A Comparison of Light-Emitting Diode Power Supply Circuits

Abstract

In applications where LEDs use a large proportion of power and cell life is an important consideration, a power-conserving technique utilizing a switched circuit offers a considerable improvement in cell life. Two circuits, one utilizing a conventional method of resistive current limiting, and the other utilizing a switching method, were constructed and evaluated. The switching method yielded a 39% improvement in the duration of LED illumination.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 2007
Accession Number
ADA469794

Entities

People

  • Arthur Harrison

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Brightness
  • Circuits
  • Complementary Metal-Oxide Semiconductors
  • Diodes
  • Electronics Laboratories
  • Frequency
  • Illumination
  • Light Emitting Diodes
  • Metal Oxide Semiconductors
  • Military Research
  • Oscillators
  • Power Supplies
  • Resistance
  • Semiconductor Devices
  • Semiconductors
  • Switching
  • Voltage

Readers

  • Electrical Engineering
  • Systems Analysis and Design