Ease H-Bridge on MOSFET IRF7105 transistors

I think I don’t have to explain what is H-Bridge circuit. Well it is mainly used to drive DC motors that they could be run forward and backwards. Circuit often used in robotics.

Usually there is a need to build small powerful and with good characteristics H-Bridge. One solution is to use IRF7105 p and n channel MOSFET pair coated in SO8 SMD case.

Mosfet_IRF7105.PNG

As you can see MOSFET’s have a good characteristics for driving direct current like maximum current is 3.5A for N and 2.3A for P channel. Main thin here is a voltage drop on transistors which depends on Rds resistance.

h-bridge1.gif

Controlling is very ease. You may use MCU or any manual switch to produce control levels on F1, F2, B1 and B2 wires:

  • F1=0, F2=1, B1=0 and B2=1 – motor turns forward;

  • F1=1, F2=0, B1=1 and B2=0 – motor turns backwards;

  • F1=1, F2=0, B1=0 and B2=1 – motor stop.

Source: www.ironfelix.ru

2 Comments:

  1. Dear i used this circuit but when i put the 5v to f1&b1 or f2&b2, always burn this ic please teach me what is the problem.
    Regard.

  2. Using motor 200ma only

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