L298N is a high-voltage and high-current motor driver chip produced by ST Company. This chip adopts a 15-pin package. The main features are: high working voltage, with the maximum working voltage reaching up to 46V; The output current is large, with an instantaneous peak current of up to 3A and a continuous working current of 2A. Rated power: 25W. A high-voltage and high-current full-bridge driver with two H-bridges inside can be used to drive DC motors, stepper motors, relay coils and other inductive loads. Controlled by standard logic level signals; It has two enable control terminals, allowing or prohibiting the device from working without being affected by the input signal. There is also a logic power input terminal, enabling the internal logic circuit section to operate at a low voltage. An external detection resistor can be connected to feed back the variation to the control circuit. The L298N chip is used to drive the motor, which can drive a two-phase stepper motor or a four-phase stepper motor, or two DC motors.
Instructions for Use/Precautions
Matters:
When your drive voltage (marked as 12V input in the above figure, the actual acceptable input range is 7-12V) is 7V
When it is -12V, the on-board 5V logic power supply can be enabled. After using the on-board 5V power supply, +5V in the interface
The power supply does not require input voltage, but a 5V voltage can be led out for external use. This is the regular application!
2. When the driving voltage is higher than 12V and less than or equal to 24V (the chip manual states that it can support up to 35V, but according to the economy.
It's already remarkable that the maximum voltage support for a conservative application of 298 is up to 24V! When, for example, the rated voltage to be driven is
An 18V motor. First, the jumper cap that enables the on-board 5V output must be removed. Then connect 5V externally to the 5V output port
A 5V enable is a control signal with a level of 5V. When this signal input is valid and the power supply in the motor drive module is normal, the motor drive module outputs current. Otherwise, even if the power supply is normal, there will be no current on the motor.
The voltage supplies power to the internal logic circuits of the L298N. This is an unconventional application driven by high voltage!
