PDF Design and Verification of a High Performance LED Driver with an Circuit Diagram Inductors: Inductors are used in LED driver circuits to store energy and smooth out the output voltage. When selecting inductors, look for those with a high saturation current rating and low DC resistance. Integrated Circuits: Many LED driver circuits use integrated circuits (ICs) for controlling the output voltage and current. When selecting We will learn how to calculate specific LED configurations for applying the LEDs with appropriate LED driver power supplies. In these driver power supplies I have explained two concepts one by using SMPS boards and the other by using capacitive power supplies. In the above high capacitive LED driver circuit, we can see 5 parallel strings of
Power LED driver circuit diagrams can vary depending on the specific requirements of the LED lighting system. Some LED drivers are designed for high-power LEDs, while others are optimized for low-power or dimmable LEDs. The circuit diagram may also include additional features such as dimming control, thermal protection, and power factor correction. For best overall LED efficiency (which is your stated aim) you want high efficiency LEDs plus high efficiency drivers. There are many high power LED modules available, but they in many cases use LEDs that are less efficient than the best available. No amount of efficient driving of a very low efficiency LED will make up for its low efficiency
High Power LED Driver Circuits : 12 Steps (with Pictures ... Circuit Diagram
When driving LEDs at 1A, the obvious first choice to drive them is by using a switching LED driver circuit. An issue that arises with this approach is that at this high of power, switching drivers will only be able to drive a single strand each. That means we would require a lot of drivers on this board.
In the above example circuit, the voltage source is a pure DC and the LED current set by the limiting resistor is 600mA. This gives a total LED power of 8.332W.The current limiting resistor is dissipating 3.67W.The total power applied to the circuit is 12W and the efficiency is only 69.43% which is very low.. LED Efficiency = 8.332W / 12W = 69.43% It is now time to design a driver to power them. This post goes through the calculations needed to design the circuit, the following post gives some recommendations on designing the PCB. Here is the final product. 26.4W Boost LED driver schematic 26.4W Boost LED driver PCB - 3D view
High-efficiency LED driver circuit Circuit Diagram
The most efficient way to drive high-current LEDs is to use a DC-DC converter with current feedback. Commonalities among switching LED drivers. DC-DC converters are efficient power-conversion circuits that use passive, low-pass LC filters to smooth out switching action into constant voltages.
