UC3717N

步进电机驱动电路 Stepper Motor Drive Circuit

DESCRIPON

The UC3717 has been designed to control and drive the current in one winding of a bipolar stepper motor. The circuit consists of an LSTTL-compatible logic input, a current sensor, a monostable and an output stage with built-in protection diodes. Two UC3717s and a few external components form a complete control and drive unit for LSTTL or micro-processor controlled stepper motor systems.

The UC1717 is characterized for operation over the full military temperature range of -55°C to +125°C, the UC2717 is characterized for -25°C to +85°C, and the UC3717 is characterized for 0°C to +70°C.

FEATURES

• Half-step and Full-step Capability

• Bipolar Constant Current Motor Drive

• Built-in Fast Recovery Schottky Commutating Diodes

• Wide Range of Current Control 5-1000mA

• Wide Voltage Range 10-45V

• Designed for Unregulated Motor Supply Voltage

• Current Levels can be Selected in Steps or Varied Continuously

• Thermal Overload Protection