®
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
ABSOLUTE MAXIMUM RATINGS
Symbol
V
s
V
i
P
tot
T
stg
, T
j
Supply voltage
Input signals
Total power dissipation (T
amb
= 70
°
C)
Storage and junction temperature
Parameter
DIP20
SO20
ORDERING NUMBERS
: L297/1 (DIP20)
L297D (SO20)
this device is that it requires only clock, direction
and mode input signals. Since the phase are gen-
erated internallythe burdenon 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.
Value
10
7
1
-40 to + 150
Unit
V
V
W
°
C
TWO PHASE BIPOLAR STEPPER MOTOR CONTROL CIRCUIT
December 2001
1/11
ETC [ ETC ]
