In this way we can control the motor rotation using L298 chip.In ancient times people used to store their valuables and things in suitcases when they traveled from one place to another.
If both buttons are pressed or released simultaneously the MOTOR comes to stop immediately.
With that MOTOR rotates anti clock wise direction. If only Q2 is pressed, the current flows from OUT2 to OUT1. With that MOTOR rotates clock wise direction. So if only Q1 is pressed, the current flows from OUT1 to OUT2. If it’s pulled to ground the bridge-A will be disabled no matter the input control logic.Īfter all the circuit is setup we need to press the buttons Q1 and Q2 to change the flow of current between pins OUT1 and OUT2. The enable pin is pulled high through a resistor so bridge-A will be functioning all the time. The four diodes are FLYBACK diodes used for protecting the IC form inductive voltage spikes. These logic inputs are provided by Microcontroller or Microprocessor in application circuits. As shown in circuit we have two push buttons Q1 and Q2 which act as controls inputs for bridge-A. Here we are using one of H-BRIGES of l298 IC. The chip is preferred when control unit can only provide TTL outputsĪlso the chip does not need any additional components to be installed for operating.įor understanding the working of L298 IC, consider the simple circuit configuration shown below.
Where current control and PWM operable single chip device is needed.Ĥ. In the marked there are H-bridges like L293 which are used for low powered application while L298 is specially designed for high power applications.ģ. Where a high power motor driver is required. L298 is basically used where H- BRIDGE is required.Ģ. Here are few areas where L298 is preferred:ġ. Maximum current allowed to draw through each output: 3A.TTL Compatible Control Inputs of the Bridge B. The current that flows through the load connected between these two pins is monitored at pin 15. TTL Compatible Control Inputs of the Bridge A. The current that flows through the load connected between these two pins is monitored at pin 1. L298 is a 15-pin IC as shown in L298 pin diagram and function of each pin is described below.īetween this pin and ground is connected the sense resistor to control the current of the load. The emitters of the lower transistors of each bridge are connected together and the corresponding external terminal can be used for the connection of an external sensing resistor. Two enable inputs are provided to Enable or disable the device independently of the input signals. It is a high voltage, high current, dual full-bridge driver designed to accept standard TTL logic levels (Control Logic) and drive inductive loads such as relays, solenoids, DC and Stepper motors. L298 is a high power version of L293 motor driver IC.
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