Bright Luxeon LED Bike Light

Step 17 Buck/boost configuration

The Micropucks are wired in parallel in order to properly power 3W Luxeons. In the LED driver world, this particular parallel config is known as "buck/boost." It offers a wide range of input voltage (1 - 7V) and will effectively power the LEDs until the battery is exhausted. The parallel buck/boost config nearly doubles the current over a regular boost config, but sacrifices some efficiency. Click here: http://www.ledsupply.com/docs/MicroPuck-Applications.pdf to visit an excellent document prepared by LEDdynamics, Inc. illustrating applications of the 2009 Micropuck. The configuration used in this project is described as "Two 2009s in Parallel, Buck/Boost."