LED Drivers

External LED drivers are self-contained AC/DC or DC/DC power conversion devices that regulate the voltage or current supplied to LED lighting systems. External LED drivers are standalone power supplies designed to be installed remotely or within a lighting fixture. They convert incoming AC mains (120-240VAC) or DC power into the regulated output required by LEDs while providing electrical isolation, current regulation, protection circuitry, and often dimming control. These drivers are commonly used in architectural, commercial, industrial, horticultural, signage, street lighting, medical, transportation, and specialty illumination systems where high efficiency, long operating life, and dependable current regulation are essential.

External LED Driver Selection Guide

Choosing the correct LED driver starts with understanding the electrical requirements of the LED load and the operating environment.

Determine the Output Type

The first decision is whether your application requires a constant current or constant voltage driver.

• Constant current drivers automatically adjust output voltage to maintain a fixed current. They are typically used with high-power LEDs, COB LEDs, and custom LED arrays where brightness, efficiency, and thermal stability depend on precise current regulation.
• Constant voltage drivers provide a fixed output voltage - most commonly 12V or 24V and are intended for LED strips, signage, architectural lighting, and other LED products with integrated current-limiting circuitry.

Match the Electrical Specifications

The selected driver should support the complete LED load across the expected operating temperature range. Verify that the driver's specifications match your LED load, including:

• Output current or output voltage
• Total output power (watts)
• Input voltage range (such as universal 85-264VAC, battery-powered systems, or industrial DC buses)

Consider Application Requirements

Many applications require additional functionality beyond basic power conversion. Selection criteria may include:

• Analog, PWM, 0-10V, DALI, ELV, TRIAC, or programmable dimming
• IP-rated enclosures for outdoor or industrial environments
• Electrical isolation and safety certifications such as UL, cUL, CE, ENEC, or Class 2 compliance
• Integrated protection features: Overcurrent Protection (OCP), Overvoltage Protection (OVP), Short-Circuit Protection (SCP), Overtemperature Protection (OTP)