Easy LED driver design reference boards
The right topology and features for every LED lighting design
LED applications are often powered by an AC-DC supply, a battery or a transformer with a low AC output. Some of those are not or loosely regulated. This results in the need for a LED driver design to provide constant current or constant voltage to the LEDs. Regardless of the many functions such as communication required by LED lighting, the development of the power supply block is, where several functions are concentrated, a key point.
Current LED solutions LED, including LED drivers, offer excellent dimming options using DALI, Push-Dim or 1-10V, while several LED drivers need to be controlled in parallel, and are featuring an additional power supply for external sensors. From safe power supply units to creative light control via wireless interfaces. Modular LED power supply systems allow various components to be combined in a solution that precisely meets of the various application needs for indoor and outdoor lighting, LED string and signage designs, residential and commercial lighting applications.
LED power supply units and LED drivers are required to offer a maximum efficiency, power factor (PFC), total harmonic distortion (THD) and are subject to particular requirements with regard to safety (EN 61347-1/-2-13), EMC (EN 55015), harmonic current emissions and further specific requirements of standards like UL and IEC.
Create innovative and differentiated LED lighting power supply units with our solutions for high-density LED drivers with wide dimming range:
LED driver designs—high efficient ACDC conversion powering your LED lighting application
Typically, LED drivers are deployed to provide a constant current to LED light engines for applications like commercial indoor lighting, street lighting, and high bay lighting. The topology used in design depends on the power rating and feature set. Low-power and cost-sensitive LED lighting applications usually turn to single-stage flyback topology. For higher power ratings and larger feature sets, dual-stage topologies with a dedicated stage for power factor correction (PFC) and a dedicated stage for flyback or LLC are common.
Using primary constant voltage with secondary buck stage is a further option. This topology supports intelligent lighting features as well as low dimming levels and other features. Ultimately, the topology most suitable for your design depends on the specific features to implement and your platform concept. Learn more about our Lighting ICs
Linear LED controller ICs for dimmable LED applications are a perfect fit for LED applications such as light engines, modules, and strips by combining a small form factor with a low cost.
Through its higher integration, BOM savings and protecting long lifetime of LEDs, these LED controller ICs have many advantages over discrete, and in various cases, DC-DC buck IC solutions.
The BCR-family controls the driving current under all conditions. Compared to using a limiting resistor this increases the longevity and reliability of your system and also allows the usage in outdoor or automotive applications featuring PWM dimming at high dimming frequencies, allowing flicker-free light.