The different
types of LED-based lighting applications and their requirements vary widely. To
enable the complex control functionality and consistent light quality required
for more advanced lighting applications, simple fixed-function LED drivers may
become insufficient.
Although
fixed-function LED drivers have many advantageous qualities and are appropriate
for many lighting systems, their capability for intelligent lighting system is
limited. Similarly, with relatively fixed function operation, more flexible
solutions become advantageous when looking at design reuse across a product
line.
Significant cost
reductions can be realized in design and purchasing when varying power and
feature set requirements can be implemented without significant hardware
modification.
Smart LED-based
lighting systems require digital control using programmable
microcontroller-based architectures that enable increased levels of
intelligence and design flexibility, as well as efficient and cost-effective
control of the luminaries power supply. Such architectures are able to support
varying LED types and string lengths/numbers, and unique power stage
requirements, generally with no major hardware changes.
Most
importantly, programmability also enables more advanced lighting control and
likewise, this flexibility afforded by digital control means that a single
controller can support a wider range of products to help lower overall system
costs.
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