Electronic Design

LED-String Driver Operates from Single Cell (.PDF Download)

This design describes how to light a string of LEDs of any color from a 1.5-V cell using just a few inexpensive components. The circuit (see figure) forms a self-oscillating, unregulated step-up converter that can deliver an average output power of about 230 mW to a load when the nominal input voltage is 1.5 V, with power-conversion efficiency of approximately 65%. The driver has been tested with a string of three standard white LEDs (see table)...

Register to view the full article

By registering on Electronic Design now, you'll not only gain access to premium content, you'll also become part of an exclusive, robust global engineering community!
Participate in Expert and Reader driven Q&A's
Start your own conversation by commenting on any article or blog
Download high-quality content including the highly anticipated Salary & Career Report