herunterladen
GND
DIM
BOOT
SW
VOUT
RON
LM3406
VIN
D1
L1
C
B
R.35
C
F
R
ON
C
IN2
V
IN
VCC
CS
COMP
C
C
DIM1
C
O
R
PD
DIM2
OFF
C
IN1
Vo/LED+
CS/LED-
Q1
R1.5
R1
R.7
R
OUT
J2
User's Guide
SNVA300A–September 2008–Revised May 2013
AN-1750 LM3406 Evaluation Board
1 Introduction
The LM3406 is a buck regulator controlled current source designed to drive a series string of high power,
high brightness LEDs (HBLEDs) such as the Luxeon™ K2 Emitter at forward currents of up to 1.5A. The
converter's output voltage adjusts as needed to maintain a constant current through the LED array.
Figure 1. Complete Circuit Schematic
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1
SNVA300A–September 2008–Revised May 2013 AN-1750 LM3406 Evaluation Board
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