Single LED, 1.0A driver, 1.8V to 4.5V

[rmteo]

Has anyone done/seen a design of a regulated driver for a single LED at 1.0A using 2 or 3 NiMH/Alkaline cells or a single 3.0V/3.7V Lithium? Operating voltage range, 1.8V - 4.5V.

 

[Justin Case]

GD1000 boost-buck driver.

 

[rmteo]

Thanks.