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.
8 INH2 Active low inhibit control for drive stages of C and D phases. Same functions as INH1. 9 D Motor phase D drive signal for power stage. 10 ENABLE Chip enable input. When low (inactive) INH1, INH2, A, B, C and D are brought low. 11 CONTROL Control input that defines action of chopper. When low chopper acts on INH1 and INH2; when high chopper
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