Driving a motor in both directions is prerequisite for any robotics related application. Numerous motor drivers are available having varying current capacity. MOSfets are voltage driven and have very small Rds(on) making them better than any IC driven motor driver or drivers having transistors as their primary switching device.
Here is a schematic for a motor driver using H bridge which can supply current upto 20A.
Q1,Q4 are IRF4905 PMOS which have very low RDS(on).
Q2,Q3 are IRF3205 NMOS which have RDS(on) of just 8mohm.
The Transistors used here are BC547B
The PCB layout for the Motor driver is attached below.
IT is designed in ALTIUM Designer.
The actual board size is just 7.5mm by 5.5mm.
It is a working board and tested upto 20A current
Heatsink is a must while using it for high current applications.
Feel free to write comments if you have any doubts regarding this board, heat sink design calculations ,or any general thing.
Here is a schematic for a motor driver using H bridge which can supply current upto 20A.
Q1,Q4 are IRF4905 PMOS which have very low RDS(on).
Q2,Q3 are IRF3205 NMOS which have RDS(on) of just 8mohm.
The Transistors used here are BC547B
The PCB layout for the Motor driver is attached below.
IT is designed in ALTIUM Designer.
The actual board size is just 7.5mm by 5.5mm.
It is a working board and tested upto 20A current
Heatsink is a must while using it for high current applications.
Feel free to write comments if you have any doubts regarding this board, heat sink design calculations ,or any general thing.
