Texas Instruments LM3423 Evaluation Board LM3423BBLSCSEV/NOPB LM3423BBLSCSEV/NOPB Datenbogen
Produktcode
LM3423BBLSCSEV/NOPB
I
CSH
(
éA)
I
L
ED
(A)
1.0
0.8
0.6
0.4
0.2
0.0
0
20
40
60
80
100
DUTY CYCLE (%)
I
L
ED
(A)
25 kHz
1 kHz
100
80
60
40
20
0
0.8
0.2
0.4
0.6
0.8
1.0
V
IN
(V)
I
L
ED
(A)
1.010
1.005
1.000
0.995
0.990
5
10
15
20
25
30
V
IN
(V)
I
L
ED
(A)
1.02
1.01
1.00
0.99
0.98
0
16
32
48
64
80
V
IN
(V)
EF
F
IC
IEN
C
Y
(%
)
100
95
90
85
80
10
15
20
25
30
V
IN
(V)
EF
F
IC
IEN
C
Y
(%
)
100
95
90
85
80
75
70
0
16
32
48
64
80
SNVS574E – JULY 2008 – REVISED MAY 2013
Typical Performance Characteristics
T
A
=+25°C and V
IN
= 14V unless otherwise specified
Boost Efficiency vs. Input Voltage
Buck-Boost Efficiency vs. Input Voltage
V
O
= 32V (9 LEDs)
(1)
V
O
= 21V (6 LEDs)
(2)
Figure 4.
Figure 5.
Boost LED Current vs. Input Voltage
Buck-Boost LED Current vs. Input Voltage
V
O
= 32V (9 LEDs)
(1)
V
O
= 21V (6 LEDs)
(2)
Figure 6.
Figure 7.
Analog Dimming
PWM Dimming
V
O
= 21V (6 LEDs); V
IN
= 24V
(2)
V
O
= 32V (9 LEDs); V
IN
= 24V
(1)
Figure 8.
Figure 9.
(1)
The measurements were made using the standard boost evaluation board from
(2)
The measurements were made using the standard buck-boost evaluation board from .
8
Copyright © 2008–2013, Texas Instruments Incorporated
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