Hi all,
I'm trying to build a high power, high frequency LED driver for an optical communications project. My goal is to be able to power some high power LEDs (~1 amp each) at a high frequency (~30MHz or more) for data communication. The idea I had was to create a constant current source (most likely a simple circuit using an LM317 regulator), then try and modulate the brightness of the LEDs. Right now, I'm trying to figure out a good circuit for modulating the LEDs that quickly, as well as any advice on how to combine the constant current source circuit with the modulation circuit. I've seen several ICs available from MAXIM and other companies that act as high power LED drivers with switching frequencies up to 2MHz, but this is still lower than what I need. Any advice would be greatly appreciated.
Thanks, Gavin
I'm trying to build a high power, high frequency LED driver for an optical communications project. My goal is to be able to power some high power LEDs (~1 amp each) at a high frequency (~30MHz or more) for data communication. The idea I had was to create a constant current source (most likely a simple circuit using an LM317 regulator), then try and modulate the brightness of the LEDs. Right now, I'm trying to figure out a good circuit for modulating the LEDs that quickly, as well as any advice on how to combine the constant current source circuit with the modulation circuit. I've seen several ICs available from MAXIM and other companies that act as high power LED drivers with switching frequencies up to 2MHz, but this is still lower than what I need. Any advice would be greatly appreciated.
Thanks, Gavin