UC3717 Datasheet

IC型號(hào)：
UC3717
PDF描述：
Stepper Motor Drive Circuit
文件大小：
517.68KB
PDF頁數(shù)：
9頁
芯片廠家：
TI

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UC1717

UC2717

UC3717

Stepper Motor Drive Circuit

FEATURES

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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

DESCRIPTION

The UC3717 has been designed to control and drive the current in

one winding of a bipolar stepper motor. The circuit consists of an LS-

TTL-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 LS-

TTL or micro-processor controlled stepper motor systems.

The UC1717 is characterized for operation over the full military tem-

perature range of -55擄C to +125擄C, the UC2717 is characterized for

-25擄C to +85擄C, and the UC3717 is characterized for 0擄C to +70擄C.

ABSOLUTE MAXIMUM RATINGS

(Note 1)

Voltage

Logic Supply, V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V

Output Supply, V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45V

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) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

鹵

Junction Temperature, T

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150擄C

Storage Temperature Range, T

. . . . . . . . . . . . . . . . . . -55擄C to +150擄C

Note 1: All voltages are with respect to ground, Pins

4,5, 12, 13. Pin numbers refer to DIL-16 package. Cur-

rents are positive into, negative out of the specified ter-

minal.

Note 2: Consult Packaging Section of Databook for in-

formation on thermal limitations and considerations of

package.

BLOCK DIAGRAM

7/95

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