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參數(shù)資料
| 型號(hào)： | TLE4241 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | LED驅(qū)動(dòng)器 |
| 英文描述： | LED Driver with Adjustable Current |
| 中文描述： | LED驅(qū)動(dòng)電流可調(diào) |
| 文件頁(yè)數(shù)： | 4/15頁(yè) |
| 文件大?。?/td> | 217K |
| 代理商： | TLE4241 |
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Data Sheet
4
Rev. 1.2, 2004-04-13
TLE 4241 GM
Application Information
Figure 3
Application Circuit
Figure 3
shows a typical application with the TLE 4241 GM LED driver. The 3 LEDs are
driven with an adequate supply current adjusted by the resistor
R
REF
. Thus brightness
variations due to forward voltage spread of the LEDs are prevented. The luminosity
spread arising from the LED production process can be compensated via software by an
appropriate duty cycle applied to the PWM pin. Hence selection of the LEDs to forward
voltage as well as to luminosity classes can be spared. The slightly negative temperature
coefficient of the TLE 4241 GM output current protects the LEDs against over-
temperature stress if the IC is placed nearby the LEDs.
The voltage drop (
V
I
-
V
Q
) across the TLE 4241 GM is monitored in order to detect an
open load condition indicated at the status output pin ST. In case of open load, the
voltage drop will decrease below the lower status switching threshold
V
dr,L
. Hence, the
status output ST will be driven low. In normal operation, the voltage drop is above the
upper status threshold
V
dr,H
, thus the open collector output ST is in high-ohmic state (see
also section Status Output at the Electrical Characteristics).
The function of ST, SET and PWM as well as their timings are shown in
Figure 4
.
AED03098
TLE 4241G
REF
R
μC
SET
PWM
ST
TLE 4271
WD
R
Q
V
I
Q
Batt
V
LA E67B
OSRAM
W
RO
22 μF
100 nF
10 k
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| TLE4271-2 | 5-V Low-Drop Fixed Voltage Regulator |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TLE4241GM | 功能描述:LED照明驅(qū)動(dòng)器 LED DRIVERS 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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| TLE4241GM_07 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:LED Driver with Adjustable Current |
| TLE4241GMFUMA1 | 制造商:Infineon Technologies AG 功能描述:LED DRVR 3Segment 5V/9V/12V/15V/18V/24V 8-Pin DSO 制造商:Infineon Technologies AG 功能描述:MC RELAY + LED - Tape and Reel 制造商:Infineon Technologies AG 功能描述:IC LED DRIVER LINEAR DSO-8 |
| TLE4241GMNT | 制造商:Infineon Technologies AG 功能描述:LASER DIODE/LED DRIVER, 8 Pin, Plastic, SOP |
| TLE4242G | 功能描述:LED照明驅(qū)動(dòng)器 LED Drivers 42 V 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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
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