Datasheet

400 ns/DIV
VSNS
100 mV/DIV
VCS
20V/DIV
ILED
100 mA/DIV
400 ns/DIV
VCS
20V/DIV
ILED with 1 PF C3 installed
100 mA/DIV
ILED
100 mA/DIV
www.ti.com Bill of Materials
8 Bill of Materials
Table 4. Bill of Materials
Ref. # Description Part Number Size Vendor
IC1 LED Controller LM3401 VSSOP-8 Texas Instruments
L1 68 uH, 1.7A, Inductor MSS1260T-683ML 12 × 12 Coilcraft
Q1 40V, 1.8A, 100 mΩ, PFET Si2319DS SOT-23 Vishay
D1 40V, 2A, Schottky SSA24 SMA Vishay
C1 50V, 2.2 µF, ceramic C3225X5R1H225K 1210 TDK
C2 50V, 33 µF, electrolytic EEEHA1H330XP 6.6 × 6.6 Panasonic
C3* Not installed - 1206 -
R1 0.59Ω, 1%, 1/4W SR732BLTER590F 1206 KOA
R2 5.76 kΩ, 1% CRCW08055761F 0805 Vishay
R3 24.9 kΩ1% CRCW08052492F 0805 Vishay
9 Typical Performance Characteristics
Unless otherwise specified, the following conditions apply: Vin = 24V, Ta = 25°C, LED = 2 × Osram
Golden Dragon (Vf = 3.4V, If = 350 mA)
Figure 3. CS, SNS, and LED Current Waveforms Figure 4. ILED with and without C3
5
SNVA254C–August 2007–Revised April 2013 AN-1657 LM3401 Demo Board
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