Choose the right energy-efficient drive solution for different DC-DC LED lighting applications

In recent years, the application fields of high-brightness LEDs have been increasing, covering a wide range from backlights for mobile devices, medium and large-sized LCD backlights, automotive interior and exterior lighting, and general lighting. Common DC-DC LED lighting applications include landscape lighting, internal low-voltage road lighting, solar-powered lighting, automotive lighting, emergency vehicle lighting, marine applications, low-voltage halogen replacement, and aircraft interior lighting. This article will focus on how to choose the right ON Semiconductor energy-efficient driver solution for different DC-DC LED lighting applications.

Table 1: Common DC-DC LED Lighting Applications

LED DC-DC Switching Regulator Topology

According to the relationship between input voltage and output voltage, we can classify the topology of LED DC-DC switching regulator into the following types:

Buck: Suitable for applications where the minimum input voltage is always higher than the maximum voltage of the LED string under all operating conditions. For example, use this topology when driving a single 1 W LED with a 12 V supply.

Boost: Suitable for applications where the maximum input voltage is always below the minimum voltage of the LED string under all operating conditions. For example, use this topology when driving 6 LEDs with a 5 V supply.

Buck-Boost, or Single-Ended Primary Inductor Converter (SEPIC): Suitable for applications where the input voltage overlaps the output voltage. For example, this topology can be used when driving 4 LEDs with a 12 V car battery.

Different topologies are suitable for different LED driver solutions. As the premier supplier of high-performance silicon solutions for energy-efficient electronic products, ON Semiconductor offers a broad range of energy-efficient drive solutions for a wide range of LED lighting applications, using its expertise and expertise in power management. Includes a variety of energy efficient DC-DC LED lighting solutions.

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