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L297

STEPPER MOTOR CONTROLLERS

NORMAL/WAVE DRIVE

HALF/FULL STEP MODES

CLOCKWISE/ANTICLOCKWISE DIRECTION

SWITCHMODE LOAD CURRENT REGULA-

TION

PROGRAMMABLE LOAD CURRENT

FEW EXTERNAL COMPONENTS

RESET INPUT & HOME OUTPUT

ENABLE INPUT

DESCRIPTION

The L297 Stepper Motor Controller IC generates

four phase drive signals for two phase bipolar and

four phase unipolar step motors in microcomputer-

controlled applications. The motor can be driven in

half step, normal and wawe drive modes and on-

chip PWM chopper circuits permit switch-mode

control of the current in the windings. A feature of

December 2001

Symbol

Parameter

Value

Unit

Supply voltage

10

V

Input signals

7V

°C)

1W

Storage and junction temperature

-40 to + 150

°C

ABSOLUTE MAXIMUM RATINGS

this device is that it requires only clock, direction

and mode input signals. Since the phase are gen-

erated internally the burden on the microprocessor,

and the programmer, is greatly reduced. Mounted

in DIP20 and SO20 packages, the L297 can be

used with monolithic bridge drives such as the

L298N or L293E, or with discrete transistors and

darlingtons.

TWO PHASE BIPOLAR STEPPER MOTOR CONTROL CIRCUIT

DIP20

SO20

ORDERING NUMBERS : L297/1 (DIP20)

L297D (SO20)

1/11