Texas Instruments LM3429 Evaluation Boards LM3429BSTEVAL/NOPB LM3429BSTEVAL/NOPB Datenbogen
Produktcode
LM3429BSTEVAL/NOPB
DUTY CYCLE (%)
I
LED
(
A
)
1.0
0.8
0.6
0.4
0.2
0.0
0
20
40
60
80
100
100 Hz
500 Hz
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
V
IN
(V)
I
LED
(
A
)
1.00
0.99
0.98
0.97
0.96
5
10
15
20
25
30
V
IN
(V)
I
L
ED
(
A
)
1.05
1.03
1.01
0.99
0.97
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
SNVS616G – APRIL 2009 – 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
= 20V (6 LEDs)
(2)
Figure 3.
Figure 4.
Boost LED Current vs. Input Voltage
Buck-boost LED Current vs. Input Voltage
V
O
= 32V (9 LEDs)
(1)
V
O
= 20V (6 LEDs)
(2)
Figure 5.
Figure 6.
Analog Dimming
PWM Dimming
V
O
= 20V (6 LEDs)
(2)
V
O
= 20V (6 LEDs)
(2)
Figure 7.
Figure 8.
(1)
The measurements were made using the standard boost evaluation board from AN-1986 (
(2)
The measurements were made using the standard buck-boost evaluation board from AN-1985 (
6
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