Technically it is a circuit which is responsible for regulating and supplying the ideal current to the led. Led drivers may be constant voltage types usually 10v, 12v and 24v or constant current types 350ma, 700ma and 1a. Led drivers also known as led power supplies are similar to ballasts for fluorescent lamps or transformers for lowvoltage bulbs. Leds often use constant voltage drivers for illuminating landscape and accent lighting, backlighting for advertising signs, and huge highdefinition led displays. According to different applications, different types of led drivers need to be applied. This means you need to find an ac driver that can run up to watts like our phihong 15 watt led driver. What is the purpose of a led driver and how does it work. An led driver is an electrical device that regulates power to an led or a string of leds. Ac led drivers are actually nominimum load transformers, meaning they could technically operate lowvoltage halogen or incandescent bulbs.
How to choose the correct led driver for your led lights. Using one is very important in preventing damage to your leds as the forward voltage v f of a highpower led changes with temperature. Zeppelin definition is a rigid airship consisting of a cylindrical trussed and covered frame supported by internal gas cells. The light emitting diodes are low energy, lighting devices with a long lifespan and low energy consumption, hence the requirement for specialized power supplies. Since led packages and arrays are not presently standardized, it is very important that a driver is selected. It responds to the varying needs of an led circuit by delivering aconstant quantity of power to the led while its electrical properties vary with temperature. Most led drivers are designed to provide current to a specific device or array. Led drivers are electrical devices that prevent damage to leds by. High power leds differ from regular leds in a number of respects. One definition of useful life for leds is the point at which light output declines by 30%.
It specifically serves lowpower portable and highdefinition devices e. That driver takes input from the building in alternating current or ac and converts it to direct current or dc. Led drivers are electrical devices that regulate the power that an led or a string of leds is exposed to. Constant current and constant voltage drivers are both viable options for a power supply for led light sources, what differs is the way in which they deliver the power. Download drivers for nvidia products including geforce graphics cards, nforce motherboards, quadro workstations, and more. It is an electrical device that delivers power to a string of leds in a regulated manner. It is a crucial piece to an led circuit and to operate without one will result in system failure. Ac led drivers are actually nominimum load transformers, meaning they could technically operate lowvoltage halogen or incandescent bulbs as well. In your home that means from 120vac down to 36vdc or. To help keep leds running in top form is where an led driver comes in.
This means converting the high ac mains voltage which ranges from 120 volts to. The led driver rectifies the ac and lowers the level to suit the requirements. The led driver provides power and regulates the variable needs of leds by providing. In your home that means from 120vac down to 36vdc or 48vdc. Led drivers are usually switching mode devices that convert the input voltage typically 120220 vac or 12 vdc into a voltage at which the current drawn by. An led driver performs a function similar to a ballast for discharge lamps. Led drivers are the driving force that provides and regulates the necessary power to make sure the leds operate in a safe and consistent manner. The flexblock led drivers are boost drivers which means they can output a higher voltage than what is supplied to them.
Firstly, current regulation using resistors is impractical so its necessary to use a. An led driver is a self contained power supply which regulates the power required for an led or array of leds. Ac led drivers are typically used with bulbs that already contain an internal driver that converts the current from ac to dc, so an ac led driver s job is to register the low wattage of leds and step down the voltage to meet the bulbs voltage requirements, usually 12 or 24 volts. The led drivers can be put inside the lamp or luminaire, which is called a builtin type or integral, or be put outside, which is called an independent type or remote. Its analogous to a ballast in a fluorescent or hid lighting system. Led drivers a practical understanding for lighting applications a practical understanding for lighting applications dr.