LED TECHNOLOGIES DEPARTMENT

Integrated drivers

This research was conducted in Optogan company - one of the first companies in Russia that started development of LED technologies on an industrial scale.

Company leverages its competences in nanotechnologies to improve components miniaturization and integration in the LED lighting system.

Being a vertically integrated company, Optogan made every effort to optimize the end products at each stage of the design process to achieve the optimal solution for a reasonable price.

In the case of LED lamp replacement, this concept is manifested in the fact that we not only develop new effective light source (Chip-On-Board) but also holistically design the overall lamp and power supply (driver) architecture, optimizing its size and degree of integration.

In particular the driver offers several challenges for LED lamp replacement since on the one hand LED lamps must meet the technical and safety requirements and provide the most effective power output and excellent heat management, and on the other hand they must be affordable and have a minimized form to meet the aesthetic requirements of consumers.

That is why we are active in the development of integrated driver and alternative topologies for driving LEDs, with the final aim to totally or partially integrate the driver within the COB structure to have compact and affordable lamps.

Mainstream drivers today use switching topologies that have bulky inductors and transformers as well as several external components to perform dimming and control functions.

Driver integration means the progressive integration of active and passive components within the integrated circuit (ICs) and miniaturization of inductive components increasing the switching frequency. GaN technology has the potential to deliver this result due to the possibility of high switching frequency and compact structures. At the same time, in order to achieve progressive integration, we are experimenting with alternative topologies and circuit controlling algorithms that will completely rule out the need of external inductor and capacitor.

Typical example is Direct AC methodologies that efficiently regulate the LED current just slicing directly the AC waveform and minimizing the driver cost and size. In our research we collaborate with the most advanced semiconductor companies in the world and the most appreciated research institutes.

In summary, miniaturization and integration make it easy to create different LED bulb shapes, reducing the cost of assembling of the finished lamp thus making them more affordable for consumers.

 

Model of integrated driver