Led Driver Circuit Diagram

This dimmable led driver is designed to power a 60 v led voltage string at 125 ma output current from an input voltage of 90 v ac to 300 v ac.

Led driver circuit diagram. In electronics an led circuit or led driver is an electrical circuit used to power a light emitting diode led. 1watt leds have ratings of forward voltage 3 2v 3 6v and forward current 300ma. Vf 3 4v forward current. To learn more about assembly techniques and to find out led part.

The basic principle behind the 230v led driver circuit is transformer less power supply. These capacitors are connected line to line and are designed for high voltage ac circuits. Parts this project shows several circuits for driving power led s. Running a series circuit helps to provide the same amount of current to each led.

Figure courtesy of power electronics. Circuit 3 of simple led circuits leds in parallel the final circuit in the simple led circuits tutorial is leds in parallel. While the ratings of a 3 watt led are forward voltage. Part list and circuit diagram.

Simple led light emitting diode circuit diagram. Therefore the transistor cannot turn on. When the switch of the circuit is open no current flows to the base of the transistor. So i m showing you the simplest high power led driver.

The requirements of a lighting application often dictate what type of circuit can be used but if given the choice the most efficient way to run high power leds is using a series circuit with a constant current led driver. The schematic of the led driver circuit we will build is shown below. In market we can get 1watt and 3watt led easily. The t2 transistor can be bc547 if you use only usual leds the 20ma versions but it is recommended to use bd135 bd137 or bd139 because they have a higher power dissipation.

The circuit diagram for leds in parallel connection is shown in the following image. In order to avoid much duplicated content this project only discusses specific circuits and their pros and cons. The circuit must provide sufficient current to light the led at the required brightness but must limit the current to prevent damaging the led. This circuit allows you to use any voltage between 2v and 24v to drive almost any type of led with power consumption up to 5w.