Note: Complete technical details can be found in the L298N Datasheet linked at the bottom of this page. Related Components: LM298 Motor Driver IC, 78M05 Voltage Regulator, Capacitors, Resistors, Heat Sink Supplies power for the switching logic circuitry inside L298N ICĪlternate Driver Modules: TMC2209, DRV8825, A4988, L9110S, DRV8711 Used to control the spinning direction of Motor B Used to control the spinning direction of Motor A L298N Module can control up to 4 DC motors, or 2 DC motors with directional and speed control. This module consists of an L298 motor driver IC and a 78M05 5V regulator. Similarly C2 would be better as a large value MLCC (although they are expensive), not an inductive filmĬ3 can be replaced by a 1uF capacitor, if it is necessary.This L298N Motor Driver Module is a high power motor driver module for driving DC and Stepper Motors. These chips switch large currents (upto amps) at rates measured in 100's of amps per microsecond, good decoupling and low stray inductance are important. The 10uF decoupling cap for the driver chip really needs to be ceramic, right up close to the chip - electrolytic isīasically not doing much useful decoupling at the speeds the chip switches, so that there will be more noise and spikes on the 12V supply than is necessary - ultimately this can cause the chip to fail as Vcc is sensitive to overvoltage. Spikes through it - then the shottky diode can be a much smaller physically (esp with surface mount). Its usually a good idea to add a 10 ohm or so resistance in series with the bootstrap diode to limit current It should beĬeramic multi-layer, not electrolytic or film. It would usually be sized at least 10 times larger than the MOSFET input capacitance, and at least 10 times smaller than the decoupling cap on the driver chip. It is designed in a way to reduce the noise and transient to help the stability of the device. The PCB layout of the schematic demonstrated in figure-2. You must inject your PWM pulse to the IN pin as well. Then you must apply a steady state logic level voltage to this pin to activate the chip. The SD pin has pulled down with a 4.7K resistor. If you are sure that your load voltage does not pass a threshold (for example a 12V DC motor), then you can decrease the voltages of the capacitors to 25V for instance and increase their capacitance values instead (for example 1000uF-25V). So I used 100V rated capacitors at least. The maximum tolerable MOSFETs voltage is 100V. The capacitors C1 and C2 are used to reduce the motor’s noise and EMI. That’s the reason why MOSFET drivers like IR2104 are useful. There is no problem with the high input capacitance of the IRFP150 MOSFETs. The IR2104 drives the MOSFETs 2 in a half-bridge configuration. The floating channel can be used to drive an N-channel power MOSFET or IGBT in the high side configuration which operates from 10 to 600 volts.” The output drivers feature a high pulse current buffer stage designed for minimum driver cross-conduction. The logic input is compatible with standard CMOS or LSTTL output, down to 3.3V logic. Proprietary HVIC and latch immune CMOS technologies enable ruggedized monolithic construction. Figure-1, The schematic diagram of the powerful DC motor driverĪccording to the IR2104 datasheet 1: ”The IR2104(S) are high voltage, high-speed power MOSFET and IGBT drivers with dependent high and low side referenced output channels.
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