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HDJD-J822-SCR00 Datasheet

  • HDJD-J822-SCR00

  • Agilent HDJD-J822-SCR00 Color Management System Feedback Con...

  • 18頁

  • AGILENT   AGILENT

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Agilent HDJD-J822-SCR00
Color Management System
Feedback Controller
Data Sheet
Features
鈥?鈥?0 to 85擄C operation
鈥?I
2
C serial interface
鈥?Robust CMOS-Schmitt input
鈥?CMOS/TTL compatible output
鈥?Multiple color input formats 鈥?/div>
CIE XYZ, Yxy, Yu鈥檝鈥?and RGB
Description
The HDJD-J822 is a CMOS mixed-
signal IC designed to be the
optical feedback controller of an
LED-based lighting system. A
typical system consists of an
array of red, green and blue
LEDs, LED drivers, a tri-color
photosensor that samples the
light output, and the HDJD-J822.
The IC interfaces directly to the
photosensor, processes the color
information and adjusts the light
output from the LEDs until the
desired color is achieved. To
achieve this, the IC integrates a
high-accuracy 10-bit analog-to-
digital converter front-end, a
color data processing logic core,
and a high-resolution 12-bit PWM
output generator.
By employing a feedback system
and the HDJD-J822, the light
output produced by the LED
array maintains its color over
time and temperature. In
addition, the desired color can be
specified using a standard CIE
color space.
In addition, by incorporating a
standard I
2
C serial interface,
specifying the color of the LED
array鈥檚 light output is as simple as
picking the color coordinates
from the CIE color space and
writing several bytes of data to
the device.
The output PWM signals are
connected directly to the LED
drivers as enable signals. The
PWM signals control the on-time
duration of the red, green and
blue LEDs. That duration is
continually adjusted in real-time
to match the light output from the
LED array to the specified,
desired color.
鈥?3-channel analog interface to
color sensor 鈥?X, Y and Z channels
鈥?3-channel 12-bit PWM output 鈥?/div>
Red, Green, and Blue LED channels
鈥?Internal computation of calibration
data
鈥?Internal clock generator
鈥?Internal reference voltage
generator
鈥?Error flag output
鈥?External push-button interface
鈥?Only passive components required
externally
Applications
鈥?Backlighting
鈥?General illumination
鈥?Mood/accent lighting
鈥?Color context sensitive appliances

HDJD-J822-SCR00 產品屬性

  • Avago Technologies

  • LED照明驅動器

  • + 85 C

  • SOIC-24

  • - 40 C

  • Reel

  • 1000

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