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Description

The CS3717A controls and drives one phase of a bipolar stepper motor with chopper control of the phase current. Current levels may be selected in three steps by means of two logic inputs which select one of three current comparators. When both of these inputs are high the device is disabled. A separate logic input controls the direction of current flow. A monostable, programmed by an external RC network, sets the current decay time.

Features

■ Full/Half /Quarter Step Operation

■ Output Current Up to 1 A

■ Motor Supply Voltage 10V to 46V

■ Integrated Bootstrap Lowers Saturation Voltage

■ Built In Protection Diodes

■ Externally Selectable Current Level

■ Digital or Analog Control of Output Current Level

■ Thermal Overload Protection

■ Minimum External Components