PCB layout of the H-Bridge DC motor driverįigure 4 shows the 3D views of the PCB board from the top and bottom.ģD views from the top and bottom of the board It is a 2 layers PCB board and all component packages are through-hole. K1 is a KF45 power connector that is used to connect the motor and motor’s supply wires to the board.įigure 3 shows the PCB layout of the H-Bridge DC motor driver. P1 is a 5 pins XH connector that is used to apply the chips’ supply and control signals to the board. C2, C8, D1, and D10 are selected according to the datasheet and the application requirements. Internal reverse Shotkey diodes have been embedded in the MOSFETs, however, using these external Shotkey diodes reduce the stress on the internal diodes as well. The 1N4148 diode discharges the gate’s capacitor.ĭ4, D5, D6, and D7 are used to suppress the DC motor’s reverse current spikes. Don’t forget that a MOSFET introduces a capacitance on their gate pin. R1 and D2, R2 and D3, R3 and D8, R4 and D9 have been used to damp down the ringing and parasitics that might be introduced by the inductors and capacitors at the ON/OFF times of the MOSFETs. Wiring diagram of the IR2104 MOSFET driver chipĬ1, C3, C4, C5, C6, C7, and C9 have been used to reduce the noise. As it is clear, the supply of the chip and load (motor) does not need to be identical, however, both supplies share a common ground. Figure 2 shows the basic wiring diagram of the chip. The good news about the IR2104 is that this chip is compatible with both 3.3V and 5V logic levels. 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.”.
Full bridge mosfet driver 5v drivers#
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.
According to the IR2104 datasheet: “The IR2104(S) are high voltage, high-speed power MOSFET and IGBT drivers with dependent high and low side referenced output channels. I’ve selected two IR2104 to drive the MOSFETs. The low thermal resistance and low package cost of the TO-220 contribute to its wide acceptance throughout the industry.” The TO-220 package is universally preferred for all commercial-industrial applications at power dissipation levels to approximately 50 watts. This benefit, combined with the fast switching speed and ruggedized device design that HEXFET power MOSFETs are well known for, provides the designer with an extremely efficient and reliable device for use in a wide variety of applications. According to the IRF3205 datasheet: ”Advanced HEXFET? Power MOSFETs from International Rectifier utilize advanced processing techniques to achieve extremely low on-resistance per silicon area. This MOSFET offers nice characteristics that are essential for this application, very low RDSon resistance, and high current handling capability. I’ve selected 4 IR3205 to do the switching. Schematic diagram of the H-Bridge DC motor driver As it is clear, the heart of the circuit is two IR2104 MOSFET driver chips. Theoretically, the above-mentioned MOSFET can handle currents up to 80A, however, in practice we can expect to get currents up to 40A if the MOSFET temp[erature is kept as low as possible, using a big heatsink or even a fan.įigure 1 shows the schematic diagram of the H-Bridge DC motor driver. In this article/video, I have introduced a complete H-Bridge DC motor driver using four IR3205 power MOSFETs and two IR2104 MOSFET drivers. The main advantages of using an H-Bridge driver are: high efficiency, rotation direction change, and braking the motor. An H-Bridge (Full-Bridge) driver is quite popular in driving loads such as brushed DC motors and it is widely used in robotics and industry.
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