Basically, yes, but as c_mitra points out, you need to increase the voltage as well as the current. If you can drive the gate close to 12V it will ensure it becomes fully conductive and if you provide enough current to rapidly charge the gate capacitance to 12V and discharge it back to 0V it will minimize switching losses. You should be able to find examples of gate driver circuits if you search.What if I don't have any gate driver ic, is it the same as using a buffer stage with bjt transistors and using the battery to power them to drive fets?
Basically, yes, but as c_mitra points out, you need to increase the voltage as well as the current. If you can drive the gate close to 12V it will ensure it becomes fully conductive
Brian.
Hi,
You don't tell about switching frequency...
You need very close match of the duty cycles.
Add overvoltage protection very close on both Mosfets between drain and source. At least 30V working voltage.
Klaus
OK so if I am using a bjt stage with bc547 and bc557 I would use the 12 to 14v from the battery and that would drive the gate of the fets while the 5v from the arduino would be driving the bjt stage...
Yes. But you also need to be signed up to write a post.Do I need to sign up to upload images here these days?
What do you mean by 55%?and 55% duty.
I made a mistake the first time when I added the buffer stage, I tried again and it worked, atleast I'm getting a high frequency of 5khz and 144v and 55% duty.
Fets doesn't warm up as power is applied like they normally do, they stay cool
The mystery deepens; At 5kHz, your transformer will be getting warmed up. Just because of its mass, it may appear cool.
Can you reduce the frequency in steps (say in steps of log2) and tell us more?
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