diagram shown below presents the building blocks of the UC3717A. Included are an LS-TTL compatible logic input, a current sensor, a monostable, a thermal shutdown network, and an H-bridge output stage. The output stage features built-in fast recovery commutating diodes and integrated bootstrap pull up. Two UC3717As and a few external components form a complete control and drive unit for LS-TTL or micro-processor controlled stepper motor systems.

The UC3717A is characterized for operation over the temperature range of 0°C to +70°C.

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

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Parametrics Compare all products in Motion/Motor Control

 
Operating Supply (Min) (V)
Operating Supply (Max) (V)
Operating Supply Current (mA)
Peak Output Current (A)
Special Features
Rating
Operating Temperature Range (C)
Pin/Package
UC3717A
10   
46   
7   
1   
Current-Limited
Output Clamp Diodes
Stepper Motor Controllers
Switching Control
Thermal Shutdown   
Catalog   
0 to 70   
16PDIP