the lamp i am using for testing at the moment is 150w however i intend to go with 300+ .
Alec_t: the problem i had with the VGS voltage stemmed from my assumption that the lower fet, when turned on will conduct the peak 34V from its drain to the source - this then passes through the body diode of the top fet to the load.
I figured that when the lower fet turns on, its source would be equal to the 34V peak value at the drain - but with the flow of current inverted in relation to the opposing cycle, i assumed this to be -34V at the source of the bottom fet and therfore a large VGS value incorporating the positive capacitor value and the negative source value.
Can i pester you for a quick explanation of why this is wrong (not that i question it isnt).
I think it is likely coming from the way i am visualising the voltages and currents, making elementary errors.
Thanks for the input folks!
Alec_t: the problem i had with the VGS voltage stemmed from my assumption that the lower fet, when turned on will conduct the peak 34V from its drain to the source - this then passes through the body diode of the top fet to the load.
I figured that when the lower fet turns on, its source would be equal to the 34V peak value at the drain - but with the flow of current inverted in relation to the opposing cycle, i assumed this to be -34V at the source of the bottom fet and therfore a large VGS value incorporating the positive capacitor value and the negative source value.
Can i pester you for a quick explanation of why this is wrong (not that i question it isnt).
I think it is likely coming from the way i am visualising the voltages and currents, making elementary errors.
Thanks for the input folks!