Hi,
I'm looking to design a simple little circuit to switch on and off a load that in the worst case will draw 5A at 3.3V.
The circuit needs to source the current, not sink it. The load is 192 LEDs and I want them all to have a common anode that I can control.
Furthermore, it needs to have a fast switching time, on the order of 1kHz at least, so I want to use something solid state.
I'm guessing some kind of power transistor will do, but I don't really know what design to use and how to handle heat (if that will be an issue at all.) I was looking at a 2N6488.
Also, is there any special considerations I should make when designing a PCB to handle that much current? Are there any issues I should know about?
I imagine this is quite a simple problem to someone with electronics experience, but I just don't know where to start and want to do it right.
Thanks,
Mitch
I'm looking to design a simple little circuit to switch on and off a load that in the worst case will draw 5A at 3.3V.
The circuit needs to source the current, not sink it. The load is 192 LEDs and I want them all to have a common anode that I can control.
Furthermore, it needs to have a fast switching time, on the order of 1kHz at least, so I want to use something solid state.
I'm guessing some kind of power transistor will do, but I don't really know what design to use and how to handle heat (if that will be an issue at all.) I was looking at a 2N6488.
Also, is there any special considerations I should make when designing a PCB to handle that much current? Are there any issues I should know about?
I imagine this is quite a simple problem to someone with electronics experience, but I just don't know where to start and want to do it right.
Thanks,
Mitch