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Registered Member #2941
Joined: Fri Jun 25 2010, 08:08AM
Location:
Posts: 143
Osama Ma'mon wrote ...
Hi All i nead help to make 4 mhz Oscillator but i nead it to drive 2 (60 amps igbt) without GDT
Hope You help me . Thank you.
same here, 4 Mhz (or mhz?) you need rf mosfet for the job, for the rest a royer oscillator might bring you there (I try with normal mosfet and never could go above 1 Mhz but it's also a problem to start the oscillation.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
A gate driver in TO-220 (TC4452) on a heatsink should do the job, or more of them in parallel. You can also try a "totem pole" of NPN and PNP fast bipolar transistors which can swith half an amp or so, driving a half bridge of small, low gate charge P and N FETs.
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3141
IRF510 are cheap and will work to about 20 MHz for more power you will need proper rf fets and good design/layout. Unless you have experience at this power/frequency level you should consider a commercial/ready made rf PA. There are lots of 27 MHz high power PAs on eBay for example. (CB 'burners')
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