compatible with triac dimmers dimming technology

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As mentioned above, the SCR dimmer LED dimming has become a hot market, many domestic and foreign manufacturers have introduced a compatible SCR dimming driver IC. Buck or flyback architecture. Some IC APFC technology to meet the requirements of high power factor. Some IC using the primary control technology (PSR) to cancel the light even and TLV431, in order to reduce costs. Some IC APFC + PSR two architecture to achieve a smooth flicker-free dimming. However, how to design the LED drive circuit, high power factor, high efficiency, wide range of thyristor dimmer compatibility, while meeting a very small space limitations, a number of issues must need to be resolved. There is no a in terms of size, high efficiency, compatibility, cost satisfactorily resolved the program.


       Orion three sections based on O2Micro drive dimming lampada led bulbs

       It is based on this, O2Micro has developed a unique LED control IC to solve the above problem. The IC SOP-8 package, use the PSR, the cancellation of the light even and TLV431. APFC functions int egrated in a single-stage architecture to meet the full load PF greater than 0.9, reduce the size as much as possible, to meet the bulb, PAR lamps, there are stringent requirements for space applications. Uses a unique internal dimming control algorithm can not only ensure the full conduction angle LED current accuracy while meeting the many different types of dimmers, while overcoming the flashing of the LED in a small conduction angle. The IC also integrates LED lights open, short circuit protection, and a unique control method to lower short-circuit power;

Segmented analog dimming


       By the above analysis, the TRIAC dimmer three problems: First, power consumption, especially at light loads, only about 10% efficiency; support TRIAC Dimmable LED lighting driver program is difficult to to be accommodating to all the TRIAC dimmer on the market. Third, is also worth noting is the largest LED lighting market (the off ice of the global lighting market) is commonly used fluorescent lamps, TRIAC dimmer in its infrastructure, which requires in the absence of the TRIAC dimmer occasions to achieve the dimming function.


       We can speculate that the most feasible way of dimming is not set new standards does not change the status quo, and do not need to change the wiring, do not add any dimmer dimming feature a program can achieve. Under such conditions, dimming function on the basic wall switch (wall switch), has become the most practical considerations.


       In this context, O2Micro the invention to use the wall switch three-segment electrodeless lamp bulb / lamp dimming technology, the use of analog dimming technology into the patent-pending, it does not require the TRIAC dimmer, simply use the wall The power switch can be achieve d in three sections dimming (100%, 50%, 20%), no RF remote control circuit, not only the cost of dimming can be done to lower, but also to remove the remote control.