ILD4035 Datasheet, PDF (22/29 Pages) Infineon Technologies AG – 350 mA LED Driver

ILD4035
350 mA LED Driver
Basic Application Information
R_sense = 303 mΩ, L= 47 μH
V_s = 24 V, 6 LED with typ. V_F = 3 V
I_LED vs. V_Supply and number of LEDs
F_Switch vs. V_Supply and number of LEDs
0.450
0.425
0.400
0.375
0.350
0.325
0.300
0.275
0.250
5
ILED (Rs=303m; L=47uH)
1LED
2LED
3LED
4LED
5LED
6LED
7LED
8LED
9LED
10LED
11LED
10
15
20
25
30
35
40
45
Vs (V)
ILD4035 _ILED_303 m_47u.vsd
4.50E+05
4.00E+05
3.50E+05
3.00E+05
2.50E+05
2.00E+05
1.50E+05
1.00E+05
5
Switching Frequency (Rs=303m; L=47uH)
1LED
2LED
3LED
4LED
5LED
6LED
7LED
8LED
9LED
10LED
11LED
10
15
20
25
30
35
40
45
Vs (V)
ILD4035 _Switching_Frequency_303 m_47u.vsd
Efficiency vs. V_Supply and number of LEDs
Duty Cycle vs. V_Supply and number of LEDs
Efficiency (Rs=303m; L=47uH)
100
95
1LED
2LED
90
3LED
4LED
85
5LED
6LED
80
7LED
8LED
75
9LED
10LED
11LED
70
65
5
10
15
20
25
30
35
40
45
Vs (V)
ILD4035 _Efficiency_303 m_47u.vsd
100%
Duty Cycle (Rs=303m; L=47uH)
90%
80%
70%
60%
1LED
2LED
3LED
4LED
5LED
6LED
7LED
8LED
9LED
10LED
11LED
50%
5
10
15
20
25
30
35
40
45
Vs (V)
ILD4035 _Duty_Cycle_303 m_47u.vsd
Data Sheet
22
Revision 1.0, 2010-11-11