Good morning everyone,
I could Need a Little help with the attached circuit.
So the basic idea is that the halfbridge driver drives the 2 nmos-gates. So there should be always 1 active (well atleast if you dont consider the fact that there is a deadtime). This should be done at a frequenzy of 125 kHz (T ~ 8 µs). So I got a variable R2 of 5.5 k Ohm (potentiometer) and the capacitor C3 to make sure the halfbridge driver works at this frequenzy.
--> I thought my 24 V DC would Change to a 0V to 24 V square wave (right before C2) and then Change to an -12V - 12 V AC (right before L1). But unfortunately when getting the whole thing done on a testing board nothing happend. I simple did not get a switching Signal out of the halfbridge driver ( --> neither did i get a square wave at one of the mosfets).
So do you have any ideas or suggestions to help me with that issue? I will add the mosfet as soon as I m able to find out which ones I used (I'm currently not in reach of these).
Maybe changing some values of c's and r's?
I m using the following halfbridge driver: IRS2153 http://www.irf.com/product-info/datasheets/data/irs2153d.pdf
Best regards
Alex
I could Need a Little help with the attached circuit.
So the basic idea is that the halfbridge driver drives the 2 nmos-gates. So there should be always 1 active (well atleast if you dont consider the fact that there is a deadtime). This should be done at a frequenzy of 125 kHz (T ~ 8 µs). So I got a variable R2 of 5.5 k Ohm (potentiometer) and the capacitor C3 to make sure the halfbridge driver works at this frequenzy.
--> I thought my 24 V DC would Change to a 0V to 24 V square wave (right before C2) and then Change to an -12V - 12 V AC (right before L1). But unfortunately when getting the whole thing done on a testing board nothing happend. I simple did not get a switching Signal out of the halfbridge driver ( --> neither did i get a square wave at one of the mosfets).
So do you have any ideas or suggestions to help me with that issue? I will add the mosfet as soon as I m able to find out which ones I used (I'm currently not in reach of these).
Maybe changing some values of c's and r's?
I m using the following halfbridge driver: IRS2153 http://www.irf.com/product-info/datasheets/data/irs2153d.pdf
Best regards
Alex
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