Hi,
I am planning to build a 150amp 12v N-Channel H-Bridge controller by using irfz44n mosfets.so Please help me.i dont want to use market ics to drive high and low side.
Thank you all for you replay.
I always like to create my own circuit,I am into self Developing type so,I would like to parallel irfz44n mosfet for high current since i want to drive a motor into both direction and control its speed using pwm circuit.
I only have 12v to drive my motor but i would make a separate power supply for logic circuit.i.e only 12v power for my motors and separate power supply for logic circuit if needed.
I Got 25 Of them ,so I am emphasizing to go with the N-Channel Type ,Please direct me how to built it.
I am using this circuit with a IC555 for PWM Purpose and allow it to work in 3 way(CCW CW And stop)
What frequency do you expect your pwm to be?
You will need some kind of SMPS or charge pump to get enough voltage to drive the upper FETs. Also some current sharing resistors in series with the FETs wouldn´t hurt.
No. it has only 100ma of output current. This is no-where near enough current to switch the 16 MOSFETS fast enough.
The MOSFETs will spend most of their time in their triode region, producing heat.
Even if you used 1 on each MOSFET, it would not switch fast enough to keep them from destroying eachother.
You need to switch the MOSFETs in the tens of nanoseconds (or less) when you are dealing with that much current.
ALSO, the more current you can supply to the MOSFET gate, the faster they switch out of the triode region and into saturation.
Saturation is where the MOSFET is at its lowest resistance point (between source and drain) The lower the resistance, the lower the temperature.
MOSFET gate drivers are so cheap these days, that you would be doing yourself a disservice by not using them.
Find a friend who will mail them to you. This is the internet for goodness sake.. You can find someone to help. Also, there are companies that do ship internationally.
Take a look around. Many drivers support more than 1 MOSFET per chip.
I use a lot of Claire drivers. They have built in opto-isolation that helps reduce space needed and part count.