MCP1664 LED Driver Evaluation Board User's Guide

MCP1664
LED Driver
Evaluation Board
User’s Guide
 2015 Microchip Technology Inc.
DS50002363A
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ISBN: 978-1-63277-376-0
QUALITY MANAGEMENT SYSTEM
CERTIFIED BY DNV
== ISO/TS 16949 ==
DS50002363A-page 2
Microchip received ISO/TS-16949:2009 certification for its worldwide
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and India. The Company’s quality system processes and procedures
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and manufacture of development systems is ISO 9001:2000 certified.
 2015 Microchip Technology Inc.
Object of Declaration: MCP1664 LED Driver Evaluation Board
 2015 Microchip Technology Inc.
DS50002363A-page 3
MCP1664 LED Driver Evaluation Board User’s Guide
NOTES:
DS50002363A-page 4
 2015 Microchip Technology Inc.
MCP1664 LED DRIVER
EVALUATION BOARD
USER’S GUIDE
Table of Contents
Preface ........................................................................................................................... 7
Introduction............................................................................................................ 7
Document Layout .................................................................................................. 7
Conventions Used in this Guide ............................................................................ 8
Recommended Reading........................................................................................ 9
The Microchip Web Site ........................................................................................ 9
Customer Support ................................................................................................. 9
Document Revision History ................................................................................... 9
Chapter 1. Product Overview
1.1 Introduction ................................................................................................... 11
1.2 MCP1664 Short Overview ............................................................................ 11
1.3 What is the MCP1664 LED Driver Evaluation Board? ................................. 12
1.4 Contents of the MCP1664 LED Driver Evaluation Board ............................. 12
Chapter 2. Installation and Operation
2.1 Introduction ................................................................................................... 13
2.2 Features ....................................................................................................... 13
2.3 Getting Started ............................................................................................. 14
Appendix A. Schematic and Layouts
A.1 Introduction .................................................................................................. 21
A.2 Board – Schematic ....................................................................................... 22
A.3 Board – Top Silk .......................................................................................... 23
A.4 Board – Top Copper and Silk ....................................................................... 23
A.5 Board – Bottom Copper and Silk ................................................................ 23
Appendix B. Bill of Materials (BOM)
Worldwide Sales and Service .................................................................................... 28
 2015 Microchip Technology Inc.
DS50002363A-page 5
MCP1664 LED Driver Evaluation Board User’s Guide
NOTES:
DS50002363A-page 6
 2015 Microchip Technology Inc.
MCP1664 LED DRIVER
EVALUATION BOARD
USER’S GUIDE
Preface
NOTICE TO CUSTOMERS
All documentation becomes dated, and this manual is no exception. Microchip tools and
documentation are constantly evolving to meet customer needs, so some actual dialogs
and/or tool descriptions may differ from those in this document. Please refer to our web site
(www.microchip.com) to obtain the latest documentation available.
Documents are identified with a “DS” number. This number is located on the bottom of each
page, in front of the page number. The numbering convention for the DS number is
“DSXXXXXXXXA”, where “XXXXXXXX” is the document number and “A” is the revision level
of the document.
For the most up-to-date information on development tools, see the MPLAB® IDE online help.
Select the Help menu, and then Topics to open a list of available online help files.
INTRODUCTION
This chapter contains general information that will be useful to know before using the
MCP1664 LED Driver Evaluation Board. Items discussed in this chapter include:
•
•
•
•
•
•
Document Layout
Conventions Used in this Guide
Recommended Reading
The Microchip Web Site
Customer Support
Document Revision History
DOCUMENT LAYOUT
This document describes how to use the MCP1664 LED Driver Evaluation Board as a
development tool. The manual layout is as follows:
• Chapter 1. “Product Overview” – Important information about the MCP1664
LED Driver Evaluation Board.
• Chapter 2. “Installation and Operation” – Includes instructions on how to get
started with this user’s guide and a description of the user’s guide.
• Appendix A. “Schematic and Layouts” – Shows the schematic and layout
diagrams for the MCP1664 LED Driver Evaluation Board.
• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the
MCP1664 LED Driver Evaluation Board.
 2015 Microchip Technology Inc.
DS50002363A-page 7
MCP1664 LED Driver Evaluation Board User’s Guide
CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:
DOCUMENTATION CONVENTIONS
Description
Arial font:
Italic characters
Initial caps
Quotes
Underlined, italic text with
right angle bracket
Bold characters
N‘Rnnnn
Text in angle brackets < >
Courier New font:
Plain Courier New
Represents
Referenced books
Emphasized text
A window
A dialog
A menu selection
A field name in a window or
dialog
A menu path
MPLAB® IDE User’s Guide
...is the only compiler...
the Output window
the Settings dialog
select Enable Programmer
“Save project before build”
A dialog button
A tab
A number in verilog format,
where N is the total number of
digits, R is the radix and n is a
digit.
A key on the keyboard
Click OK
Click the Power tab
4‘b0010, 2‘hF1
Italic Courier New
Sample source code
Filenames
File paths
Keywords
Command-line options
Bit values
Constants
A variable argument
Square brackets [ ]
Optional arguments
Curly brackets and pipe
character: { | }
Ellipses...
Choice of mutually exclusive
arguments; an OR selection
Replaces repeated text
Represents code supplied by
user
DS50002363A-page 8
Examples
File>Save
Press <Enter>, <F1>
#define START
autoexec.bat
c:\mcc18\h
_asm, _endasm, static
-Opa+, -Opa0, 1
0xFF, ‘A’
file.o, where file can be
any valid filename
mcc18 [options] file
[options]
errorlevel {0|1}
var_name [,
var_name...]
void main (void)
{ ...
}
 2015 Microchip Technology Inc.
Preface
RECOMMENDED READING
This user's guide describes how to use the MCP1664 LED Driver Evaluation Board.
Other useful documents are listed below. The following Microchip documents are
available and recommended as supplemental reference resources.
• MCP1664 Data Sheet – “High-Voltage Step-Up LED Driver with UVLO and
Open Load Protection” (DS20005408)
This data sheet provides detailed information regarding the MCP1664 LED Driver device.
• MCP1663 Data Sheet – “High-Voltage Integrated Switch PWM Boost
Regulator with UVLO” (DS20006506)
This data sheet provides detailed information about the MCP1663 High-Voltage
Integrated Switch PWM Boost Regulator with UVLO device.
THE MICROCHIP WEB SITE
Microchip provides online support via our web site at www.microchip.com. This web site
is used as a means to make files and information easily available to customers. Accessible
by using your favorite Internet browser, the web site contains the following information:
• Product Support – Data sheets and errata, application notes and sample
programs, design resources, user’s guides and hardware support documents,
latest software releases and archived software
• General Technical Support – Frequently Asked Questions (FAQs), technical
support requests, online discussion groups, Microchip consultant program
member listing
• Business of Microchip – Product selector and ordering guides, latest Microchip
press releases, listing of seminars and events, listings of Microchip sales offices,
distributors and factory representatives
CUSTOMER SUPPORT
Users of Microchip products can receive assistance through several channels:
•
•
•
•
Distributor or Representative
Local Sales Office
Field Application Engineer (FAE)
Technical Support
Customers should contact their distributor, representative or field application engineer
(FAE) for support. Local sales offices are also available to help customers. A listing of
sales offices and locations is included in the back of this document.
Technical support is available through the web site at:
http://www.microchip.com/support.
DOCUMENT REVISION HISTORY
Revision A (May 2015)
• Initial Release of this Document.
 2015 Microchip Technology Inc.
DS50002363A-page 9
MCP1664 LED Driver Evaluation Board User’s Guide
NOTES:
DS50002363A-page 10
 2015 Microchip Technology Inc.
MCP1664 LED DRIVER
EVALUATION BOARD
USER’S GUIDE
Chapter 1. Product Overview
1.1
INTRODUCTION
This chapter provides an overview of the MCP1664 LED Driver Evaluation Board and
covers the following topics:
• MCP1664 Short Overview
• What is the MCP1664 LED Driver Evaluation Board?
• Contents of the MCP1664 LED Driver Evaluation Board
1.2
MCP1664 SHORT OVERVIEW
The MCP1664 is a compact, battery-operated, fixed-frequency, step-up DC-DC
converter optimized as LED constant current generator. This product provides an
easy-to-use power supply solution with a minimum number of external components for
applications powered by two-cell or three-cell alkaline, NiCd or NiMH batteries, one-cell
Li-Ion or Li-Polymer batteries.
The MCP1664 is a PWM-only device that operates at a fixed 500 kHz switching
frequency. The device has an operating input voltage range from 2.4V to 5.5V (with an
undervoltage of 2.3V to start and 1.85V to stop). The reference voltage is only 300 mV
in order to minimize the losses on the sense resistor and to increase the overall
efficiency of the application.
The LED can be turned on and off with a variable duty cycle applied to the EN pin for
applications that require current dimming. Compared to its counterpart, the MCP1663
which is designed to be a voltage source, the start-up time for the MCP1664 has been
decreased in order to obtain better performance in dimming applications.
The MCP1664 can supply up to 200 mA of current for a string of four LEDs
(considering a LED Forward Voltage of 3V) from a 3V or higher input voltage source.
More detailed information regarding the current capabilities of the MCP1664 are
available in the data sheet.
In order to provide a compact solution, the device is available in a small 5-Lead SOT-23
and an 8-Lead 2x3 TDFN package.
L
4.7 µH
VIN = 2.4V - 5.5V
CIN
4.7 - 20 µF
VIN
MCP1664
VFB
EN
ON
OFF
FIGURE 1-1:
 2015 Microchip Technology Inc.
D
SW
COUT
4.7 - 20 µF
GND
ILED =
0.3V
RSET
RSET
Typical MCP1664 LED Driver in Boost Topology Schematic
DS50002363A-page 11
MCP1664 LED Driver Evaluation Board User’s Guide
1.3
WHAT IS THE MCP1664 LED DRIVER EVALUATION BOARD?
The MCP1664 LED Driver Evaluation Board is used to evaluate and demonstrate
Microchip Technology’s MCP1664 product. This board demonstrates the MCP1664 in
a boost-converter application supplied from an external voltage source, which drives a
string of LEDs with three selectable currents. The MCP1664 LED Driver Evaluation
Board was developed to help engineers reduce the product design cycle time.
LEDs can be dimmed in two ways:
• Analog dimming: changes LED light output by simply adjusting the value of the
sense resistor and, by doing so, modifying the DC current in the LED string.
• Pulse-width modulation (PWM) dimming: achieves the same effect as analog
dimming by varying the duty cycle of a constant current in the string to effectively
change the average current in the string.
For analog dimming, three output currents can be selected: 90 mA,180 mA and
270 mA. The output current can be changed with a dual switch that changes the
external LED current sense equivalent resistance.
For PWM dimming, a small triangular wave generator was added to the board along
with a variable resistor that sets the duty cycle for the EN pin.
1.4
CONTENTS OF THE MCP1664 LED DRIVER EVALUATION BOARD
This MCP1664 LED Driver Evaluation Board kit includes:
• One MCP1664 LED Driver Evaluation Board unit (ADM00641)
• Important Information Sheet
DS50002363A-page 12
 2015 Microchip Technology Inc.
MCP1664 LED DRIVER
EVALUATION BOARD
USER’S GUIDE
Chapter 2. Installation and Operation
2.1
INTRODUCTION
The MCP1664 has been developed for applications that require driving a string of
LEDs from a low-voltage source. The MCP1664 is a non-synchronous step-up
regulator that can operate over a wide output range up to 32V. Its maximum output
current is based on the switch peak current limit (set to 1.8A) and on the maximum
duty cycle of 90%. An important feature is that the device integrates the compensation
and protection circuitry so that the final solution will require a minimum number of
additional components.
L1
4.7 µH
SW
2.4V - 5.5V
R3
0
D1
MBRA140
LED1
VIN
CIN
2 x 10 µF
LED2
MCP1664
VFB
COUT
10 µF
LED3
EN
PWM Dimming
Block(1)
Note 1:
FIGURE 2-1:
2.2
LED4
GND
Q2
Q1
R12
3.3
R11
3.3
R10
3.3
For PWM Dimming Block refer to Figure 2-4.
MCP1664 LED Driver Boost Converter 90,180,270 mA Constant Current Application.
FEATURES
The MCP1664 LED Driver Evaluation Board has the following features:
• Input voltage range, VIN: 2.4V to 5.5V, with VIN VOUT
• Undervoltage lockout: 2.3V to start; 1.85V to stop
• Adjustable output current: 90 mA, 180 mA or 270 mA, selected using a mini dip
switch on board
• PWM Switching frequency = 500 kHz
• Variable resistor and triangular wave generator on the board that can be used for
PWM dimming
• 1.8A peak current limit
• Overtemperature protection (if the die temperature exceeds +150°C, 25°C hysteresis)
• Open load protection: if the LED string fails or is disconnected, the converter will
shut down to prevent failure.
 2015 Microchip Technology Inc.
DS50002363A-page 13
MCP1664 LED Driver Evaluation Board
2.3
GETTING STARTED
The MCP1664 LED Driver Evaluation Board is fully assembled and tested to evaluate and
demonstrate the MCP1664 product. This board requires the use of external lab supplies.
2.3.1
Power Input and Output Connection
2.3.1.1
POWERING THE MCP1664 LED DRIVER EVALUATION BOARD
Soldered test points are available for input voltage connections. The maximum input
voltage should not exceed 5.5V.
The MCP1664 LED Driver Evaluation Board was designed to help the engineer in the
process of validating the device. The package selected for the MCP1664 LED Driver
Evaluation Board is the 5-Lead SOT-23.
2.3.1.2
BOARD POWER-UP PROCEDURE:
1. Connect input supply as shown in Figure 2-2.
2. Using the variable resistor, the duty cycle applied on the EN pin is modified and
PWM dimming is obtained. When turning the variable resistor from one side to
the other, a change in the brightness of the LED can be observed.
3. Change the value of the output current using the Current Select Switch. There
are three available currents: 90 mA,180 mA and 270 mA. When modifying the
value of the sense resistor, a change in the brightness of the LED can be noticed.
Additional test points are available for visualizing different signals: SW node, output
current (by removing the R3 resistor and using an ampermeter or a current probe
between the CS and VOUT test points), FB node, the triangular signal or the PWM
signal applied on the EN pin.
PWM Dimming Block
+
Power
Supply
FIGURE 2-2:
DS50002363A-page 14
Analog
Dimming
Ampermeter or Current Probe
(if R3 resistor is removed)
MCP1664 LED Driver Evaluation Board Setup.
 2015 Microchip Technology Inc.
Installation and Operation
2.3.1.3
ADJUSTING LED CURRENT BY RECALCULATING THE SENSE
RESISTOR (ANALOG DIMMING)
The sense resistor is used to modify the value of the output current. The value for the
resistor can be calculated using the following equation:
EQUATION 2-1:
SENSE RESISTOR CALCULATION
V FB
R SENSE = -------------I LED
Where:
VFB
ILED
Note:
=
=
0.300V
output LED current
If the sense resistor is recalculated, the switch used for current selecting will
not be used, as it will add a resistor in parallel with the calculated component and the value of the current will be different than the one specified in
the User Guide.
Figure 2-3 shows the maximum output current for four LEDs:
FIGURE 2-3:
Maximum Output Current vs. Input Voltage.
For the MCP1664 LED Driver Evaluation Board, if the current select switch is set to
90 mA, the input voltage range varies from 2.4V to 5.5V; when the current select
switch is set to 180 mA, the input voltage range is from 3V to 5.5V; when the current
select switch is set to 270 mA, the input voltage range runs from 4.5V to 5.5V
 2015 Microchip Technology Inc.
DS50002363A-page 15
MCP1664 LED Driver Evaluation Board
2.3.1.4
PWM DIMMING BLOCK
The MCP1664 allows PWM dimming by turning on and off the LED with a PWM signal
applied to the EN pin. The maximum frequency for dimming is limited by the start-up
and the load. By varying the duty cycle of the PWM signal applied on the EN pin, the
LED current changes linearly.
In order to test this feature, a small variable PWM generator, created using three
operational amplifiers from a single quad-op-amp chip, was included on the board.
VDD
VDD
R1
4.7 k
R5
10 k
5
R6
10 k
R4
1.8 k
4 U2A
1
3
7
11 U2B
2
11 MCP6004
C6
0.1 µF
VDD
VDD
Triangular wave output
4 MCP6004
9
R7
10 k
FIGURE 2-4:
C1
0.1 µF
VDD
4 MCP6004
6
VDD
R2
2 k
C2 0.47 µF
C7
0.1 µF
10
8
11 U2C
PWM output
PWM Dimming Block.
The circuit consists of a triangular wave generator which is made up of U2B
(functioning as an integrator), U2A (acting as a comparator with hysteresis) and a
comparator (U2C). U2B non-inverting input is biased at VDD/2.
A virtual connection between the inverting and non-inverting inputs allows a constant
current through R1 equal to I = VDD/(2R1) which charges the capacitor C2. This way,
the U2B integrator output increases linearly with time. When it reaches 95% VDD, the
comparator output changes to its maximum output voltage VDD.
At that point, the output voltage of the integrator decreases linearly. When it reaches
5% VDD, the comparator output voltage switches to zero and the cycle repeats. Thus,
the integrator output is a triangular wave that swings between the levels of 5% and
95% VDD.
U2C compares the triangular wave against the DC level given by the R7 variable
resistor. Its output is a square wave, with a duty cycle that varies from 0% to 100%.
The frequency of the PWM signal is determined by R1, C2, R2 and R4:
EQUATION 2-2:
PWM DIMMING FREQUENCY
R2
f = ------------------------4R 1 R 4 C 2
DS50002363A-page 16
 2015 Microchip Technology Inc.
Installation and Operation
The R1 and R2 resistors affect not only the operating frequency but also the amplitude
of the triangular wave. Considering the maximum voltage of the triangular waves
(VTH) and the minimum voltage of the triangular waves (VTL), the amplitude swing and
the threshold voltages can be calculated by means of the following equation:
EQUATION 2-3:
TRIANGULAR WAVE AMPLITUDE SWING
R4
V TH – V TL = ------V DD
R2
Where: R4 < R2
For the MCP1664 LED Driver Evaluation Board, the components were chosen so that
they feature a PWM Dimming frequency of 125 Hz and an amplitude swing from
5% VDD to 95% VDD.
REFERENCE
VOLTAGE
TRIANGULAR
WAVE
DIMMING
SIGNAL
FIGURE 2-5:
 2015 Microchip Technology Inc.
Obtaining the Dimming Signal - 84% Duty Cycle.
DS50002363A-page 17
MCP1664 LED Driver Evaluation Board
TRIANGULAR
WAVE
REFERENCE
VOLTAGE
DIMMING
SIGNAL
FIGURE 2-6:
Obtaining the Dimming Signal - 27%.
DIMMING
SIGNAL
LED
CURRENT
SWITCH
SIGNAL
FIGURE 2-7:
DS50002363A-page 18
Dimming Results - VIN = 4.5V, ILED_SET = 90 mA, DUTY = 27%.
 2015 Microchip Technology Inc.
Installation and Operation
DIMMING
SIGNAL
LED
CURRENT
SWITCH
SIGNAL
FIGURE 2-8:
 2015 Microchip Technology Inc.
DIMMING results - VIN = 4.5V, ILED_SET = 90 mA, DUTY = 71%
DS50002363A-page 19
MCP1664 LED Driver Evaluation Board
NOTES:
DS50002363A-page 20
 2015 Microchip Technology Inc.
MCP1664 LED DRIVER
EVALUATION BOARD
USER’S GUIDE
Appendix A. Schematic and Layouts
A.1
INTRODUCTION
This appendix contains the following schematics and layouts for the MCP1664 LED
Driver Evaluation Board:
•
•
•
•
Board – Schematic
Board – Top Silk
Board – Top Copper and Silk
Board – Bottom Copper and Silk
 2015 Microchip Technology Inc.
DS50002363A-page 21
BOARD – SCHEMATIC
VIN
TP1
TP3
VDD
L1
1
J1
4.7uH
TP8
EN
FB
GND
5
GND
TP2
C3
10uF
C4
10uF
VIN
SW
R1
TP9
3
D1
1
HEATSINK1
0R
1206
MBRA140T3G
MCP1664
C5
LD1
10uF
50V
1210
1
J2
HEATSINK2
EP
GND
6
WHITE
GND
HEATSINK3
POWER TRAIN
EP
LD3
WHITE
HEATSINK4
R5
R
1
10k
0603
1%
OUTB
B
5
R6
R
1
10k
0603
1%
2
OUTA
A
R4
7
3
1.8k
8k
0603
1%
11
C6
0.1uF
16V
0603
GND
EP
TP7
DIM1
DIM2
Q1
DMN2050L-7
3
2
R9
R
1
10k
0603
1%
GND
DMN2050L-7
2
TP10
R8
R
1
10k
0603
1%
GND
OUTC
C
3
3.3R
0805
1%
GND
10
2
3.3R
0805
1%
GND
R7
10k
3386F
10%
C7
0.1uF
16V
0603
VSS
S
+C
C
VDD
U2C
4
VDD
D
Q2
1
DIM1
-C
R12
1
4
3
3
1
DIM2
1
2
SW1
S
DIP 2 SPST
3.3R
0805
1%
GND
VDD
9
R11
8
13
DIMMING
GND
GND
GND
GND
-D
U2D
4
VDD
D
OUTD
D
11
12
GND
TP6
GND
C1
0.1uF
16V
0603
11
VDD
GND
R10
1
VSS
S
+A
A
GND
WHITE
VDD
VDD
U2A
4
VDD
D
VSS
S
+B
B
-A
U2B
4
VDD
D
LD4
ANALOG DIMMING
-B
2kk
0603
1%
VDD
DD
VDD
VDD
WHITE
LD2
GND
0.47uF
6.3V
0603
R3
R2
4.7k
7k
0603
5%
C2
2
TP5
DIMMING
4
U1
EP
TP4
GND
PWM DIMMING
VSS
S
+D
D
11
GND
14
 2015 Microchip Technology Inc.
MCP1664 LED Driver Evaluation Board User’s Guide
DS50002363A-page 22
A.2
Schematic and Layouts
A.3
BOARD – TOP SILK
A.4
BOARD – TOP COPPER AND SILK
A.5
BOARD – BOTTOM COPPER AND SILK
 2015 Microchip Technology Inc.
DS50002363A-page 23
MCP1664 LED Driver Evaluation Board User’s Guide
NOTES:
DS50002363A-page 24
 2015 Microchip Technology Inc.
MCP1664 LED DRIVER
EVALUATION BOARD
USER’S GUIDE
Appendix B. Bill of Materials (BOM)
TABLE B-1:
BILL OF MATERIALS (BOM)
Qty.
Reference
Description
Manufacturer
3
C1, C6, C7
Cap. ceramic 0.1 µF 16V 10% X7R SMD
0603
AVX Corporation
0603YC104KAT2A
1
C2
Cap. ceramic 0.47 µF 6.3V 10% X5R
SMD 0603
Murata Electronics®
GRM188R60J474KA01D
2
C3, C4
Cap. ceramic 10 µF 10V 10% X7R SMD
0805
Murata Electronics
GRM21BR71A106KE51L
1
C5
Cap. ceramic 10 µF 50V 20% X7R SMD
1210
Taiyo Yuden Co., Ltd.
UMK325AB7106MM-T
1
D1
Diode Schottky MBRA140T3G 505 mV
1A 40V DO-214AC_SMA
ON Semiconductor®
MBRA140T3G
2
J1, J2
Conn. TP Loop Tin SMD
Harwin Inc.
S1751-46R
1
L1
Inductor 4.7 µH 3.16A 20% SMD
L7.3W7.3H4.5
Würth Elektronik
7447779004
4
LD1, LD2,
LD3, LD4
Diode LED White 3.2V 700 mA 95lm
2700K SMD L3.45W3.45H2.2
Würth Elektronik
158353027
2
Q1, Q2
Trans. FET N-CH DMN2050L-7 20V 5.9A Diodes® Incorporated
1.4W SOT-23-3
DMN2050L-7
1
PCB
Printed Circuit Board – MCP1664 LED
Driver Evaluation Board
04-10371
1
R1
Res. TKF 4.7k 5% 1/10W SMD 0603
—
Panasonic® - ECG
Part Number
ERJ-3GEYJ472V
1
R2
Res. TKF 2k 1% 1/10W SMD 0603
Panasonic - ECG
ERJ-3EKF2001V
1
R3
Res. TKF 0R SMD 1206
KOA Speer Electronics,
Inc.
RK73Z2BTTD
1
R4
Res. TKF 1.8k 1% 1/10W SMD 0603
Panasonic - ECG
ERJ-3EKF1801V
4
R5, R6, R8, Res. TF 10k 1% 1/16W SMD 0603
R9
TE Connectivity, Ltd.
5-1879337-9
1
R7
Res. Trimmer Cermet 10k 10% 500 mW
TH 3386F
Bourns®, Inc.
3386F-1-103T
3
R10, R11,
R12
Res. TKF 3.3R 1% 1/8W SMD 0805
Vishay/Dale
CRCW08053R30FKEA
1
SW1
Switch DIP 2 SPST 24V 25 mA
418121270802 SMD
Würth Elektronik
418121270802
1
TP1
Conn. TP Loop Red TH
Keystone Electronics
Corp.
5010
3
TP2, TP6,
TP10
Conn. TP Loop Black TH
Keystone Electronics
Corp.
5011
6
TP3, TP4,
TP5, TP7,
TP8, TP9
Conn. TP Loop Orange TH
Keystone Electronics
Corp.
5013
Note:
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
 2015 Microchip Technology Inc.
DS50002363A-page 25
MCP1664 LED Driver Evaluation Board
TABLE B-1:
Qty.
BILL OF MATERIALS (BOM) (CONTINUED)
Reference
Description
Manufacturer
Part Number
1
U1
MCHP Analog Switcher Boost LED
Driver 32V
Microchip Technology Inc. MCP1664T-E/OT
1
U2
MCHP Analog Op Amp 4-Ch 1 MHz
MCP6004T-E/ST TSSOP-14
Microchip Technology Inc. MCP6004-E/ST
4
BUMPER CYLIN 0.312” DIA BLK
3M
SJ61A11
1
Heat Sink for SMD, 22°C/W
Fischer Elektronik
CK SMD B 19 SA
1
Thermal tape, Adhesive 0.85 W/M.K
Amec Thermasol
FCTS73-10N1
Note:
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
DS50002363A-page 26
 2015 Microchip Technology Inc.
MCP1664 LED Driver Evaluation Board
NOTES:
 2015 Microchip Technology Inc.
DS50002363A-page 27
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Tel: 886-7-213-7828
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Fax: 86-29-8833-7256
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Tel: 49-89-627-144-0
Fax: 49-89-627-144-44
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Tel: 49-7231-424750
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Tel: 39-0331-742611
Fax: 39-0331-466781
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01/27/15
DS50002363A-page 28
 2015 Microchip Technology Inc.