L297 Datasheet, PDF (1/11 Pages) STMicroelectronics – STEPPER MOTOR CONTROLLERS

L297
L297D
STEPPER MOTOR CONTROLLERS
NORMAL/WAWE 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
DIP20
SO20
ORDERING NUMBERS : L297 (DIP20)
L297D (SO20)
DESCRIPTION
The L297/A/D Stepper Motor Controller IC gener-
ates four phase drive signals for two phase bipolar
and four phase unipolar step motors in microcom-
puter-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 this device is that it requires only clock,
direction and mode input signals. Since the phase
are generated internally the burden on the micro-
processor, 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
V_s
V_i
P_tot
T_stg, T_j
Parameter
Supply voltage
Input signals
Total power dissipation (T_amb = 70°C)
Storage and junction temperature
TWO PHASE BIPOLAR STEPPER MOTOR CONTROL CIRCUIT
Value
Unit
10
V
7
V
1
W
-40 to + 150
°C
August 1996
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