I build this circuit out of curiosity to make DC to AC converter for my workbench (sorry 'bout the drawing in it). Try to configure this i use 555 timer to generate 120hz to make the flipflop generate 60hz then I added 10k, 1k resistor and a 1uF resistor then i use a d flipflop as my inverted output at the same time i used it as driver of H-bridge n-type mosfet (feel free to choose any) then i use 7805 ic to power up the timer and flipflop..... why d-flipflop? Because its cheap that simple...
To andre: it was given that FF output current is max of 20ma said on the datasheet if your looking at 1.... ofcourse it can drive low-profile (low power) mosfet... duh.... i used it on my project at school..... but if you want more sophisticated device i prefer use sg3524n... please be reminded to read the datasheet carefully.......
How much more would it really cost to use a designed H-bridge
driver IC to buffer the DFF's output up to reasonable sized FET
gate loads? Or are you looking for a trivial output current on
this project (claiming a DFF can drive a power FET, might be
true in some sense for some size of FET, but liable to be a
disappointment). I would expect the gate transition times to
be rather leisurely and prone to cross conduction in the bridge
legs.
Well... to tell the truth our professor challenge us to built a circuit using DFF as part.. to give an Alternating output atleast upto 100mA enough to drive a motor in 60hz frequency... the only parts i do have is 2n7000 and a 555timer... but if you have any suggestions please let me be advised....
The 2n700 is a very small mosfet. it has a typical RDSon of 1.2 to 5 ohms. And that is with a very low 60 volt breakdown voltage.
As others have mentioned, you may still use a D flip flop to generate the basic timing signals, but a legitimate bridge driver, with high voltage withstanding and current sourcing capabilities, plus dead time adjustments, is necessary to properly drive an AC-motor capable inverter.