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UC3717ANG4 датащи(PDF) 1 Page - Texas Instruments |
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UC3717ANG4 датащи(HTML) 1 Page - Texas Instruments |
1 / 12 page 4/97 • 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 Stepper Motor Drive Circuit 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. The UC3717A is characterized for operation over the temperature range of 0°C to +70°C. UC3717A BLOCK DIAGRAM FEATURES DESCRIPTION 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 ABSOLUTE MAXIMUM RATINGS (Note 1) 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. 1 |
Аналогичный номер детали - UC3717ANG4 |
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Аналогичное описание - UC3717ANG4 |
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