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Constant Current - Constant Voltage - Low Voltage LEDs and Their Driving Circuits

As LED technology develops and new solutions show up on the market just about any week, it really is Constant Current Regulators getting good difficult to find out which option would be the very best for your applications and more importantly, what features you spend focus on during purchase. In my previous article at LEDcentre.uk.com about general features of LED transformers I already mentioned that LEDs require special transformers features.

LEDs are highly responsive to changes in the voltage and current, so if you are coping with Constant Current Regulators lv Leds, wire-wound, stabilized transformers will be the safe solution. As stated within the article, nearly all household LED lights operating at low voltage require constant voltage drivers for his or her operation. However, recently, using the increase of high power LED technology, constant current circuit solutions are getting to be more frequent. Below, I'll offer a short description of methods these circuits work, and why it is crucial to pay attention to details in the acquisition of the driving force because of these applications.

Three components matter in the operation of LED lights: voltage, current and heat. LEDs are highly understanding of a modification of all of these, so their regulation is vital for gaining a long lifespan. Current is often looked at as an exponential purpose of voltage, therefore a small amount of alternation in voltage can lead to a sizable change in the present. That is why a lot of the LED lights need stabilized constant voltage power. However, current load may also greatly increase using the increase of heat. In order to avoid overloading, LEDs are impelled from low voltage DC by way of a current limiting resistor or constant current regulators. Another additional option is the cooling from the LEDs with heat sinks. Don't assume all LEDs attach to heat sinks though, and that's why the limitation about the hours of application is indeed important. If LEDs are operated more than they're designed to, they overheat, increasing the current (even when within the range limited by the resistor), and lose a few of their lifespan.

Constant current circuits are especially safe for top power LED lights, because they are suited to 24/7 operation. When the LED light is manufactured with constant current circuit, the present is fixed from the stabilized transformer, plus it does not generate further heat inside the LED light. By less heat generation, the LED gains a longer lifespan. Also, constant current source keeps the LEDs brightness constant. These constant current lights are, however, not suitable for operation with 12V batteries, since batteries are constant voltage power supplies.

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