TLE 4241GM Infineon Technologies, TLE 4241GM Datasheet - Page 2

• Manufacturer Part Number: TLE 4241GM
• Manufacturer: Infineon Technologies

Specifications of TLE 4241GM

• Packages: PG-DSO-8
• Topology: Linear
• Vs (min): 4.0 V
• Vs (max): 45.0 V
• Vq (max): 40.0 V
• Iq (max): 70.0 mA

Circuit Description
Figure 1
An internal reference voltage of typ. 1.20 V supplies the REF pin which is connected to
GND via an external resistor. In the SET = H mode the reference current flowing on the
REF pin is mirrored with an amplification to form the desired output current. The typ.
output current in the SET = H mode calculates:
The output current is shown as a function of the reference resistance on
high as well as for the low current mode.
With the PWM input the LED brightness can be regulated via duty cycle. Also PWM = L
sets the TLE 4241 in sleep mode resulting in a very low current consumption of << 1 A
typ. Due to the high impedance of the PWM input (see timing diagram
on
Data Sheet
I
Q typ
,
Page
/mA
12) the PWM pin can thus also be used as an Enable input.
PWM
SET
=
ST
----------------------
R
I
Block Diagram
REF
1.20
/k
487
+
0.1
Regulation
Regulation
Reference
Voltage
GND
High
Low
2
Rev. 1.3, 2007-03-19
I
AEB03003
PWM
TLE 4241 GM
Page 10
Q
REF
versus
for the
V
PWM
(1)