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Brightest
white LED in market: Analysis of brightness, V & I characteristics
of HB LEDs
Voltage and current characteristics of high brightness
white LED.
High Bright (HB) white LEDs offer significant advantages
of space saving, power saving, and long life over CFTs and
other filament lights. However the LED light output is very
sensitive to the input voltage and current. This demands
highly regulated voltage and current to be fed to white
LED to derive optimal light output from white LEDs. White
LEDs released in year 2008 have significant improvement
in light output and other electrical characteristics. Here
in this short article the behavior of latest white LED for
varying voltage and current are analyzed and you have a
choice to choose the brightest LED. At these very initial
stages of white LED innovation, power designer has to be
wiser in selecting right component.
The forward voltage, Forward Current, and Max Light output
are compared and analyzed in this below table.
| Company |
Part Number |
Forward Voltage |
Max Forward Current |
Max Light output |
| Vishay |
VLMW63 |
2.9 to 4.3 V |
150 mA |
11 lumens at If =140 mA |
| Toshiba |
TL12W02-D(T30) |
6.3 to 7.9 V |
300 mA |
90 lumen at If =
250 mA |
| Panasonic |
LNJ090W3GRA |
3.0 V to 3.6 V |
750 mA |
80 lumen at If = 750 mA |
| Luxeon (Philips Lumileds) |
LXHL-PW09 |
3.03 V to 4.47 V |
1 Amp |
80 lumen at If = 1 A |
| American Bright Opto-electronics |
BL-PPW-TS6-AHJ-1 |
3.6 to 4.0V |
350 mA |
52 lumen at If = 350 mA |
The variation of Forward Current VS Forward Voltage for
all the above parts is plotted in below graph. The safe
Forward Current at which the peak light ouput is generated
is also marked.
Below are the links to download the datasheet of these
above mentioned parts:
Vishay's VLMW63
http://www.vishay.com/docs/81922/vlmw63.pdf
Toshiba's TL12W02
http://www.semicon.toshiba.co.jp/docs/datasheet/en/Opto/TL12W02-D(T30)_en_datasheet_080714.pdf
Panasonic's LNJ090W3GRA
http://www.twinhill.com.tw/pdf/LNJ090W3GRA.pdf
Philips Lumileds LXHL-PW09
http://www.philipslumileds.com/pdfs/DS45.pdf
American Bright BL-PPW-TS6-AHJ-1
http://solidstate-lighting.com/pdffiles/Highpower/BL-PPW-TS6-AHJ-1.pdf
We conclude Toshiba' TL12W02-D(T30) as the best choice
in all aspects. But for low lighting purposes you may have
better alternate from other cheap sources mainly from China.
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