P
Pete D
- Jan 1, 1970
- 0
I am PWMing a solar panel output or open circuit 36V to charge 2 lead
acid batteries in series to 27.6V and I am trying to decide how much
power is being dissipated by the switching FET. Is it relatively low
because when the output is off there is no power loss in the fet and
when the output is on there is only the current squared*the internal on
resistance of the fet and the average power is equal to the average
mark/space ratio. Or as the output is going through a low pass filter is
the power equal to the averaged volt drop across the FET squared divided
by the on resistance of the fet
i don't think I have explained wqhat I am asking well at all, but cannot
think how better to put it?
TIA
pete d
acid batteries in series to 27.6V and I am trying to decide how much
power is being dissipated by the switching FET. Is it relatively low
because when the output is off there is no power loss in the fet and
when the output is on there is only the current squared*the internal on
resistance of the fet and the average power is equal to the average
mark/space ratio. Or as the output is going through a low pass filter is
the power equal to the averaged volt drop across the FET squared divided
by the on resistance of the fet
i don't think I have explained wqhat I am asking well at all, but cannot
think how better to put it?
TIA
pete d