Texas Instruments LM3409 Demonstration Board LM3409EVAL/NOPB LM3409EVAL/NOPB 데이터 시트
제품 코드
LM3409EVAL/NOPB
V
ADJ
(V)
I
L
ED
(A)
2.3
1.8
1.4
0.9
0.5
0.0
0.0
0.3
0.5
0.8
1.0
1.3
INPUT VOLTAGE (V)
N
O
R
MAL
IZ
ED
SW
IT
C
H
IN
G
F
R
EQ
U
EN
C
Y
1.7
1.4
1.0
0.7
0.3
0.0
0
14
28
42
56
70
7 LEDs
5 LEDs
3 LEDs
1 LED
INPUT VOLTAGE (V)
I
L
ED
(A)
2.40
2.35
2.30
2.25
2.20
2.15
2.10
20
24
28
32
36
40
44
INPUT VOLTAGE (V)
I
L
ED
(A)
2.5
2.4
2.3
2.2
2.1
2.0
20
32
44
56
68
80
INPUT VOLTAGE (V)
EF
F
IC
IEN
C
Y
(%
)
100
95
90
85
80
75
70
0
10
20
30
40
50
INPUT VOLTAGE (V)
EF
F
IC
IEN
C
Y
(%
)
100
95
90
85
80
75
70
0
20
40
60
80
300856b3
SNVS602J – MARCH 2009 – REVISED MAY 2013
Typical Performance Characteristics (continued)
T
A
= +25°C, V
IN
= 24V, and characteristics are identical for LM3409 and LM3409HV unless otherwise specified.
LM3409 Efficiency vs. Input Voltage
LM3409HV Efficiency vs. Input Voltage
V
O
= 10V (3 LEDs); I
LED
= 2A
(1)
V
O
= 10V (3 LEDs); I
LED
= 2A
(2)
Figure 9.
Figure 10.
LM3409 LED Current vs. Input Voltage
LM3409HV LED Current vs. Input Voltage
V
O
= 17V (5 LEDs)
(3)
V
O
= 17V (5 LEDs)
(4)
Figure 11.
Figure 12.
Amplitude Dimming Using IADJ Pin
Normalized Switching Frequency vs. Input Voltage
V
O
= 17V (5 LEDs); V
IN
= 24V
Figure 13.
Figure 14.
(1)
The measurements were made using the Bill of Materials from Design #3 except the LM3409 was substituted for the LM3409HV.
(2)
The measurements were made using the Bill of Materials from Design #3.
(3)
The measurements were made using the Bill of Materials from Design #3 except the LM3409 was substituted for the LM3409HV.
(4)
The measurements were made using the Bill of Materials from Design #3.
6
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