Woops, you have it backwards--the MOSFET is always fully ON except when limiting when it is partially ON.That is true but shouldn't it not make a difference since the mosfet should never really be on during normal operation? I only need this circuit to limit current for a split second during start up, after that it should run at 2.2 amps without limiting anything.
Sounds like you have a witch's brew cooking there with both the power supply and the current limiter each attempting to do their thing. Without actually digging into it myself, I cannot offer any suggestions.I am however, running into a simliar situation as when I used the first circuit with just a transistor. The power supply totally goes into OCP around 3.4 amps or so. However, it STARTS to go into OCP by reducing the output voltage at around 2.5 amps. When this occurrs, the transistor or mosfet in this circuit, become very hot and the gate voltage drops to around 3 volts. I think this is because the output from the power supply is changing and isn't 24 volts anymore, and therefore is altering the circuit. Is there any way around this?
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