1, the L298N chip is equipped with dual H-bridge motor drivers, each H-bridge can provide 2A current, the power supply voltage range of the power supply part is 5-48v, the logic part is 5v power supply, and accepts 5vTTL level. Under normal circumstances, the voltage of the power supply part should be greater than 6V, otherwise the chip may not work properly.
2, H20PR5 power tube parameters H20PR5 powerThe parameters of the tube are important indicators to describe the performance of the tube, usually including the maximum voltage (Vmax), the maximum current (Imax) and the maximum power (Pmax). These parameters are provided by the manufacturer and are detailed in the data book.
3, for the H-bridge carrier distribution circuit, the switching frequency is required to reach 5MHz, and the output voltage RMS value is 50V. The performance of ordinary SiMOS tube can not meet the requirements.
4, AH8691. According to the inquiry love procurement that: electric vehicle instrument chip is lcd driver chip, model is AH8691, can be inputVoltage range from 10 V to 100 V step-down conversion to a stable 5 V output voltage.
5, v 3A motor, the starting current must exceed the ss8550 can withstand the current, you can use TIP31 and TIP32 tube instead of try, medium power mosfet tube can be.
6, including input voltage, load resistance, duty cycle, etc. In the H-bridge DC chopper circuit, when the input voltage is V and the duty cycle is D (0D1), the output voltage can be expressed as V×D. For example, when the input voltage is 12V and the duty cycle is 0.5, the output voltage is 6VWhat
The ULN2003 is connected to 5V voltage, while the L298N can be connected to 12v, which means that it has a stronger drive capacity. And L298N has overcurrent protection function, when the motor is stuck, it can protect the circuit and the motor.
ULN2003 can only drive small probability stepper motor, and is unipolar control, L298 is bipolar control.
The main difference is that the L298 can provide a bidirectional current to the load. Suitable for driving 2 phase or 4 phase stepper motors, can also drive 2 ordinary brush DC motors. The driving current is2A 2003 can only drive 4-phase stepper motors. If it is used to drive a DC motor, it can only be rotated in one direction. Reversing changes the connection of the motor.
uln2003 is a seven-fold Darlington array, and uln2803 is an eight-fold Darlington array. The input voltage range of the two chips is the same, and the output voltage and current are the same. The latter goes all the way.
The difference between the l293d motor drive module and l298n is: the chip is different, the output current is different, and the optocoupler is different. Chip different l293d motor drive module: The chip of the l293d motor drive module is stepperThe drive chip.
MCU cycle parallel output some values, driven by a certain beat.) The commonly used small stepper motor can be driven by uln2003, while the working current of the DC motor is much larger, the general small DC motor is driven by a special driver chip such as l298n, and the control is generally controlled by a single chip microcomputer output pwm wave.
Absolutely, the main feature of L298NThe point is: high working voltage, the highest working voltage up to 46V; The output current is large, the instantaneous peak current can reach 3A, and the continuous working current is 2A; Rated power 25W.
L298N drive module with high voltage, high current output capability, can directly drive the motor, but also through the PWM signal to control the speed of the motor. In the L298N drive module, the voltage polarity of the output can be controlled by changing the logic level of the input, so as to change the running direction of the motor.
Equivalent to the L298N can drive two DC motors or one stepper motor.The role of the optocoupler is to isolate the signal, so that once there is a problem on the L298N side, it will not immediately feedback to the MCU and burn the MCU.
L298 motor drive module generally can only drive a small current DC motor, if the circuit diagram is connected correctly should also be able to drive. Together I made a drive module with the diode is IN5819, the optocoupler is TLP521-4, you change to see if it can work.
1, the difference between the l293d motor drive module and l298n is: the chip is different, the output current is different, and the optocoupler is different. Chip Different l293d motor drive module: The chip of the l293d motor drive module is a stepper motor drive chip.
2, the main body is different l293d: support Vcc 5~36V micro motor drive integrated circuit chip. l298n: is a double H-bridge motor driver chip. Supports different current l293d: supports Vcc 5~36V, the maximum output current is 1A.
3, L293D each channel peak output current up to 2A L298N operating voltage 8-46V output current 2A Do not know what you want to drive? If you have two 130 motors, you can use the L293D.
4, the motor current is continuous, low speed performance is good, less harmonics, high steady-state accuracy, small pulsation, loss and heating are small, wide speed range, wide frequency band of the speed control system, good fast response, dynamic immunity.
5, the logic function of the motor drive module L298N is to control the operation of the motor by controlling the logic level of the inputTurn direction and speed. The L298N Motor driver module is an integrated circuit commonly used to drive DC motors and stepper motors.
Core components of the drive circuit First, the power input line provides a stable and rated voltage to the motor, and is tightly connected to a specially designed drive board. The control signal line delivers the PWM (pulse width modulation) signal generated by the microcontroller, which is the director of the motor speed and direction adjustment.
Detailed design stepsWe present a practical case of constructing drive circuits with 240 series and 32 four-way and non-gates to achieve a parallel design of two H Bridges. The inverter uses CMOS output to drive the NFET on the lower side, ensuring smooth operation at 5V voltage.
The magic of PWM signals: high levels drive current flow, low levels form a self-inductive electromotive force loop, like the rhythm of music, precisely control the rhythm of the motor. In the hardware design, STM32 skillfully directs the construction of the H-bridge, and the upper bridge arm requires additional boost drive, and the bootstrap circuit becomes the key.
2, the power of the H-bridge The essence of the H-bridge drive is the clever layout of four switches (bridge arms), which precisely control the positive and negative rotation of the motor to prevent the risk of short circuit. By adjusting the MOS tube (metal oxide semiconductor field effect tube) state, you canAchieve precise switching of the motor to ensure that the motor operates within a safe current range.
3, H bridge usually needs two synchronous positive and negative signals to drive the following figure, you can make DC motor stop, forward turn, reverse three actions, of course, A B input signal can also be replaced by a single signal, but the action is only two.
4, the driver chip L298 is a special chip to drive the two-phase and four-phase stepper motor, we use its internal bridge circuit to drive the DC motor, this method has a series of advantages.