![]() ![]() It can also be used as some devices, such as the driving circuit of stepper motor. Only in this way can a continuous current loop be formed. ULN2002A, ULN2003A, ULN2003AI ULQ2003A, ULN2004A ULQ2004A SLRS027Q DECEMBER 1976 REVISED JULY 2022 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. Because the ULN2003A is an open collector output, in order to make the diode play the role of continuous current, the COM pin (PIN9) must be connected to the power supply of the load. 4 Phase ULN2003 Stepper Motor Driver PCB The ULN2003 stepper motor driver PCB provides a direct drive interface between your microcontroller and stepper motor. ULN2003A is a 7-way inverter circuit, that is, when the input is high, the ULN2003A output is low, when the input is low, the ULN2003A output is high.
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