Do I Need an LED Driver?

Due to increasing energy regulations, most people are familiar by now with the long life spans and energy savings associated with LEDs, or light-emitting diodes. However, many are not aware that these innovative light sources use specialized devices called LED drivers to operate. LED drivers (also known as LED power supplies) are similar to ballasts for fluorescent lamps or transformers for low-voltage bulbs: they provide LEDs with the correct power supply to function and perform at their best. Below, we discuss when you need an LED driver, why you need an LED driver, and what type of driver you may need.

When Do I Need an LED Driver?
Always. Every LED light source requires a driver led lights in china. The question should be whether or not you need to purchase one separately, as some LEDs already include an integrated driver within the bulb. LEDs designed for household use (bulbs with E26 / E27 or GU24 / GU10 bases and that run on 120V) typically already include a driver. However, low voltage LED light sources, such as some MR- bulbs (MR GU5.3s, MR8s, and MR11s) and tape light, as well as certain fixtures, panels, or outdoor-rated lights, usually require a separate driver. Always check your product data sheet to see if your LED light source requires a separate driver. Why Do I Need an LED Driver?

LEDs are designed to run on low voltage (12-24V), direct current electricity. However, most places supply higher voltage (120-277V), alternating current electricity. An LED driver’s main purpose is to rectify higher voltage, alternating current to low voltage, direct current.

LED drivers also protect LEDs from voltage or current fluctuations. A change in voltage could cause a change in the current being supplied to the LEDs. LED light output is proportional to its current supply, and LEDs are rated to operate within a certain current range (measured in amps). Too much or too little current can therefore cause light output to vary or degrade faster due to higher temperatures within the LED.

In sum, LED drivers serve two purposes: to convert higher voltage, alternating current to low voltage, direct current, and to keep the voltage or current flowing through the circuit at its rated level.

What Type of LED Driver Do I Need?
There are two main types of LED drivers, constant-current and constant-voltage. Often, you can simply check the datasheet of an LED light source to find out if it requires a constant-current or constant-voltage driver warm LED spot lights gu10. For example, if an LED datasheet says that your light source requires a 350mA output, you need a constant-current driver. If a datasheet says that your LED requires a 12-volt output, you need a constant-voltage driver. Below, we’ll review the differences between each technology.

Constant-Current

FLX-3528WW1203Since LEDs are forward-current driven light sources, LED light mini spot lights all LEDs require a constant-current driver to work. They only require one separately if they do not already include an integrated one inside the bulb. Constant-current LED drivers are available with a variety of different attributes depending on application and required electrical output. Constant-current drivers keep the current flowing through each LED at the rated current to maximize the light output and life span of each diode. Constant-current LEDs and drivers are more widely used, as well as more efficient, than constant-voltage technologies. Examples of constant-current LEDs include tape light, signage/channel letters, under-cabinet fixtures, and pathway lighting.

Keep in mind that when constant-current LEDs are connected in a series, the voltage supply will drop with each new diode. Be sure to choose a driver with a suitable voltage to meet the current requirements. For example, if you put 15 LEDs in a series, and each LED has a voltage drop of 3 volts (at its nominal current), you will need to provide a voltage source of 45 volts (15 x 3V = 45V).

If your LEDs already include a constant-current driver as part of the assembly, an external constant-voltage driver is required. Low-cost LED circuits that control the current flowing through the LED with a simple resistor also require a constant-voltage power source. Constant-voltage configurations are typically used when a constant-current array would require a very high voltage due to a high number of diodes connected in series. Constant-voltage technology is used in applications such as LED fixtures, panels, and strip lights, as well as backlit ad signs, traffic information signs, and large-screen high definition LED displays.

When selecting a constant-voltage driver, make sure that the output current range is higher than the estimated current draw of your LEDs. The feeding current may vary according to the load. The higher the load is, the bigger the current draw becomes, which can affect light output.

Differences emerge in AAP's top rung

Differences in the top rung of Aam Aadmi Party have come to the fore with Manish Sisodia accusing Yogendra Yadav of targeting party chief Arvind Kejriwal and making internal matters public.

In a letter written in response to Yadav's email, Sisodia said, "Your (Yadav) broad allegations are Arvind (Kejriwal) does not listen to the suggestions of the PAC (Political Affairs Committee). I am surprised reading your email interlinings because till the time Kejriwal agreed with you, he was democratic." Sisodia was referring to the recent row between Naveen Jaihind and Yadav after which Jaihind quit the National Executive and the latter the PAC membership.

Yadav and Jaihind had unsuccessfully contested from Gurgaon and Rohtak Lok Sabha seats respectively. The former was the Haryana in-charge while the latter was the party's state convener.

Sisodia and Yadav were not immediately available for their comment.

The letter, which was written earlier this week, said that Lainiere De Picardie Interlining it was Kejriwal who backed Yadav's decision of contesting from Gurgaon despite other PAC leaders opposing the move, but the AAP chief managed to convince others.

"When you wanted to become Haryana in-charge and wanted to be projected as the CM candidate despite opposition from other PAC members, Arvind backed you. At that time he was democratic (for you).

"The state of affairs of the party in Haryana is in a shambles. Volunteers talk about your fight with Jaihind," he said.

Sisodia said, "You want strict action against Naveen (Jaihind) and when Kejriwal does not agree with you, then you call him of being a party supremo."

The former Delhi Minister said Kejriwal, after resigning as Interlining Manufacturers in India the Delhi Chief Minister, was not in favour of contesting Lok Sabha polls across the country, but wanted to focus on Delhi.

But Yadav along with other PAC members were in favour of contesting the polls and "the results are before us", Sisodia said.

"After the fall of our government in Delhi, you conducted a survey in Haryana which said that party may get around 23% of votes in the state, but under your leadership, it has managed to get only 3% of votes. This requires introspection," Sisodia said.

A senior AAP leader said the letter was written after the party's rout in Haryana.

"We were not expecting this dismal performance in Haryana and in fact Punjab was a surprise. The recent squabbles between Jaihind and Yadav prompted Sisodia to write the letter," the AAP leader said.