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參數(shù)資料
| 型號： | TLE4242G |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | LED驅(qū)動器 |
| 英文描述： | Adjustable LED Driver |
| 中文描述： | 可調(diào)LED驅(qū)動器 |
| 文件頁數(shù)： | 2/13頁 |
| 文件大?。?/td> | 270K |
| 代理商： | TLE4242G |
Data Sheet
2
Rev. 1.0, 2004-01-01
TLE 4242 G
Circuit Description
Figure 1
Block Diagram
An external shunt resistor in the ground path of the connected LEDs is used to sense the
LED current. A regulation loop helds the voltage drop at the shunt resistor on a constant
level of typ. 177 mV. Selecting the shunt resistance permits to adjust the appropriate
constant current level. The typ. output current calculates
(1)
where
V
REF
is the reference voltage with a typical level of 177 mV (see
Page 10
). The
equation applies in a range of 0.39
≤
R
REF
≤
1.8
.
The output current is shown as a function of the reference resistance on
Page 10
. With
the PWM input the LED brightness can be regulated via duty cycle. Also PWM = L sets
the TLE 4242 in sleep mode resulting in a very low current consumption of << 1
μ
A typ.
Due to the high impedance of the PWM input (see
“PWM Pin Input Current versus
PWM Voltage” on Page 11
) the PWM pin can thus also be used as an enable input.
AEB03500.VSD
Bandgap
Reference
Bias Supply
Comparator
Status
Delay
4
GND
D
6
3
ST
5
REF
7
Q
I
1
PWM
2
I
Q typ
,
V
R
REF
------------
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TLE4242G_07 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:Adjustable LED Driver Wide input voltage range up to 42 V Low drop voltage |
| TLE4242GATMA1 | 制造商:Infineon Technologies AG 功能描述:LED DRVR 3Segment 5V/9V/12V/15V/18V/24V 8-Pin(7+Tab) TO-263 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 D2PAK |
| TLE4242GATMA2 | 制造商:Infineon Technologies AG 功能描述:TLE4242GATMA2 |
| TLE4242GNT | 制造商:Infineon Technologies AG 功能描述:LED DRVR 3Segment 5V/9V/12V/15V/18V/24V 8-Pin(7+Tab) TO-263 |
| TLE4242GT | 制造商:Infineon Technologies AG 功能描述:LED DRVR 3Segment 5V/9V/12V/15V/18V/24V 8-Pin(7+Tab) TO-263 |
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