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SLUS369 PDF预览

SLUS369

更新时间: 2024-10-29 12:27:39
品牌 Logo 应用领域
德州仪器 - TI 电机驱动
页数 文件大小 规格书
12页 648K
描述
Stepper Motor Drive Circuit

SLUS369 数据手册

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UC3717A  
Stepper Motor Drive Circuit  
FEATURES  
DESCRIPTION  
Full-Step, Half-Step and Micro-Step  
Capability  
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 inte-  
grated 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 com-  
mutating 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.  
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  
The UC3717A is characterized for operation over the temperature  
range of 0°C to +70°C.  
Thermal Protection with Soft Intervention  
ABSOLUTE MAXIMUM RATINGS (Note 1)  
Voltage  
Logic Supply, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V  
Output Supply, Vm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50V  
Input Voltage  
Note 1: All voltages are with respect to ground, Pins 4,  
5, 12, 13. Currents are positive into, negative out of the  
specified terminal. Pin numbers refer to DIL-16 pack-  
age.  
Consult Packaging Section of Databook for thermal limi-  
tations and considerations of package.  
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  
BLOCK DIAGRAM  
4/97  
1

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