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參數資料
| 型號： | HDJD-J822 |
| 英文描述： | Agilent HDJD-J822-SCR00 Color Management System Feedback Controller |
| 中文描述： | 安捷倫HDJD - J822 - SCR00色彩管理系統反饋控制器 |
| 文件頁數： | 1/18頁 |
| 文件大小： | 118K |
| 代理商： | HDJD-J822 |
Agilent HDJD-J822-SCR00
Color Management System
Feedback Controller
Data Sheet
Features
–40 to 85
°
C operation
I
2
C serial interface
Robust CMOS-Schmitt input
CMOS/TTL compatible output
Multiple color input formats –
CIE XYZ, Yxy, Yu’v’ and RGB
3-channel analog interface to
color sensor – X, Y and Z channels
3-channel 12-bit PWM output –
Red, Green, and Blue LED channels
Internal computation of calibration
data
Internal clock generator
Internal reference voltage
generator
Error flag output
External push-button interface
Only passive components required
externally
Applications
Backlighting
General illumination
Mood/accent lighting
Color context sensitive appliances
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’s 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.
相關PDF資料 |
PDF描述 |
|---|---|
| HDJD-J822-SCR00 | Agilent HDJD-J822-SCR00 Color Management System Feedback Controller |
| HDJD-S831-QT333 | Color Sensor Module |
| HDM-1210BD | 12-Bit Digital-to-Analog Converter |
| HDM-1210SD | 12-Bit Digital-to-Analog Converter |
| HDM-1210SDB | 12-Bit Digital-to-Analog Converter |
相關代理商/技術參數 |
參數描述 |
|---|---|
| HDJD-J822-SCR00 | 功能描述:LED照明驅動器 Color Controller RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
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| HDJD-JD01 | 制造商:Avago Technologies 功能描述:HDJD-JD01 - Bulk |
| HDJD-JD02 | 功能描述:光學傳感器開發工具 RGB Sensor Kit RoHS:否 制造商:ams 工具用于評估: 接口類型: 最大工作溫度: |
| HDJD-JD05 | 功能描述:光學傳感器開發工具 RGB DCS QFN Kit RoHS:否 制造商:ams 工具用于評估: 接口類型: 最大工作溫度: |
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