It is used for on-board 5V power supply. If you remove the jumper cap, you need to input 5V voltage through the external power supply on the 5V output interface to supply power to the L298N driver version. Usually in order to avoid damage to the voltage regulator chip, when the input drive voltage is greater than 12V, unplug the jumper cap, you need to use other power input 5V voltage to supply power to the driver board. Extended data: L298N chip can drive two two-phase motors, can also drive a four-phase motor, the output voltage up to 50V, can be directly through the power supply to adjust the output voltage; The signal can be provided directly by the IO port of the single chip computer. And the circuit is simple, easy to use.
The L298N can accept the standard TTL logic level signal VSS, VSS can be connected to 4.5 ~ 7V voltage. 4-pin VS is connected to the power supply voltage, and the VS voltage range VIH is + 2.5 ~ 46V. The output current can reach 2A, which can drive inductive load. The emitters of the 1 pin and 15 foot tubes are separately drawn out to access the current sampling resistance and form the current sensing signal.
The LM298N is a dual full-bridge DC motor driver chip, which is commonly used to drive DC motors and stepper motors. It provides a high current output and is suitable for high-power motor drives.