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Gulrajas This is probably the biggest factor in determining if you can use the internal diode or not. The integral body diode sees a current spike once per hour that lasts probably 1ms or maybe even 10ms, but after that it has almost 60 minutes to cool back down.
Some good simulations might tell what is best to do with a given application, and some prototype measurements would also help. Potentiometer Questions Started by norbss Yesterday at I have doubts that it is a more practical way of doing with npn and pnp combo I also need to know where to place the flyback diode please. Right on the motor if you can. Place the freewheel diode as close to the motor as possible. To participate you need to register. IRF Datasheet I blame lack of coffee.
Read these app notes from International Rectifier and Fairchild about mosfets You must log in or register to reply here. They are incredibly enlightening. By freewheel diode, do you mean fly back diode? Read the app notes. Thread starter breadboardguy Start date Jul 22, The problem is that vatasheet geometry is involved and i dont have very advanced notions i am 14 after all and This means that the transistor using datassheet internal diode has to dissipate an extra amount of power, not only while the thing is in conduction, but also when the diode is in conduction, which increases the total power dissipation of that one little package even if the forward voltage of the internal diode wasnt higher than normal.
As a quick example of an application that does not require an extra diode, consider a relay driver where the relay turns on and off once per hour. Adding an extra diode would really be silly here. However, i have a geometry question that is burning my lips but i only see my father in two days Will i be fine to use only the irf on my robot? Yes, but it says nothing about using it for inductive loads. To get my h-bridge to move, i need sensor, mine is a ir sharp range finder on a servo motor i might also make a version with an lcd screen and sonar range finder to see in total dark the range finder moves of 1 degree, takes the range of the object in front of it and repeat, like a sort of sonar.
Media New media New comments Search media. Started by fastline Yesterday at 8: Yes, place them on the drain and source of each mosfet. This helps reduce the irff effect from the transistor turning on and off. Thank you if you post of course. Related Posts.
IRF511 DATASHEET PDF
IRF511 MOSFET. Datasheet pdf. Equivalent