1, the main difference is that L298 can provide two-way current for the load. Suitable for driving 2 phase or 4 phase stepper motors, can also drive 2 ordinary brush DC motors. The drive current is 2A 2003 can only drive a 4-phase stepper motor. If it is used to drive a DC motor, it can only be rotated in one direction. commutationTo change the connection of the motor.
2, the difference in current, one is a double H bridge, one is a 7-way single-ended Darlington open circuit output.
3, as far as the stepper motor is concerned, ULN2003 only 500 MA current, you divide the voltage by the resistance of the stepper motor, roughly the required current, now it is best to use the chip drive, because there are a lot of protection measures in the chip, component consistency is good, L298N is 2A driver chip, It can drive ordinary motors and servo motors, and the current is larger, and it seems that those who make their own engraving machines or even CNC machine tools use this drive. <