Datasheet for the Sanyo LB1845, a PWM current-controlled dual full-bridge driver for bipolar stepper motors found in printers, scanners and similar equipment. The 1.15 MB PDF includes pin assignments, current-setting reference and sense resistor details, logic truth tables and thermal limits. When a motor stalls or the driver overheats, the document helps you measure phase outputs, check the motor supply and reference voltage, and decide whether the IC or the motor windings have failed.
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