: The LED illumination application's energy efficiency needs to unify the power to lose the consideration. The US “star of the energy” the solid state illumination standard has stipulated the illumination appliance level energy efficiency, but does not involve alone the LED driver's energy efficiency request.

As mentioned above, uses AC-DC power source's LED application to be possible to use two section of type distributed topology,LED lights manufacturer therefore possibly uses the exterior AC-DC adapter power supply. But “star of the energy” indeed contains the related list to output external power supply's standard, its 2.0 edition of external power supply standard starts in November, 2008 to become effective, under the request standard working pattern the lowest energy efficiency reaches 87%, but under the low pressure working pattern the lowest energy efficiency reaches 86%;

When this standard, the power is bigger than 100 W only then requests PFC. But in uses AC-DC in power source's LED application, must provide the higher AC-DC transformation energy efficiency, involves to factor between and so on cost, size, performance standard and energy efficiency compromised questions. For example, if uses the high grade part, lower breakover impedance (RDSon),dvb t tuners may reduce the loss and the improvement energy efficiency; Will cut the turn-on frequency to improve the energy efficiency generally, but actually will increase the system size. Such as resonance such new topology provides a higher energy efficiency, actually also increases the design and part's order of complexity.

If we will design define in the narrow power and the voltage range, then may help the optimized energy efficiency.

The LED illumination application's energy efficiency needs to unify the power to lose the consideration. The US “star of the energy” the solid state illumination standard has stipulated the illumination appliance level energy efficiency, but does not involve alone the LED driver's energy efficiency request. As mentioned above, uses AC-DC power source's LED application to be possible to use two section of type distributed topology, therefore possibly uses the exterior AC-DC adapter power supply.

But “star of the energy” indeed contains the related list to output external power supply's standard, its 2.0 edition of external power supply standard starts in November, 2008 to become effective, under the request standard working pattern the lowest energy efficiency reaches 87%, but under the low pressure working pattern the lowest energy efficiency reaches 86%; When this standard, the power is bigger than 100 W only then requests PFC.

But in uses AC-DC in power source's LED application, must provide the higher AC-DC transformation energy efficiency, involves to factor between and so on cost, size, performance standard and energy efficiency compromised questions. For example, if uses the high grade part,dvb t mpeg4 lower breakover impedance (RDSon), may reduce the loss and the improvement energy efficiency; Will cut the turn-on frequency to improve the energy efficiency generally, but actually will increase the system size.

Such as resonance such new topology provides a higher energy efficiency, actually also increases the design and part's order of complexity. If we will design define in the narrow power and the voltage range, then may help the optimized energy efficiency.

The third session of semiconductor illumination lamps and lanterns recommendation product big game ended yesterday, altogether has 29 to participate enterprise's 56 model of lamps and lanterns product prize.

This evaluation by organization union sponsors and so on National Semiconductor Lighting engineering Shanghai Industrial production Base,dvb-t receivers is for the purpose of through ways and so on scene evaluation, carries on the comprehensive appraisal to the new semiconductor illumination lamps and lanterns' actual illumination effect, provides the concrete basis for the new product's technical change, the promotion entire industrial development.