Stepper motor controllers - STMicroelectronics
L297STEPPER motor CONTROLLERSNORMAL/WAVE DRIVEHALF/FULL STEP MODESCLOCKWISE/ANTICLOCKWISE DIRECTIONSWITCHMODE LOAD CURRENT REGULA-TIONPROGRAMMABLE LOAD CURRENTFEW EXTERNAL COMPONENTSRESET INPUT & HOME OUTPUTENABLE INPUTDESCRIPTIONThe L297 Stepper motor Controller IC generatesfour phase drive signals for two phase bipolar andfour phase unipolar step motors in microcomputer-controlled applications. The motor can be driven inhalf step, normal and wawe drive modes and on-chip PWM chopper circuits permit switch-modecontrol of the current in the windings. A feature ofDecember 2001SymbolParameterValueUnitVsSupply voltage10VViInput signals7VPtotTotal power dissipation (Tamb = 70 C)1WTstg, TjStorage and junction temperature-40 to + 150 CABSOLUTE MAXIMUM RATINGSthis device is that it requires only clock, directionand mode input signals. Since the phase are gen-erated internally the burden on the microprocessor,and the programmer, is greatly reduced.
even-numbered state. ... Ground noise problems in multiple configurations can be avoided by synchronising the chopper os-cillators. This is done by connecting all the SYNC ... when the translator is at an odd numbered state (1, 3, 5 or 7). In this mode the INH1 and INH2 outputs remain high throughout. 5/11 L297.
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