DKSB1003A

DKSB1003A LM3406HV Evaluation Board Rev B 18 June 2013 Features • • • • • • 3 user selectable LED constant current drive levels Input voltage range 6V-75V External connections using solderless terminal blocks Dimming pin brought out to solderless terminal block for easy access Output open-circuit protected Small board footprint Quick Start Connect DC power to TB1-VIN (6V – 75V) and ground to TB1-GND. Attach LED anode to TB2-LED+ and cathode to TB2-LED-. Remove jumper from header J1 for a regulated output current of 360mA. Functional Description The LM3406HV evaluation board provides a means of evaluating the LM3406HV over its operating voltage range at user selectable LED drive currents. Output drive current options of 360mA, 750mA, and 1.5A are jumper selectable. Solderless terminal block connections are provided for power-in, constant current out, and dimming control. The power-in and ground connections are made at terminal block TB1, labeled on the board as VIN and GND. The LM3406 DIM pin is brought out at TB3-DIM. TB3-V+ and TB3-GND are connected to TB1-VIN and TB1-GND respectively, and can be used to power user supplied dimming circuitry. Rev B 6/13 Page 1 of 4 LM3406HV Evaluation Board Jumper J1 determines the output current by changing the sense resistance. With the jumper removed, the LED drive current is 360mA, with R3 being the singular sense resistor. A jumper positioned across header pins J1-1 and J1-2 parallels R2 with R3, providing an LED drive current of 750mA. Repositioning the jumper to J1-2 and J1-3 parallels R3 with R4 for a LED drive current of 1.5A. The evaluation board is not optimized for any particular input/output combination. Various design characteristics can and should be optimized for a specific application. Refer to the National Semiconductor LM3406 datasheet for information regarding component values for a particular application. Another source of information is National Semiconductor’s Application Note 1750. Layout Bill of Materials Part C1 C2 C3 C4 C5 C6 D1 D2 J1 L1 R1 R2 R3 R4 TB1 TB2 TB3 U1 Digi-Key PN 399-1094-1-ND 587-1778-1-ND 445-4468-1-ND 311-1141-1-ND BAS20TPMSCT-ND SS2H10-E3/52TGICT-ND WM6503-ND 445-3565-1-ND RMCF1/10124KFRCT-ND RHM.51QCT-ND RHM.56QCT-ND RHM.18QCT-ND A98333-ND A98334-ND LM3406HVMH-ND Digi-Key Corporation Description CAP 22000PF 25V CERAMIC X7R 0603 CAP CER 2.2UF 100V X7R 10% 1210 CAP CER 1.0UF 100V X7R 20% 1206 CAP .10UF 25V CERAMIC X7R 0805 DIODE SWITCH SW 200V 200MA SOT23 DIODE SCHOTTKY POWER 2A 100V SMB CONN HEADER 3POS .100 VERT GOLD INDUCTOR POWER 33UH 2.1A SMD RES 124K OHM 1/8W 1% 0805 SMD RES .51 OHM 1/4W 1% 1206 SMD RES .56 OHM 1/4W 1% 1206 SMD RES .18 OHM 1/4W 1% 1206 SMD TERM BLOCK 2POS SIDE ENT 2.54MM TERM BLOCK 3POS SIDE ENT 2.54MM IC REG BUCK 1.5A CC LED 14TSSOP Rev B 6/13 Manufacturer PN C0603C223K3RACTU HMK325B7225KN-T C3216X7R2A105M CC0805KRX7R8BB104 BAS20-TP SS2H10-E3/52T 22-28-4033 VLF10040T-330M2R1 RMCF 1/10 124K 1% R MCR18EZHFLR510 MCR18EZHFLR560 MCR18EZHFLR180 282834-2 282834-3 LM3406HVMH/NOPB Page 2 of 4 Digi-Key Corporation 1 2 TB1 1 2 VIN GND C2 2.2uF C3 2.2uF C5 0.1uF R1 124K 14 13 12 10 4 9 7 VIN BOOT VIN SW1 VINS SW1 RON VOUT NC CS COMP VCC GND DIM U1 3 1 2 5 6 11 8 C6 0.1uF C1 0.022uF SS2H10-E3/52T D2 33uH L1 BAS21,215 D1 C4 1.0uF R4 0.18 R3 0.56 Rev B 6/13 1 2 3 DIM V+ GND R2 0.51 LED+ LED- 1 2 3 1 2 3 J1 1 2 1 2 3 TB3 1 2 TB2 LM3406HV Evaluation Board Schematic Page 3 of 4 LM3406HV Evaluation Board Disclaimer This document is for informational use only and is subject to change without prior notice. 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No permission is granted to the user to copy, print, store, distribute, transmit, display in public or modify the content of this document in any way for any other purpose. © Copyright 2013 Digi-Key Corporation. All rights reserved. Digi-Key Corporation Rev B 6/13 Page 4 of 4