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Part Number: UC3717A
Description: The UC3717A is an improved version of the UC3717, used to switchdrive the current in one winding of a ...
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UC3717A
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DataSheet
General Description
UC3717A General Description
The UC3717A is an improved version of the UC3717, used to switchdrive the current in one winding of a bipolar stepper motor. TheUC3717A has been modified to supply higher winding current, morereliable thermal protection, and improved efficiency by providing inte-grated bootstrap circuitry to lower recirculation saturation voltages.
The diagram shown below presents the building blocks of theUC3717A. Included are an LS-TTL compatible logic input, a currentsensor, a monostable, a thermal shutdown network, and an H-bridgeoutput stage. The output stage features built-in fast recovery com-mutating diodes and integrated bootstrap pull up. Two UC3717Asand a few external components form a complete control and driveunit for LS-TTL or micro-processor controlled stepper motor systems.
The UC3717A is characterized for operation over the temperaturerange of 0°C to +70°C.
UC3717A Maximum Ratings
Voltage
Logic Supply, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Output Supply, Vm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50V
Input Voltage
Logic Inputs (Pins 7, 8, 9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V
Analog Input (Pin 10). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCC
Reference Input (Pin 11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Input Current
Logic Inputs (Pins 7, 8, 9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -10mA
Analog Inputs (Pins 10, 11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . -10mA
Output Current (Pins 1, 15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1.2A
Junction Temperature, TJ. . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . +150°C
Storage Temperature Range, TS . . . . . . . . . . . . . . . . .. -55°C to +150°C
Logic Supply, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Output Supply, Vm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50V
Input Voltage
Logic Inputs (Pins 7, 8, 9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V
Analog Input (Pin 10). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCC
Reference Input (Pin 11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Input Current
Logic Inputs (Pins 7, 8, 9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -10mA
Analog Inputs (Pins 10, 11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . -10mA
Output Current (Pins 1, 15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1.2A
Junction Temperature, TJ. . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . +150°C
Storage Temperature Range, TS . . . . . . . . . . . . . . . . .. -55°C to +150°C
UC3717A Features
• Full-Step, Half-Step and Micro-StepCapability
• Bipolar Output Current up to 1A
• Wide Range of Motor Supply Voltage10-46V
• Low Saturation Voltage with IntegratedBootstrap
• Built-In Fast Recovery CommutatingDiodes
• Current Levels Selected in Steps or VariedContinuously
• Thermal Protection with Soft Intervention
• Bipolar Output Current up to 1A
• Wide Range of Motor Supply Voltage10-46V
• Low Saturation Voltage with IntegratedBootstrap
• Built-In Fast Recovery CommutatingDiodes
• Current Levels Selected in Steps or VariedContinuously
• Thermal Protection with Soft Intervention
UC3717A Connection Diagram
UC3717A
PDF/DataSheet Download
- Datasheet: UC3717A
- File Size: 465854 KB
- Manufacturer: TI [Texas Instruments]
- Click here to Download
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The UC3717 has been designed to control and drive the current in ne winding of a bipolar stepper motor. The circuit consists of an LSTTL- ompatible logic input, a current sensor, a monostable and an utput stage with built-in protection diodes. Two UC3717s an...
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