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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)： | 20/25頁 |
| 文件大?。?/td> | 479K |
| 代理商： | MLX10803KDC |
IC specification
MLX10803
High power LED driver
3901010803 Page 20/25
Data Sheet
Rev 025 2/OCT/07
7.3.
Switching frequency considerations and constant light output
As already shown, the switching frequency depends on the peak current as well as on the monoflop time for a given
coil. Furthermore it depends on the coil inductance itself.
Due to the principle of switch mode power supplies, the current through the LED is kept constant for any
supply change. The parameter that changes in order to keep the current constant is the switching
frequency itself. The lower the supply voltage, the lower the switching frequency. Furthermore, the supply
current is affected by supply changes: with an increasing supply voltage the average supply current decreases.
The graph below shows the normalised luminous flux versus the power supply for a standard application with one
white Luxeon III LED driven at 750mA. The parameters are optimised for the 24V board net.
The luminous flux at 24V has been set to 100%. The graph indicates that the light output is minimally dependent on
supply changes over the whole range from 16 to 32V.
MLX10803
Normalized luminous flux
Θ
v/
Θ
v
(24V)
vs. supply voltage
Θ
v/
Θ
v
(24V)
=f(V
BAT
)
80.00
85.00
90.00
95.00
100.00
105.00
110.00
115.00
120.00
16
18
20
22
24
26
28
30
32
V
BAT
[V]
Θ
v
Θ
v
(
Iled=750mA, fsw=70kHz (@24V)
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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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