Stepper Motor Control Circuits

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Stepper Motor Controller…. (24 Pins) LS7290, LS7290-S, LS7290-TS Last Update: 07/20/11 Controls Bipolar and Unipolar Stepper Motors Full, 1/2 step modes selection Direct interface to L298 for BiPolar motors Enable, Step, Direction and Reset control inputs PWM chopper circuit for step and torque control Two peak current sense comparators with external reference input Programmable interstep blanking delay 3 to 5.5 volt operation   Stepper Motor Controller…. (20 Pins; 20 Pins) LS8297, LS8297-S, LS8297-TS NEW! LS8297CT, LS8297CT-S, LS8297CT-TS Low cost, low current, pin-compatible replacement for L297. Torque Ripple Compensated half-steps – LS8297CT Controls two-phase Bipolar and four-phase Unipolar motors Interface to four AND Gates driving four N-Channel MOSFET's for Unipolar motors Normal/wave drive PWM chopper circuit for current control Two over current sense comparators with external references input All inputs and outputs TTL/CMOS compatible (TTL for 5V operation) Supply current < 400uA Supply voltage: 4.75 to 7V   Stepper Motor Controller…. (24 Pins) LS8397, LS8397-S, LS8397-TS NEW! Low cost, low current, pin-compatible replacement for L297. L297 operating modes with added functions: Selectable Torque Ripple Compensation MODE Selectable Holding Torque MODE   Other features same as LS8297