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參數(shù)資料
| 型號： | MLX10803KDC |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | High power LED driver |
| 中文描述： | 高功率LED驅(qū)動器 |
| 文件頁數(shù)： | 21/25頁 |
| 文件大小： | 479K |
| 代理商： | MLX10803KDC |
IC specification
MLX10803
High power LED driver
3901010803 Page 21/25
Data Sheet
Rev 025 2/OCT/07
8.
In normal mode the peak current threshold voltage is defined by the lowest voltage on pins VREF, IREF2 and
IREF1. Usually the resistor connected to IREF2 pin has a small thermal coefficient and the resistor on IREF1 pin
has a big negative temperature coefficient (but they also can be connected vice versa). Both of these pins have an
output current of 50
μ
A. When the voltage on pin IREF1 falls below the voltage on pin IREF2 or VREF, the voltage
reference for the actual maximum current is taken from pin IREF1. This makes the value of the peak current
sensitive to temperature and prevents overheating of LED or IC. When the voltage on pin IREF1 becomes higher
than voltage on IREF2 or VREF, the reference switches back to IREF2 or VREF pin.
The thermal behaviour of the system should be characterised during the design-in of the product by the user.
For a system that is designed for thermal conditions, temperature down regulation may not be needed. In this case,
It is enough to leave the IREF1 or IREF2 pin unconnected and the internal current source will pull it up to the
voltage Vdd – 0.7V.
System behaviour can be configured to compensate the dependency of LED light output versus temperature. The
example of such compensation is depicted below.
Illustration of a possible temperature regulation
Temperature regulation
R
°
C
R
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| MLX10803KDC-AAA-000-RE | 功能描述:IC LED DRVR HP CONST CURR 8-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅(qū)動器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 恒定電流:- 恒定電壓:- 拓?fù)?PWM，切換式電容器（充電泵） 輸出數(shù):1 內(nèi)部驅(qū)動器:是 類型 - 主要:背光 類型 - 次要:白色 LED 頻率:642kHz 電源電壓:2.7 V ~ 5.5 V 輸出電壓:5V 安裝類型:表面貼裝 封裝/外殼:10-VFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-VSON 包裝:剪切帶 (CT) 工作溫度:-30°C ~ 85°C 產(chǎn)品目錄頁面:1371 (CN2011-ZH PDF) 其它名稱:BD1603NUV-E2CT |
| MLX10803KDC-AAA-000-TU | 制造商:Melexis Semiconductors 功能描述:IC LED DRIVER HP 8SOIC |
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