## Tuesday, January 22, 2013

### Electronic Circuit DC Motor Driver using H-Bridge MOSFET IRF9540 and IRF540

Robometricschool. - One again that we can design DC motor driver using H-bridge MOSFET. In here we find term about H-Bridge. H-Bridge is a form of hardware network that serves to move the motor.  It is called H-Bridge because the schematic like a bridge that can arrange from MOSFET IRF9540 and IRF540.

Electronic Circuit of DC Motor Driver using MOSFET IRF9540 and IRF540

 Figure 1. DC Motor Driver using H-Bridge MOSFET IRF9540 and IRF540

Circuit Performance

According electronic schematic DC Motor Driver using MOSFET IRF9540 and IRF540 like in figure 1 above we know that this schematic using H-Bridge that arrange from two IRF9540 and two IRF540 with input using optocoupler PC123. To know configuration of PC123 you can see figure 2 bellow:

 Figure 2. PC123 configuration

IRF9540 is MOSFET channel P and IRF540 is MOSFET channel N that be used to control motor to rotate or not rotate. We can control motor rotate with follow:
1. Input A = 0 and Input B = 0, motor will not rotate because all MOSFET IRF9540 work and All MOSFET IRF540 not work.
2. Input A = 1 and Input B = 0, motor will rotate anti clock wise because all MOSFET IRF9540 Q2 and MOSFET IRF540 Q3 work, other MOSFET not work.
3. Input A = 0 and Input B = 1, motor will rotate clock wise because all MOSFET IRF9540 Q1 and MOSFET IRF540 Q4 work, other MOSFET not work.
4. Input A = 1 and Input B = 1, motor will not rotate because all MOSFET IRF540 work and All MOSFET IRF9540 not work.
Note:
• With this circuit schematic in figure 1, we get good security although we give same logical in input A and input B.
• We can get more power with change all MOSFET series according with current that allowed in MOSFET datasheet.

1. Hi, Thank you very much for the schema , it is very helpful.

I must say tath there is a conexion mising , from the motor to the junction of drains of the Mosfets, by making tath conexion , I've tested with motors and it works perfect , and it supports a lot of current ,

Gero

2. Thanks for mentioning it, I felt that something was not right. I am trying to design an h bridge to use as amplifier on a rfid system. Would you tell me which values of resistors did you use, as well as diodes? How much current you reckon it is capable to drain?