TLE 4242G Infineon Technologies, TLE 4242G Datasheet - Page 4

• Manufacturer Part Number: TLE 4242G
• Manufacturer: Infineon Technologies

Specifications of TLE 4242G

• Packages: PG-TO263-7
• Topology: Linear
• Vs (min): 4.5 V
• Vs (max): 24.0 V
• Vq (max): 40.0 V
• Iq (max): 500.0 mA

Application Information
Figure 3
Figure 3
driven with an adequate supply current adjusted by the resistor
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 minimum supply voltage
calculates as the sum of the LED forward voltages, the TLE 4242 G drop voltage (max.
0.7 V at a LED current of 300 mA) and the max. voltage drop at the shunt resistor
of max. 185 mV.
The status output of the LED driver (ST) detects an open load condition enabling to
supervise correct LED function. A LED failure is detected if the voltage drop at the shunt
resistor
a delay time adjustable via an optional capacitor connected to the pin D.
Data Sheet
V
BAT
R
shows a typical application with the TLE 4242 G LED driver. The 3 LEDs are
REF
falls below typ. 25 mV. In this case the status output pin ST is set low after
I
Application Circuit
RADJ
TLE 4269 G
GND
100
nF
D
RO
SI
Q
µF
10
4
10 k
I
Ω
GND
ST
TLE 4242 G
47 nF
µC
PWM
D
REF
R
Q
REF
0.47
0.25 W
Rev. 1.1, 2007-03-20
. Thus brightness
Ω
AEA03499.VSD
TLE 4242 G
R
REF
LED
Dragon
R
REF