All categories
Featured selections
Trade Assurance
Buyer Central
Help Center
Get the app
Become a supplier
(34973 products available)
Ready to Ship
4 7x1w 350ma LED drivers are devices used to power LED lights with a constant current of 350 mA. This is important for the safe operation of the LEDs, ensuring a steady brightness and preventing damage due due to excessive current. There are various types of LED drivers, which include:
Linear LED driver
A linear LED driver regulates the output current through passive components. It is simple and cheaper than the switching driver. However, it is less efficient and dissipates a lot of heat power.
Switching LED driver
It uses a high-frequency switch that is periodically turned on and off to control the output voltage or current. The driver's different topologies include boost, buck, and buck-boost converters.
Integrated LED driver
This type of driver combines almost all the external components into one package, making it easy to use and design. Manufacturers can choose the driver depending on the application needs.
Constant current LED driver
This driver can be linear or switching. It provides a constant output current and is widely used in lighting applications. It can be configured to provide different currents for various LEDs.
Constant voltage LED driver
Also, this driver can be linear or switching. It provides a constant output voltage, and an external resistor can be used to calculate the output current. The driver is suitable for applications where multiple LEDs need to be powered with a shared voltage.
Isolated and Non-Isolated LED driver
The isolated drivers use magnetic coupling between the primary and secondary circuits to transfer the power safely. Non-isolated drivers transfer power without magnetic coupling, and they are usually used when the voltage level is safe.
AC LED driver
This is an example of a constant voltage driver. It directly drives LEDs from an AC source without the need for rectification and voltage conversion. The driver is used in applications where LEDs need to be powered directly from AC mains, such as street lighting.
Boost LED driver
This is a switching constant current driver. It is used to power multiple series-connected LEDs from a supply voltage that is lower than the forward voltage drop of the LED string. The driver is useful in applications like portable devices where the battery voltage may be lower than the LED string voltage.
Buck LED driver
This is a switching constant current driver. It steps down the input voltage to provide a constant current output that is suitable for powering LEDs. It is used when the input voltage is higher than the forward voltage drop of the LED.
Buck-Boost LED Driver
The driver can be used when the input voltage is either lower or higher than the LED voltage. It combines the functions of the buck and boost drivers and is useful in battery-powered applications where the battery voltage can vary.
LED drivers are essential components in LED lighting systems, providing the necessary current and voltage to power LEDs safely and efficiently. Understanding the key features and functions of an LED driver can help buyers in selecting the ideal driver for their lighting application.
Constant Current Output
The LED driver provides a constant current output, ensuring that the LEDs receive a steady current regardless of changes in voltage. This feature is important for the longevity of the LEDs since it avoids overheating and excessive current that can damage the LEDs.
Output Voltage Range
The output voltage range determines the voltage levels at which the driver can power different LED configurations. A wide output voltage range allows the driver to be used with various LED strings and arrays with different voltage requirements.
High Efficiency
An efficient LED driver minimizes energy losses and generates less heat. An efficient driver lowers the operational costs of the lighting system and is more environmentally friendly. High efficiency is a major consideration when choosing an LED driver.
Dimmable
Dimmable LED drivers allow for adjustable brightness levels by varying the output current. They support different dimming techniques such as analog, PWM, and digital dimming. Dimmable drivers enhance the flexibility and energy efficiency of lighting systems.
Thermal Management
Thermal management features include temperature regulation and thermal throttling. Temperature regulation maintains consistent output current even when the driver temperature changes. Thermal throttling reduces the output current when the driver gets too hot to prevent overheating.
Short Circuit Protection
Short circuit protection safeguards the driver and LEDs from damage due to the short circuit. It detects the short circuit and disconnects the output or limits the output current to prevent excessive damage. This feature increases the reliability of the LED system.
Waterproof
Waterproof LED drivers have a protective coating or casing that prevents water and dust from entering the internal components. They are classified according to the level of protection, for example, IP65, IP67, and IP68. Waterproof drivers are suitable for outdoor lighting.
The LED driver has a wide range of applications. This makes it an important component in many devices and appliances. Below are some of the common usage scenarios.
LED lighting
The driver can be used in various LED lighting applications. For instance, in commercial, residential, and industrial lighting systems. It is also used in street lights, automotive lights, and architectural lights. The driver is ideal for these applications because it helps to regulate the current. This ensures consistent brightness and extends the lifespan of the LEDs. Additionally, it improves energy efficiency, making it suitable for large scale lighting projects.
Backlighting
The driver is widely used in LED backlighting. For example, in LCD displays of televisions, monitors and screens. It provides the required current to the LED backlight strips. Thus, ensuring uniform brightness and improved contrast ratio in the display panels. This is important in electronic devices where quality display is needed.
Signage and displays
LED drivers are also used in electronic signage and displays. For instance, billboards, scoreboards and digital displays. It provides high and stable output currents. This results in bright and vibrant LED colors that enhance visibility. This makes it suitable for outdoor and large scale LED displays.
Automotive lighting
These drivers are used in LED automotive lighting applications. For example, headlights, taillights, brake lights and interior lighting. The driver regulates the LED current. This ensures optimal brightness levels for different driving conditions. For instance, high beams and low beams. Also, the driver can improve the energy efficiency of vehicle lighting systems. This leads to battery conservation in electric and hybrid vehicles.
Specialized lighting
LED drivers are widely used in a number of specialized lighting applications. For instance, in horticultural lighting systems. The driver provides specific wavelengths of light that promote plant growth. This is important in indoor farming and greenhouse operations. Additionally, the driver is used in aquarium lighting systems. This enhances the beauty and health of marine life.
When selecting an LED driver, consider the following factors:
Power Requirements
Determine the power requirements of the LED lights. Add up the wattage of all LEDs that will be powered by the driver to ensure the selected driver meets their total power needs. Consider future expansion options as well.
Output Current and Voltage
Check the output current and voltage ratings of the driver. They should match the specifications of the LED lights. If the LED voltage is higher than the driver output, use a constant voltage driver. If the LED voltage is lower, a constant current driver is needed.
Compatibility and Dimming Options
Ensure the dimming options of the LED driver are compatible with the dimming system to be used. Select a dimmable or non-dimmable driver as required. Consider 0-10V, triac or PWM dimming for advanced dimming needs.
Efficiency and Thermal Management
Select an LED driver with high efficiency (above 85%). This reduces energy losses as heat, which is especially important for compact spaces. Check the thermal management features like heatsinks or fans.
Protection Features
Look for essential protection features like short circuit, overcurrent and thermal protection. These safeguard the driver and connected LEDs from damage, prolonging their lifespan.
Certifications
Check for industry standard certifications like UL, CE and RoHS. This ensures the driver is safe, reliable and suitable for various applications. It also indicates quality manufacturing practices.
Installation and Maintenance
Consider the installation requirements like wiring, enclosures and cooling. Evaluate the maintenance needs and costs over the driver's lifespan. Choose a driver that balances ease of installation and low maintenance.
Q1: What is the lifespan of an LED light?
A1: Normally, the lifespan of LED lights varies depending on the operating conditions, ambient temperatures, and power supply used. Typically, LEDs have a lifespan between 30,000 and 50,000 hours. This is more than the conventional lighting systems.
Q2: What does an LED driver do?
A2: An LED driver regulates the power supply to the LED light to ensure it operates efficiently. It supplies the necessary voltage and current to the LED and helps maintain its lifespan.
Q3: What are the signs of an incompatible LED driver?
A3: Incompatible drivers may cause flickering, dimming, or complete failure of the LED light. Also, overheating and reduced lifespan of the LED light are signs of an incompatible driver.
Q4: What are the signs of a faulty LED driver?
A4: Faulty LED drivers may cause flickering lights, inconsistent brightness, and buzzing or humming sounds. In extreme cases, they may cause complete failure of the LED light.
Q5: Can LEDs run on AC power?
A5: Yes, LED lights can run on AC power. But they require a compatible LED driver to regulate and convert the AC power to DC power. This way, the LED lights can operate efficiently.
