I am looking to make my own LED drivers and this is why (one thing leads to another):
1. Its for over an aquarium. So I want to use cree XM-L LED's, which can be run at 3A for 10.05 watts each. I would like to be able to run them at this level, although I have some other LED's (for color) that need to be run at 1A and 1.5A. With all these different current levels, I would like to design one driver that can use an internal switch or jumpers to set the current, and then make multiple drivers for multiple channels. If all of these drivers were AC fed, it would get expensive. Most of the SMPS electronics are redundant and its where things get expensive. Also...
2. Its for over an aquarium. I would rather keep the 120v AC away if I can. So instead I have come up with a AC-DC SMPS that will supply me with 15-20 volts (adjustable) and up to 20 amps (up to about 3 amps per channel)! The power supply will take care of all the things like PFC, overload protection, surge protection, etc. This keeps the power going over the water to a low enough voltage so its safer.
The problem: it doesn't seem anyone makes drivers like what I want. It seems once you go over 1A everything just goes to an AC input. I have the high current and low voltage, what I need is:
-An adjustable current led (current) driver (up to 15 or 20 volts). Or at least something that I can easily swap out a couple parts to convert from say... 1A to 1.5A or 3A.
-15volt DC input power, up to 3A
-PWM dimming control from a controller
-most things will be handled in the PSU, but any applicable features like low voltage lockout, overvoltage input protection, output short circuit and open circuit protection (over voltage or overload protection).
Has anyone seen something like this? It seems without the AC/DC power conversion, most IC's dont even apply (may not be needed even), but I cant seem to find something that would work.
1. Its for over an aquarium. So I want to use cree XM-L LED's, which can be run at 3A for 10.05 watts each. I would like to be able to run them at this level, although I have some other LED's (for color) that need to be run at 1A and 1.5A. With all these different current levels, I would like to design one driver that can use an internal switch or jumpers to set the current, and then make multiple drivers for multiple channels. If all of these drivers were AC fed, it would get expensive. Most of the SMPS electronics are redundant and its where things get expensive. Also...
2. Its for over an aquarium. I would rather keep the 120v AC away if I can. So instead I have come up with a AC-DC SMPS that will supply me with 15-20 volts (adjustable) and up to 20 amps (up to about 3 amps per channel)! The power supply will take care of all the things like PFC, overload protection, surge protection, etc. This keeps the power going over the water to a low enough voltage so its safer.
The problem: it doesn't seem anyone makes drivers like what I want. It seems once you go over 1A everything just goes to an AC input. I have the high current and low voltage, what I need is:
-An adjustable current led (current) driver (up to 15 or 20 volts). Or at least something that I can easily swap out a couple parts to convert from say... 1A to 1.5A or 3A.
-15volt DC input power, up to 3A
-PWM dimming control from a controller
-most things will be handled in the PSU, but any applicable features like low voltage lockout, overvoltage input protection, output short circuit and open circuit protection (over voltage or overload protection).
Has anyone seen something like this? It seems without the AC/DC power conversion, most IC's dont even apply (may not be needed even), but I cant seem to find something that would work.