qumefox
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1.5V~4.2V 3W Cree Circuit Board for Flashlights (16.7mm*5.6mm) - Free Shipping - DealExtreme
They aren't 'user friendly' though unless you like SMD soldering. Since the only way to change current, is to change the current sense resistor. They seem to do ok up to 1.4A out if heatsinked properly. I haven't attempted to parallel them yet but judging by the way they operate, I don't think it would be an issue with them.
I do recommend adding some filtering to the output though if using them on anything other than a 445.
back when I tested them, the output was relatively flat with input voltages between 3.2 and 4.2V. Below 3.2, the output starts sagging as the voltage drops though.
the ak007 drivers are also nice little boost drivers, and the current is adjusted the same way, by changing the sense resistor.
They aren't 'user friendly' though unless you like SMD soldering. Since the only way to change current, is to change the current sense resistor. They seem to do ok up to 1.4A out if heatsinked properly. I haven't attempted to parallel them yet but judging by the way they operate, I don't think it would be an issue with them.
I do recommend adding some filtering to the output though if using them on anything other than a 445.
back when I tested them, the output was relatively flat with input voltages between 3.2 and 4.2V. Below 3.2, the output starts sagging as the voltage drops though.
the ak007 drivers are also nice little boost drivers, and the current is adjusted the same way, by changing the sense resistor.
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