MCP1643 SYNCHRONOUS BOOST LED
CONSTANT CURRENT REGULATOR
EVALUATION BOARD USER’S GUIDE
2013 Microchip Technology Inc. DS20005196A-page 21
Appendix B. Bill of Materials
TABLE B-1: BILL OF MATERIALS (BOM)
Qty. Reference Description Manufacturer Part Number
1 BT1 Holder Battery AA Polar Protection MPD (Memory Protec-
tion Devices)/Keystone
BHAA-POL
2 C1, C3 Cap. Ceramic 10 UF 10V 10% X7R 0805 Murata Electronics
®
North America
GRM21BR71A106KE51L
7 J1, J2, J3,
J4, J5, J6,
J7
PC Test Point Tin SMD Harwin Plc. S1751-46R
1 L1 Choke, TPC 2828, 4.7UH 20% 1.35A Wurth Elektronik Group 744025004
1 LD1 LED, Hi Bright, 51.7LM, Warm White Cree, Inc. MLEAWT-A1-R250-0004E5
1 R1 Resistor, 1206 0R0 Welwyn Components WCR1206-R005JI
3 R4 Resistor, 0805, 2R4 5%, 0.125W Panasonic - ECG ERJ-6RQF2R4V
1 R6 Resistor, 1M Ohm 1/10W 1% 0603 SMD Panasonic - ECG ERJ-3EKF1004V
1 SW1 2.54 mm SW_SMD_DIP Wurth Elektronik Group 418121270801
1 SW2 1.27 mm SW_SMD_DIP Wurth Elektronik Group 416131160802
2 R2, R3 Resistor, 0805, 4R7 5%, 0.125W Panasonic - ECG ERJ-B3BF4R7V-ND
1 U1 LED Driver, Boost Converter Microchip Technology
Inc.
MCP1643-I/MS
1 BAT1 Battery Lithium AA Cell 1.5 Volt Energizer Battery
Company
L91
1 C2 Cap. Ceramic 10uF 10V 10% X7R 0805 -
DO NOT POPULATE
Murata Electronics
®
North America
GRM21BR71A106KE51L
Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The
released BOM used in manufacturing uses all RoHS-compliant components.
