Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

LDS8160 Datasheet(PDF) 24 Page - IXYS Corporation

Part No. LDS8160
Description  Dual-Output RGB / 6-Channel WLED Driver
Download  39 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  IXYS [IXYS Corporation]
Homepage  http://www.ixys.com
Logo IXYS - IXYS Corporation

LDS8160 Datasheet(HTML) 24 Page - IXYS Corporation

Back Button LDS8160 Datasheet HTML 20Page - IXYS Corporation LDS8160 Datasheet HTML 21Page - IXYS Corporation LDS8160 Datasheet HTML 22Page - IXYS Corporation LDS8160 Datasheet HTML 23Page - IXYS Corporation LDS8160 Datasheet HTML 24Page - IXYS Corporation LDS8160 Datasheet HTML 25Page - IXYS Corporation LDS8160 Datasheet HTML 26Page - IXYS Corporation LDS8160 Datasheet HTML 27Page - IXYS Corporation LDS8160 Datasheet HTML 28Page - IXYS Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 24 / 39 page
background image
LDS8160
© 2009 IXYS Corp.
24
Doc. No. 8160_DS, Rev. N1.0
Characteristics subject to change without notice
Appendix 1
CREATING LUT CORRECTION TABLES FOR LDS8160
LED luminosity (or brightness) is proportional to
forward
current
through
the
device
and
is
dependent on temperature. To maintain a constant
level of luminosity, the forward current should be
adjusted vs. temperature. However, changing the
static forward current also shifts the chromaticity of
the LED, where each white or color LED has a
different dependency with temperature.
The LDS8160 uses Dynamic Dimming control to
change average LED current while maintaining the
peak current thereby causing no color shift. The
LED-Sense
TM
temperature and color correction
algorithm implements this current compensation
feature by adjustment of the PWM duty cycles vs.
the LEDs temperature. The LEDs’ and an internal
chip
diode’s
I-V
characteristics
are
routinely
measured, digitized, and m
apped to ΔPWM code
adjustments stored in three integrated Luminosity
vs. Temperature (LUT) lookup tables. Each LUT is
assigned to one LED bank with two LED current
drivers each. By default, banks A, B, and C are
assigned
to
Blue,
Green,
and
Red
LEDs
respectively. Additionally, the same LUTs can be
used to insure current or power de-rating curve vs.
temperature.
Figure A1.1 shows an
actual Luminosity vs.
Temperature curve of the NSSM038AT-E RGB LED
available from Nichia Corp.
Figure A1.1: Luminosity vs. Temperature curve
(NSSM038AT-E RGB LED from Nichia)
Figure A1.2 shows the total power (combined R, G,
and B diodes) specification and de-rating for this
RGB LED.
Figure A1.2: Total power (combined R, G, and B
diodes) de-rating curve
(NSSM038AT-E RGB LED from Nichia
Assuming that compensation should maintain Relative
Luminosity = 1 in full range of temperatures, the
Compensation curve should be an inversion of the
Luminosity vs. Temperature curve shown at Figure 1
(see Figure A1-3).
Figure A1.3: Relative Luminosity Compensation Curve
(inverse Luminosity vs. Temperature curve)
NSSM038AT-E RGB LED from Nichia
This characteristic must be fitted to the chosen nominal
current at 25
0C. Than the maximum current operating
point is established and it must comply with the
specified temperature de-rating curves for the LEDs.
Figure A1.5 represents LED Current vs. Temperature
curve created for NSSM038AT-E RGB LED with 15ma
chosen as the nominal current at 25
0C, and a
maximum power for the RGB LED of ~ 133mW as
depicted in Figure A1.4 showing the user-selected de-


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39 


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn