LEDs are inherently low voltage devices; depending on the color and current, the forward voltage of the LED can vary from 2 to 4,5 Volt. In addition, LEDs need to be driven with a constant current to ensure the intensity and color desired. This requires power conversion and control solutions to interface to the various power sources, be it the AC line, a solar panel, a 12V car battery, a DC power supply, low voltage AC system, or even primary Alkaline and Ni-based cells or rechargeable Li-ion battery cells.

Upon applications and user choices versus his know how and time to market requirements, several alternatives are possibles:

• Select a standard constant current AC/DC module (1).


• Select a standard constant voltage AC/DC module (1)  and design a DC/DC constant current LED driver. Silica offers a broad range of LED drivers from many suppliers as Diode/Zetex, Infineon, Maxim, NXP, On Semi, STM and Texas Instruments.
  This alternative don't require any certification as the standard constant voltage AC/DC module get all required certifications.


• Design your own AC/DC constant current power supply using design reference guides from Silica various suppliers as Maxim, ON Semi, NXP, STM and Texas Instruments.

(1) Avnet Abacus have a broad range of such constant current or constant
      voltage Power Supply from different suppliers. 
      For more information, please contact your Avnet Abacus Sales representative.

Power Supply:

• Constant Current
• Constant Voltage

LED Drivers

• Diodes/Zetex
• Infineon
• Maxim
• NXP
• On Semi
• STM
• Texas Instruments

Prototyping Boards

Electrical Drive Management
(Seoul Semiconductor)