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PDF TLE4242G Data sheet ( Hoja de datos )
| Número de pieza | TLE4242G | |
| Descripción | Adjustable LED Driver | |
| Fabricantes | Infineon Technologies AG | |
| Logotipo |  |
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Adjustable LITIXTM Linear
TLE 4242 G
Features
• Adjustable constant current up to 500 mA (±5%)
• Wide input voltage range up to 42 V
• Low drop voltage
• Open load detection
• Overtemperature protection
• Short circuit proof
• Reverse polarity proof
• Wide temperature range: -40 °C to 150 °C
• Green Product (RoHS compliant)
• AEC Qualified
P-TO263-7-1
Functional Description
The TLE 4242 G is an integrated adjustable constant current source driving loads up to
500 mA. The output current level can be adjusted via an external resistor. The IC is
designed to supply high power LEDs (e.g. Osram Dragon LA W57B) under the severe
conditions of automotive applications resulting in constant brightness and extended LED
lifetime. It is provided in the surface mounted PG-TO263-7-1 package. Protection circuits
prevent damage to the device in case of overload, short circuit, reverse polarity and
overheat. The connected LEDs are protected against reverse polarity as well as excess
voltages up to 45 V.
The integrated PWM input of the TLE 4242 G permits LED brightness regulation by
pulse width modulation. Due to the high input impedance of the PWM input the LITIXTM
Linear can be operated as a protected high side switch.
Type
TLE 4242 G
Data Sheet
Package
PG-TO263-7-1
1
Rev. 1.1, 2007-03-20
1 page  
TLE 4242 G
The functionality of the ST and PWM as well as their timings are shown in Figure 4. The
Status delay can be adjusted via the capacitor connected to the timing Pin D. The delay
time scales in linear way with the capacitance CD:
tSTHL,typ = 4----7C-----nD---F-- × 10 ms
tSTLH,typ = 4----7C-----nD---F-- × 10 μs
(2)
VI Open
Load
VPWM
VPWM, H
VPWM, L
IQ
mA
256
VD
VUD
VLD
VST
t
tPWM, ON
tPWM, OFF
t
tSTHL
t
t
VSTL
Figure 4 Function and Timing Diagram
Data Sheet
5
t
AET03505.VSD
Rev. 1.1, 2007-03-20
5 Page 
TLE 4242 G
PWM Pin Input Current versus
PWM Voltage
2.0
IPWM mA
AED03502.VSD
1.5
PWM Pin Input Current versus
PWM Voltage
400
IPWM µA
AED03501.VSD
300
1.0 200
0.5 100
0 0 5 10 15 20 25 30 V 40
VPWM
00 1 2 3 4 5 6 7 V8
VPWM
Data Sheet
11 Rev. 1.1, 2007-03-20
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet TLE4242G.PDF ] | |
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