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08/11/2013 09:39
Waterproof LED power supply LED drive power is a kind of power supply is to convert to a specific LED Downlight voltage and current to drive the LED light of the voltage converter , under normal circumstances : LED drive power input includes high frequency AC ( ie electricity ) , low...
08/11/2013 09:33
4.5 inrush current
Triac dimmer for incandescent lamps , for its input current surge and cold resistance of the LED Downlights filament incandescent lamp , the LED dimming load input current value of this surge triac dimmer than incandescent smaller , triac dimming circuit...
08/11/2013 09:33
Dimmable LED lighting system maximum dimming level is how much ?
LED Lighting china
4.3 dimmer adjustment range of physical properties and optical output
( 1 ) The physical dimmer adjustment range is the number ? Corresponding LED dimming range is how much ?
( 2 ) in the...
07/11/2013 09:25
B: GAP yellow-green chip, the emission wavelength does not have a large error , but because the LED Lighting china human eye color sensitivity of this band is very simple detect yellowish , greenish. Because the wavelength is epitaxial wafers data resolution , the smaller the area ,...
07/11/2013 09:24
5 Reverse Leakage :
LED Bulb A: Reason: epitaxial materials, chip manufacturing, equipment, packaging , testing typically 5V lower reverse leakage current is 10UA, it can be fixed reverse voltage Reverse current quiz .
LED Module
B: not the same type of LED reverse features big...
07/11/2013 09:17
Conventional street lighting lamp and power supply are separated, often malfunction is head - MR16 high pressure sodium lamp , high pressure sodium national standard warranty period of one year , street management unit will keep a certain amount of sodium library , high pressure...
06/11/2013 09:32
Figure 3 : Four die than three -mode efficiency above 10%
LED Downlight
In multi-channel LED driver NCP1840 , for example, the device can help the user to create any lighting graphics, independent drive up to eight LED.
LED Strip
Since the processor is no longer required to directly control...
06/11/2013 09:32
2 ) Charge pump type scheme
MR16 ON Semiconductor 's patented four -mode (Quad-Mode ®) adaptive fractional charge pump EER market conventional tri-mode charge pump provides 10% higher , and reduce as much as 65 % of the package, the LED drive performance elevated to a new level ....
06/11/2013 09:32
A ) inductor boost and buck program LED Downlights
In the inductor boost topology , the ON Semiconductor offers using PWM and / or single-wire dimming of different products suitable for use in low-voltage portable device backlighting and flash applications drive white LED. These products...
05/11/2013 09:28
For security reasons, the voltage may be specified in the offline and isolation between the output MR16 voltage . This application mode, the most cost-effective solution is to use flyback converter ( Figure 4 ) , in all isolated topologies, this approach required a minimum...
