User manual

8.0 0.0 8.4 16.6 24.8 33.0
V
DIM
(V)
TIME (Ps)
-1.0
2.0
5.0
8.0
11.0
I
LED
(
A
)
-0.1
0.2
0.5
0.8
1.1
I
LED
V
DIM
R1A
Q4
L1
LEDs on separate PCB
Optional
R5
Q3
2
CONN-1
C4
V
DIM
C5
JMP-1
External Voltage
Source Optional
4V to 6V
1N4148
Dual
Single package (SC70-6)
Complementary N+P Channel
D2
Q3
1
R1B
R4
R6
V
DIM
From V
CC
LM3402/04
External MOSFET Dimming and Contrast Ratio www.ti.com
Figure 12. V
IN
= 24V, 3 series LEDs @ 400mA
20
AN-1839 LM3402/LM3404 Fast Dimming and True Constant LED Current SNVA342E–July 2008–Revised April 2013
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