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Ease H-Bridge on MOSFET IRF7105 transistors

2016-05-09 02:34  
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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 a€“ motor turns forward;

F1=1, F2=0, B1=1 and B2=0 a€“ motor turns backwards;

F1=1, F2=0, B1=0 and B2=1 a€“ motor stop.

Source: www.ironfelix.ru


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