Because LEDs are semiconductor materials that emit light when biased with electricity; an LED's electrical characteristics change slightly as their temperature changes.   Additionally, the length of wire in an LED circuit will also affect the power required to drive that entire LED circuit.

Therefore, the correct way to handle the task of pushing power to an LED is to vary the voltage in the correct way so that a constant volume of current is flowing across the LED at any given moment in time.   This ensures the LED is performing optimally and will not over-heat.

Constant current drivers are the correct solution for supplying electrical energy to hi-current LEDs.

This is our 2 channel LED driver "work horse".   This is a very simple rugged linear design that is inexpensive and very reliable.  If you load it correctly, it is also very efficient.   We have about 2 years experience with this product our customers have been very pleased with its performance.

The real strength to this product is the extended heat sink plane built into the board that help to quickly remove any heat from the power transistors.

The power transistors are rated for 5 Amps but we never push our designs past 3.5 Amps.  Without external heat sinking, the driver can accommodate 500mA easily per channel.  For greater output amperage, external heat sinks must be applied.

Output amperage is set by 1% 1/2 Watt (blue) resistors on the board.

All the active components on the boards are purchased from US companies who hold their products to solid manufacturing standards.  This is very important as there are Asian parts being sold in the marketplace that are substandard in quality.

We can supply this driver in flat arrays of up to 15 drivers (30 channels) and the drivers are scored between each unit so with some driving force, they can be broken apart in smaller sections as needed.