Hi,
I'm pretty new to electronics, and I hope to get some help and advise from you guys
I’m in the design process of the supply section of a PCB. It will have a 12VDC supply and will be powered by either a 12V solar battery, or from a 12V wall adapter. Here is the circuit:
First is a P channel MOSFET, for protection, that turns off if the connections (+/-) are reversed. After that I have a 2200uF capacitor (will be electrolytic).
I have a question regarding inrush current caused by the capacitor. I did a simulation of the circuit and saw current go all the way up to 1500A!
The current stabilizes after approximately 75 microseconds. This simulations contains almost no resistance to the capacitor, so in real life, the current would probably not go this high. This circuit will normally draw very small currents (<50mA), but could draw up to 3A at most. But anyway; could this inrush current cause the diode, MOSFET and/or power supply to break? If so, is there a good way to suppress this current without reducing the efficiency of the circuit in steady state? Or does it last too short to be able to affect any components at all?
Thanks
I'm pretty new to electronics, and I hope to get some help and advise from you guys
I’m in the design process of the supply section of a PCB. It will have a 12VDC supply and will be powered by either a 12V solar battery, or from a 12V wall adapter. Here is the circuit:
First is a P channel MOSFET, for protection, that turns off if the connections (+/-) are reversed. After that I have a 2200uF capacitor (will be electrolytic).
I have a question regarding inrush current caused by the capacitor. I did a simulation of the circuit and saw current go all the way up to 1500A!
The current stabilizes after approximately 75 microseconds. This simulations contains almost no resistance to the capacitor, so in real life, the current would probably not go this high. This circuit will normally draw very small currents (<50mA), but could draw up to 3A at most. But anyway; could this inrush current cause the diode, MOSFET and/or power supply to break? If so, is there a good way to suppress this current without reducing the efficiency of the circuit in steady state? Or does it last too short to be able to affect any components at all?
Thanks
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