Hello all.
This is my first post in here so take it wasy on me.
I am looking into driving a single Luxeon K2 @ ~700mA with a 3.7V Li-Ion battery. I can do two batteries in parallel and increase the current the batteries will provide. So my question is, is this posible with a LM1577 and step up the voltage to about 5V?. The led uses 3.6Vf. Any Ideas, comments would be appretiated. I also looked at the LM317, but it just takes too much of a V drop and I don't want that. If not what would be better way of doing it. I've also seen many flashlights running high power leds on just one single battery, how can they do this? They use a step up regulator?
Thanks,
Jose
This is my first post in here so take it wasy on me.
I am looking into driving a single Luxeon K2 @ ~700mA with a 3.7V Li-Ion battery. I can do two batteries in parallel and increase the current the batteries will provide. So my question is, is this posible with a LM1577 and step up the voltage to about 5V?. The led uses 3.6Vf. Any Ideas, comments would be appretiated. I also looked at the LM317, but it just takes too much of a V drop and I don't want that. If not what would be better way of doing it. I've also seen many flashlights running high power leds on just one single battery, how can they do this? They use a step up regulator?
Thanks,
Jose