L298 is a dedicated driver IC can drive inductive loads, such as: high-power "220V AC Cooling Fan" and stepper motors, can drive 46V, 2A below the motor. Its input can be connected directly to the microcontroller, and can achieve "220V AC Cooling Fan" of forward, reverse, acceleration and deceleration control. L298 has two power supplies, respectively, logic supply and power supply, 6V power supply for logic. 12V for power supply.