Please refer to the circuit above, when the current through R2 is about 1A, and the V_drain is under 7V, the circuit starts to oscillate.
but when V_drain > 7V seen to work alright, just under 2mV ripple on the V_source.
So my question is, what cause it? And how do I fix this?
Thanks.
PS: V_gate = ~3.4V