User manual

Bill of Materials

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19 Bill of Materials

Part ID Part Value Mfg Part Number

U1 1A Buck LED Driver NSC LM3404

SO PowerPAD pkg

C1, Input Cap 10 µF, 25V, X5R TDK C3225X5R1E106M

C2, C6 Cap 1 µF, 16V, X5R TDK C1608X5R1C105M

C3, V

BOOST

Cap 0.1 µF, X5R TDK C1608X5R1H104M

C4 Output Cap 10 µF, 25V, X5R (Optional) TDK C3225X5R1E106M

C5, V

RON

Cap 0.01 µF, X5R TDK C1608X5R1H103M

D1, Catch Diode 0.5V

Schottky 2A, 30V

Diodes INC B230

D2 Dual SMT small signal Diodes INC BAV199

L1 33 µH CoilCraft D01813H-333

R1A, R1B 0.62Ω 1% 0.25W 1206 ROHM MCR18EZHFLR620

R2 47.5 kΩ 1% Vishay CRCW08054752F

R3 1.0 kΩ, 1% Vishay CRCW08051001F

R4, R5 1Ω, 1% Vishay CRCW08051R00F

R6 10 kΩ, 1% Vishay CRCW08051002F

Q1 SOT23 PNP Diodes INC MMBT3906

Q4 SOT23-6 N-CH 2.4A, 20V ZETEX ZXMN2A01E6

Q3 SC70-6, P + N Channel Vishay Si1539DL

Test Points Connector Keystone 1502-2

VIN, GND, LED+, LED- Connector Keystone 575-8

JMP-1 Jumper Molex 22-28-4023

J15 50Ω BNC Amphenol 112538

20 Layout

AN-1839 LM3402/LM3404 Fast Dimming and True Constant LED Current SNVA342E–July 2008–Revised April 2013

Evaluation Board

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