L297
®
STEPPER MOTOR CONTROLLERS
NORMAL/WAVE DRIVE
HALF/FULL STEP MODES
CLOCKWISE/ANTICLOCKWISE DIRECTION
SWITCHMODE LOAD CURRENT REGULATION
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 microcomputercontrolled applications. The motor can be driven in
half step, normal and wawe drive modes and onchip PWM chopper circuits permit switch-mode
control of the current in the windings. A feature of
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 generated 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.
ABSOLUTE MAXIMUM RATINGS
Symbol
Value
Unit
Vs
Supply voltage
10
V
Vi
Input signals
7
V
Total power dissipation (Tamb = 70°C)
1
W
-40 to + 150
°C
Ptot
Tstg, Tj
Parameter
Storage and junction temperature
TWO PHASE BIPOLAR STEPPER MOTOR CONTROL CIRCUIT
December 2001
1/11
