Anand,
I would just at least a 100V mosfet, and I did not mention earlier but I found that the best devices are Polar, rather than Trench mosfets.
I'm surprised mosfets are getting hard to get; I favoured FQA40N25 and FQA36P15, both rated to 280W from Fairchild in the past.
I tried some other Trench mosfets and found they do not like linear operation; they are designed for on or off, nothing in between.
HD
I would just at least a 100V mosfet, and I did not mention earlier but I found that the best devices are Polar, rather than Trench mosfets.
I'm surprised mosfets are getting hard to get; I favoured FQA40N25 and FQA36P15, both rated to 280W from Fairchild in the past.
I tried some other Trench mosfets and found they do not like linear operation; they are designed for on or off, nothing in between.
HD