User manual
I
LED
(A)
V
DIM
(V)
400 és/DIV
V
DIM
4
2
0
0.0
0.5
1.0
I
LED
I
LED
(A)
V
DIM
(V)
2 és/DIV
V
DIM
4
2
0
0.0
0.5
1.0
I
LED
Typical Waveforms
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7 Typical Waveforms
T
A
= +25°C, V
IN
= 24V and V
O
= 21V.
Figure 5. 1kHz 50% PWM DIMMING Figure 6. 1kHz 50% PWM DIMMING (Rising Edge)
TP5 dim voltage (V
DIM
) TP5 dim voltage (V
DIM
)
LED current (I
LED
) LED current (I
LED
)
12
AN-2010 LM3423 Buck-Boost 2 Layer Evaluation Board SNVA415C–June 2010–Revised May 2013
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