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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.