I need to design a current limiter to limit the "inrush current" to a device. The device can consume 30A at 12 V for the first 10-20 seconds if the voltage is kept at 12 V.
I have a MOSFET to control the power to the device. The reason I need the current limiter is that the MOSFET only handles 10A. After the 10-20 seconds, the current will drop down to around 1-2A and therefore I do not want to just get a 30-40A MOSFET.
If I use a resistor to limit the current it will have to burn a lot of power, ~360W and that is not preferable. I want the solution to consume as little power as possible when the limiter is not activated, and not just burn the energy when it is activated.
Are there any standard solutions for this where I won't need a large heatsink?