L293NE

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PMIC (Power Management Integrated Circuits) stands for Power Management Integrated Circuits and are the electronic building blocks within a circuit that control the flow of electrical current. They are crucial components in any electronic application and can be used to support a variety of different power management tasks. One such circuit is the L293NE, a dual H-bridge Motor Driver IC.

The L293NE is widely used in applications where two motors or brushes need to be driven simultaneously. It is commonly used to control stepper or servo motors in robotics projects, or to control the speed and direction of DC motors. It can also be used to control solenoids, relays, and other electronic loads.

The main advantage of the L293NE is its ability to handle high current signals with low power dissipation. This makes it an ideal choice for applications that require high current control with minimal energy loss. It also has built-in overcurrent and thermal protection features, which protect the device and the connected load against any damage due to excessive current.

The L293NE is designed to operate with a maximum supply voltage of up to 36 volts and can operate at speeds of up to 1 Mhz. It has two full H-bridges, each of which can provide up to 600mA of peak drive current and 1.2A of continuous drive current. In addition, it has five input pins, which can be used to control the direction and speed of the connected motors.

The working principle of the L293NE is quite simple. It is basically a dual H-bridge that can be used to control the speed and direction of two motors or brushes simultaneously. The speed and direction of each motor are controlled by the status of three input pins: Input 1, Input 2, and Enable. When Enable is low, both of the motors will be disabled, meaning that the voltage applied to the motor will be zero. When Enable is high, both of the motors will be enabled, and their speed and direction will be dependent on the status of Input 1 and Input 2.

If both of the inputs are low, the motors will move in one direction, while when both of them are high, they will move in the opposite direction. When one of the inputs is low, and the other is high, the motors will move in opposite directions, with the speed of the motor being dependent on the duty cycle of the PWM signal on the enable pin. This PWM signal can be used to change the speed of the connected motors by simply changing the duty cycle of the enable pin.

The L293NE also has a number of other features such as built-in overcurrent and thermal protection and programmable deadtime for motor synchronization. It also has an internal logic supply voltage regulator, which ensures that the logic part of the circuit will remain operational, even if the power supply to the rest of the circuit is lost.

Overall, the L293NE is a versatile and highly efficient motor driver IC that can be used in a variety of applications. It can handle large currents and speeds, while offering low power dissipation. Its built-in overcurrent and thermal protection features make it an ideal choice for applications that require robust power control.

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