I'm trying to make a 200W audio amplifier, but on power-up it burned through a trace because, I think, of the high current charging the high capacitance. Here's the power supply:
I need the high capacitance because of the ripple current capability that comes with it.
This is the first higher current circuit I've designed, and I obviously overlooked some things. In the next image, the upper green trace between the transformer and bridge rectifier is the one that burned. It's 2.5mm wide and about 4.5mm long - which should be enough for the maximum steady-state current, but I didn't account for the capacitor inrush current.
I don't know how high the transient current is, but in simulation it can be 40A peak or more depending on the inductance of the transformer, which I don't know.
My question is: how is this sort of thing dealt with usually? Should I go with point-to-point wiring using large gauge wires up to the capacitors? Or some kind of active inrush limiting?
I need the high capacitance because of the ripple current capability that comes with it.
This is the first higher current circuit I've designed, and I obviously overlooked some things. In the next image, the upper green trace between the transformer and bridge rectifier is the one that burned. It's 2.5mm wide and about 4.5mm long - which should be enough for the maximum steady-state current, but I didn't account for the capacitor inrush current.
I don't know how high the transient current is, but in simulation it can be 40A peak or more depending on the inductance of the transformer, which I don't know.
My question is: how is this sort of thing dealt with usually? Should I go with point-to-point wiring using large gauge wires up to the capacitors? Or some kind of active inrush limiting?