ILD2035 Infineon Technologies, ILD2035 Datasheet - Page 17

• Manufacturer Part Number: ILD2035
• Manufacturer: Infineon Technologies
• Type: Buckr

Specifications of ILD2035

• Packages: SC74
• Vs (min): 8.0 V
• Vs (max): 22.0 V
• Iout (typ): 350.0 mA
• Iout (max): 400.0 mA

6.1.1
ILD2035 incorporates a temperature protection circuit referring to the junction temperature of the IC. The higher
the junction temperature the lower the current of the LEDs. This feature helps to reduce the power dissipation of
ILD2035 and the LEDs. Yet still the product specific maximum ratings for the junction temperature need to be
observed to avoid a permanent damage of the devices.
ILD2035 has been characterized on ILD4035/4001 application board heated from the backside without additional
air flow on the circuit board surface besides natural convection. The size and layout of the circuit board as well as
the air flow around it influence the thermal resistance junction to ambient
temperature. Below figures show the LED current versus soldering point temperature
LED current versus
6.2
For all shown parameters ILD2035 has been measured at
Data Sheet
0.35
0.25
0.15
0.05
0.4
0.3
0.2
0.1
0
40
303 mΩ, 100 μH
333 mΩ, 100 μH
Temperature Protection Circuit
Switching Parameters
50
60
T
S
70
,
V
S
80
= 12 V
T
S
[°C ]
600 mΩ, 100 μH
1200 mΩ, 220 μH
90
100
110
120
130
17
LED current (relative) versus
T
A
110
100
90
80
70
= 25 °C. Used LEDs have a typical
40
303 mΩ, 100 μH
333 mΩ, 100 μH
50
350 mA Step Down LED Driver
60
R
thJA
70
of ILD2035 and thus its junction
Basic Application Information
80
T
S
T
[°C ]
600 mΩ, 100 μH
1200 mΩ, 220 μH
S
Revision 1.0, 2011-08-17
.
T
90
S
,
V
100
S
= 12 V
V
110
fLED
ILD2035
of 3 V.
120
130