Page 31 - CNC Robotics

CNC Robotics

L297
L297D

STEPPER MOTOR CONTROLLERS

• NORMALIWAWE DRIVE
• HALF/FULL STEP MODES • -
• CLOCKWISEJANTICLOCKWISEDIRECTION --
• SW ITCHMODE LOAD CURRENT REGULA- ~
TION
• PROGRAMMABLE LOAD CURRENT
OlP20 5020
• FEW EXTE RNAL COMPONENTS
• RESET INPUT & HOM E OUTPUT ORDERING NUMBERS : L297 (OIP20)
L2970 (5020)
• ENABLE INPUT
DESCRIPTION feature of this device is that it requires only clock,
The l297/A/O Stepper Motor Controller Ie gene r- direction and mode input signals.Since the phase
ates four phase drive signals for twophase bipolar are generated internally the burden on the micro-
and four phase unipolar step motors in microcom- processor.andthe programmer,is greatlyreduced.
puter-conlrolled applications. The motor can be Mounted in DIP20 and 8020 packages,the l297
driven in half step, normal and wawe drive modes can be used with monolithic bridge drives such as
and on-chip PWM chopper circuits permit switch- the L298N or L293 E, or with discrete transistors
mode control of the current in the windings. A and darlingtons.

AB SOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V. Supply voltage 10 V
V; Input signals 7 , V
P~ Total power dissipation (T"mt>- 70"C) W
T Itg . T i Storage and junction temperature -40 to+ 150 "C
TW O PHAS E BIPOLA R STEPPER MOTOR CONTROL CIRCUIT

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!."OO... Ie l l91 , 0

August 1996 1/1 1

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