MCP1632
300 kHz Boost Converter
Demo Board
User’s Guide
2014 Microchip Technology Inc.
DS20005252A
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ISBN: 978-1-62077-8401
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DS20005252A-page 2
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2014 Microchip Technology Inc.
Object of Declaration: MCP1632 300 kHz Boost Converter Demo Board User’s Guide
2014 Microchip Technology Inc.
DS20005252A-page 3
MCP1632 300 kHz Boost Converter Demo Board User’s Guide
NOTES:
DS20005252A-page 4
2014 Microchip Technology Inc.
MCP1632 300 KHZ BOOST CONVERTER
DEMO 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 Short Overview: MCP1632 PWM Controller ................................................ 11
1.3 What is the MCP1632 300 kHz Boost Converter Demo Board? .................. 12
1.4 What is Contained in the MCP1632 300 kHz Boost Converter
Demo Board Kit? ..................................................................................... 12
Chapter 2. Installation and Operation
2.1 Introduction ................................................................................................... 13
2.2 Getting Started ............................................................................................. 13
Appendix A. Schematic and Layouts
A.1 Introduction .................................................................................................. 17
A.2 Board – Schematic ....................................................................................... 18
A.3 Board – Top Silk .......................................................................................... 19
A.4 Board – Top Copper and Silk ....................................................................... 20
A.5 Board – Top Copper .................................................................................... 21
A.6 Board – Bottom Cooper ............................................................................... 22
A.7 Board – Bottom Copper and Silk ................................................................. 23
A.8 Board – Bottom Silk ..................................................................................... 24
Appendix B. Bill of Materials
Appendix C. Typical Performance Data, Curves and Waveforms
C.1 Performance Overview ................................................................................ 27
Worldwide Sales and Service .................................................................................... 32
2014 Microchip Technology Inc.
DS20005252A-page 5
MCP1632 300 kHz Boost Converter Demo Board User’s Guide
NOTES:
DS20005252A-page 6
2014 Microchip Technology Inc.
MCP1632 300 KHZ BOOST CONVERTER
DEMO 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
“DSXXXXXA”, where “XXXXX” 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
MCP1632 300 kHz Boost Converter Demo 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 MCP1632 300 kHz Boost Converter Demo
Board as a development tool to emulate and debug firmware on a target board. The
manual layout is as follows:
• Chapter 1. “Product Overview” – Shows a brief description of the MCP1632
300 kHz Boost Converter Demo Board.
• Chapter 2. “Installation and Operation” – Includes instructions on how to get
started with the MCP1632 300 kHz Boost Converter Demo Board.
• Appendix A. “Schematic and Layouts” – Shows the schematic and layout
diagrams for the MCP1632 300 kHz Boost Converter Demo Board.
• Appendix B. “Bill of Materials”– Lists the parts used to build the MCP1632 300
kHz Boost Converter Demo Board.
• Appendix C. “Typical Performance Data, Curves and Waveforms” – Shows
the typical performance graphs.
2014 Microchip Technology Inc.
DS20005252A-page 7
MCP1632 300 kHz Boost Converter Demo 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
DS20005252A-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)
{ ...
}
2014 Microchip Technology Inc.
Preface
RECOMMENDED READING
This user's guide describes how to use MCP1632 300 kHz Boost Converter Demo
Board. Other useful documents are listed below. The following Microchip documents
are available and recommended as supplemental reference resources.
• MCP1632 Data Sheet – “High-Speed Low-Side PWM Controller”
(DS20005254)
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 (January 2014)
• Initial Release of this Document.
2014 Microchip Technology Inc.
DS20005252A-page 9
MCP1632 300 kHz Boost Converter Demo Board User’s Guide
NOTES:
DS20005252A-page 10
2014 Microchip Technology Inc.
MCP1632 300 KHZ BOOST CONVERTER
DEMO BOARD USER’S GUIDE
Chapter 1. Product Overview
1.1
INTRODUCTION
This chapter provides an overview of the MCP1632 300 kHz Boost Converter Demo
Board and covers the following topics:
• Short Overview: MCP1632 PWM Controller
• What is the MCP1632 300 kHz Boost Converter Demo Board?
• What is Contained In the MCP1632 300 kHz Boost Converter Demo Board Kit?
1.2
SHORT OVERVIEW: MCP1632 PWM CONTROLLER
The MCP1632 is a high-speed, Current Mode PWM controller intended for applications
that require low-side MOSFET control, such as the Boost, Flyback or SEPIC
converters. The MCP1632 converter integrates all the blocks necessary to develop a
standalone switch-mode power supply. The MCP1632 PWM controller offers great
flexibility to designers, as the power train can be tailored for various applications and
power levels. The MCP1632 converter includes: internal oscillator with two options for
switching frequency (300 kHz and 600 kHz), adjustable reference voltage generator
and adjustable soft-start time, internal ramp generator for slope compensation and
blanking circuit for current sense (CS) signal, and an Undervoltage Lockout circuit
(UVLO). The MCP1632 PWM converter can be easily interfaced with PIC®
microcontrollers in order to develop intelligent solutions. The MCP1632 converter
accepts input bias voltages between 3V and 5.5V. For larger input voltages, a linear
voltage regulator can be used to provide the necessary bias voltage.
Typical applications include: general purpose DC-DC converters, LED drivers,
batteries chargers and bias generators.
2014 Microchip Technology Inc.
DS20005252A-page 11
MCP1632 300 kHz Boost Converter Demo Board User’s Guide
VIN
VOUT
VCC
VREF
EN/SYNC
MCP1632
CSS
RR
VEXT
CS
COMP
FB
GND
FIGURE 1-1:
1.3
MCP1632 Typical Application for Peak Current Mode Control.
WHAT IS THE MCP1632 300 KHZ BOOST CONVERTER DEMO BOARD?
The MCP1632 300 kHz Boost Converter Demo Board is a compact, highly efficient,
step-up voltage converter that will convert the input voltage rail (typically 5V) to a
regulated 12V output voltage. The maximum output current for this demo board is 0.9A.
The board demonstrates the capabilities of the MCP1632 PWM controller. Test points
for various signals are provided for measuring different parameters of the converter.
The demo board can be modified to support output voltages from 9V to 15V by
changing a single resistor.
1.4
WHAT IS CONTAINED IN THE MCP1632 300 KHZ BOOST CONVERTER
DEMO BOARD KIT?
This MCP1632 300 kHz Boost Converter Demo Board kit includes the following items:
• MCP1632 300 kHz Boost Converter Demo Board (ADM00530)
• Important Information Sheet
DS20005252A-page 12
2014 Microchip Technology Inc.
MCP1632 300 KHZ BOOST CONVERTER
DEMO BOARD USER’S GUIDE
Chapter 2. Installation and Operation
2.1
INTRODUCTION
The MCP1632 300 kHz Boost Converter Demo Board was developed to provide a
compact, low-cost and highly efficient step-up conversion for low output currents.
The key features of this board include:
• Input Voltage Range: 3.6V to 5.5V
• Output Voltage: 12V (can be adjusted between 9V and 15V by changing a single
resistor)
• Maximum Output Current: 0.9A
• 90% typical efficiency at 12V/0.8A output and 5V input
• 300 kHz fixed switching frequency
• Overcurrent Protection for MOSFETs
• Shutdown input for placing the converter in low-power Standby mode
• Undervoltage Lockout (UVLO) with 2.7V (Off) and 2.8V (On) typical thresholds
2.2
GETTING STARTED
The MCP1632 300 kHz Boost Converter Demo Board is fully assembled and tested to
evaluate and demonstrate the capabilities of the MCP1632 PWM controller.
2.2.1
•
•
•
•
•
•
Necessary Instruments and Tools
Adjustable DC Power Supply with 0V-6V/5 ADC range output capability
Electronic load with at least 1A current capability and load stepping capability
Digital Oscilloscope with a minimum bandwidth of 50MHz
Digital voltmeter/ammeter
Optionally, a Network Analyzer/Bode Plot Analyzer for loop analysis
Wires for connections; these wires must sustain high current, 4A for the
connection between adjustable DC power supply and board, 1A for the
connection between the board and the electronic load
2.2.2
Setup procedure
To power up the MCP1632 300 kHz Boost Converter Demo Board, the following steps
must be completed:
1. Connect the Electronic Load to J3 connector of the demo board; the “Positive”
(+) and “Negative” (-) connector pins are marked on the board silkscreen.
2. Connect the Adjustable DC Power Supply to J1 connector of the demo board; the
“Positive” (+) and “Negative” (-) connector pins are marked on the board
silkscreen.
3. The DC voltage supplied by the Adjustable DC Power Supply must be between
3.6V and 5.5V.
2014 Microchip Technology Inc.
DS20005252A-page 13
MCP1632 300 kHz Boost Converter Demo Board User’s Guide
2.2.3
Board Testing
The typical testing setup is depicted in Figure 2-1. Table 2-1 shows all the available test
points on the board.
The user can connect various instruments at the listed test points to evaluate the
parameters of the converter. The typical performance data, curves and waveforms are
presented in Appendix C. “Typical Performance Data, Curves and Waveforms”.
Note that some parameters vary with the input voltage (e.g., the maximum output
current should not exceed 0.8A if the input voltage is below 4 V).
FIGURE 2-1:
Typical Test Setup.
TABLE 2-1:
TEST POINTS DESCRIPTION
Test Point
TP1, TP2, TP3, TP4
TP6,TP7
TP5
Description
GND
Board GND
VIN
Input voltage
SHDN
TP14
CS
TP12
MCS
Shutdown input (EN pin of MCP1632)
CS pin of MCP1632
MOSFET current sense resistor (R9)
TP10
DR
MOSFET drive signal (pin 6 of MCP1632)
TP9
SW
Main switch node (drain of Q1 MOSFET)
TP13
VREF
Reference voltage (pin 8 of MCP1632)
TP8
VOUT
Converter's output voltage
TP11
FB
TP15
COMP
TP16, TP17
DS20005252A-page 14
Label
CH B, CH A
Feedback voltage (pin 2 of MCP1632)
Output of the error amplifier (pin 2 of MCP1632)
Signal injection points for loop measurement
2014 Microchip Technology Inc.
Installation and Operation
2.2.3.1
ADJUSTING THE OUTPUT VOLTAGE
The output voltage can be modified by changing the value of R8 from the feedback
divider. The output voltage is set according to Equation 2-1.
EQUATION 2-1:
OUTPUT VOLTAGE
R3 + R8
V OUT = V REF --------------------R8
Where:
VREF(V)
=
R5() X 50 X 10-6
R3
=
20 k
Do not modify the value of the R3 resistor (20 kΩ) because this will affect the loop
compensation of the system.
Some parameters, such as efficiency, the overcurrent protection thresholds and the
input and output voltage ripple, can be affected by the modification of the output
voltage.
Table 2-2 shows the standard value of the R8 resistor for several common output
voltages.
TABLE 2-2:
OUTPUT VOLTAGE VERSUS R8 VALUE (R3 = 20 k)
VOUT (V)
2014 Microchip Technology Inc.
R8 (k)
VREF (V)
9
5.71
2
12
4.02
2
15
3.08
2
DS20005252A-page 15
MCP1632 300 kHz Boost Converter Demo Board User’s Guide
NOTES:
DS20005252A-page 16
2014 Microchip Technology Inc.
MCP1632 300 KHZ BOOST CONVERTER
DEMO BOARD USER’S GUIDE
Appendix A. Schematic and Layouts
A.1
INTRODUCTION
This appendix contains the following schematics and layouts for the MCP1632 300 kHz
Boost Converter Demo Board:
•
•
•
•
•
•
•
Board – Schematic
Board – Top Silk
Board – Top Copper and Silk
Board – Top Copper
Board – Bottom Cooper
Board – Bottom Copper and Silk
Board – Bottom Silk
2014 Microchip Technology Inc.
DS20005252A-page 17
2014 Microchip Technology Inc.
A.2
BOARD – SCHEMATIC
TP1
TP2
TP3
TP4
GND
GND
GND
GND
0
R1
VOUT
VIN
1uF DNP
DNP
C3
DNP
TP13
R5
40.2k
C8
10nF
1
47pF
R6
10k
C12
10nF
2
TP15
7
GND
TP9
R7
C13
2.2k
51
FDS6630
DNP
10uF
0.1
J3
TP17
C6
C9
R9
TP8
TP16
R10
TP12
3
DNP
GND
D1
S
CS
GND
Q1
G
TP14
COMP
FB
Term Block 2Pin 2.54mm
D
6
VREF
GND
C7
GND
TP10
VEXT
5
Term Block 2Pin 2.54mm
8
EN
10uF
10uH
GND
U2
10uF
R3
20k
R4
DNP
C10
C11
10uF
10uF
R8
GND
GND
GND
GND
GND
GND
GND
4.02k
GND
GND
GND
GND
Term Block 2Pin 2.54mm
DS20005252A-page 18
Schematic and Layouts
2 1
4
VIN
MCP1632 MSOP
J2
C5
L1
U1
GND GND
J1
C4
2 1
C1 C2
3
TP11
100k
TP7
GND
2
1 2
TP6
R2
1
TP5
Schematic and Layouts
A.3
BOARD – TOP SILK
2014 Microchip Technology Inc.
DS20005252A-page 19
MCP1632 300 kHz Boost Converter Demo Board User’s Guide
A.4
BOARD – TOP COPPER AND SILK
DS20005252A-page 20
2014 Microchip Technology Inc.
Schematic and Layouts
A.5
BOARD – TOP COPPER
2014 Microchip Technology Inc.
DS20005252A-page 21
MCP1632 300 kHz Boost Converter Demo Board User’s Guide
A.6
BOARD – BOTTOM COOPER
DS20005252A-page 22
2014 Microchip Technology Inc.
Schematic and Layouts
A.7
BOARD – BOTTOM COPPER AND SILK
2014 Microchip Technology Inc.
DS20005252A-page 23
MCP1632 300 kHz Boost Converter Demo Board User’s Guide
A.8
BOARD – BOTTOM SILK
DS20005252A-page 24
2014 Microchip Technology Inc.
MCP1632 300 KHZ BOOST CONVERTER
DEMO BOARD USER’S GUIDE
Appendix B. Bill of Materials
TABLE B-1:
Qty
BILL OF MATERIALS (BOM)
Reference
Description
Manufacturer
Part Number
1
C1
Cap. ceramic 1 µF 16V 10% X7R 0805
Yageo Corporation
CC0805KKX7R7BB105
0
C2 – C3,
C6, C13
DO NOT POPULATE
—
—
2
C4 – C5
Cap. ceramic 10 µF 16V 10% X7R 1210
Samsung
Electro-Mechanics
America, Inc.
CL32B106KOULNNE
1
C7
Cap. ceramic 47 pF 100V 5% COG 0603
AVX Corporation
06031A470JAT2A
2
C8, C12
Cap. ceramic 10000 pF 25V 5% NP0 0603 TDK Corporation
C1608C0G1E103J080AA
3
C9 – C11
Cap. ceramic 10 µF 25V 10% X7R 1210
TDK Corporation
C3225X7R1E106K
1
D1
Diode Schottky 40V 2A DO214AC
Vishay
SSA24-E3/61T
2
J1, J3
Conn. term. block 2.54 MM 2 POS
Phoenix Contact GmbH 1725656
& Co.
2
J2
Conn. header Vert. 0.100" Gold
TE Connectivity, Ltd.
1
L1
Inductor power 10 UH 4.00A SMD
EPCOS AG
B82477G2103M
PCB
Printed Circuit Board - MCP1632 300 kHz
Boost Converter Demo Board
—
104-00530
1
Q1
MOSFET N-Ch. 30V 6.5A 8 SOIC
Fairchild
Semiconductor®
FDS6630A
1
R1
Res. 0 1/10W 0603 SMD
Panasonic® - ECG
ERJ-3GEY0R00V
1
R2
Res. 100 k 1/10W 1% 0603 SMD
Panasonic - ECG
ERJ-3EKF1003V
1
R3
Res. 20.0 k 1/10W 1% 0603 SMD
Panasonic - ECG
ERJ-3EKF2002V
5-146868-1
0
R4
DO NOT POPULATE
—
—
1
R5
Res. 40.2 k 1/10W 1% 0603 SMD
Yageo Corporation
RC0603FR-0740K2L
1
R6
Res. 10.0 k 1/8W 1% SMD 0603
Vishay
MCT06030C1002FP500
1
R7
Res. 2.20 k 1/8W 1% SMD 0603
Vishay
MCT06030C2201FP500
1
R8
Res. 4.02 k 1/10W 1% 0603 SMD
Yageo Corporation
RC0603FR-074K02L
1
R9
Res. 0.1 1/2W 1% 1206 SMD
Bourns®, Inc.
CRM1206-FX-R100ELF
1
R10
Res. 51.0 1/10W 1% 0603 SMD
Yageo Corporation
RC0603FR-0751RL
5
TP1,
TP3 – TP4,
TP7 – TP8
PC test point compact SMT
Keystone Electronics
Corp.
5016
0
TP5 – TP6, DO NOT POPULATE
TP9 – TP17
—
—
0
U1
DO NOT POPULATE
—
—
1
U2
High-Speed Boost Controller
Microchip Technology
Inc.
MCP1632-AAE/MS
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.
2014 Microchip Technology Inc.
DS20005252A-page 25
MCP1632 300 kHz Boost Converter Demo Board User’s Guide
NOTES:
DS20005252A-page 26
2014 Microchip Technology Inc.
MCP1632 300 KHZ BOOST CONVERTER
DEMO BOARD USER’S GUIDE
Appendix C. Typical Performance Data, Curves and Waveforms
C.1
PERFORMANCE OVERVIEW
This chapter shows some of the typical performance parameters and curves of the
MCP1632 300 kHz Boost Converter Demo Board.
TABLE C-1:
CONVERTER PARAMETERS
Parameter
Value
Input Voltage Range (V)
Comments
3.6 – 5.5
Output Voltage (V)
12
±2.5% Tolerance
Maximum Output Current (A)
0.9
Steady State output current
Output Voltage Ripple (mV)
< 120
VIN = 5V, IOUT = 0.85A
Input Voltage Ripple (mV)
< 30
VIN = 5V, IOUT = 0.85A
Output Voltage Overshoot during Step Load (mV)
< 600
Step Load 0.3A to 0.8A
Switching Frequency (kHz)
250 – 350 Typical 300 kHz
100
Efficiency (%)
90
VIN = 5V
80
VIN = 3.5V
70
60
50
40
100 200 300 400 500 600 700 800 900 1000
IOUT (mA)
FIGURE C-1:
2014 Microchip Technology Inc.
Efficiency.
DS20005252A-page 27
MCP1632 300 kHz Boost Converter Demo Board User’s Guide
FIGURE C-2:
Step Load (VIN = 5V).
FIGURE C-3:
Output Voltage Ripple/Noise (VIN = 5V, IOUT = 0.85A, BW = 200 MHz).
DS20005252A-page 28
2014 Microchip Technology Inc.
Typical Performance Data, Curves and Waveforms
FIGURE C-4:
Input Voltage Ripple/Noise (VIN = 5V, IOUT = 0.85A, BW = 200 MHz).
FIGURE C-5:
SW and Gate Signals (VIN = 5V, IOUT = 0.85A, BW = 300 MHz).
2014 Microchip Technology Inc.
DS20005252A-page 29
MCP1632 300 kHz Boost Converter Demo Board User’s Guide
FIGURE C-6:
DS20005252A-page 30
Soft Start.
2014 Microchip Technology Inc.
Typical Performance Data, Curves and Waveforms
FIGURE C-7:
Bode Plots (Red-Gain, Blue-Phase) (VIN = 5V, VOUT = 12V, IOUT = 0.5A).
2014 Microchip Technology Inc.
DS20005252A-page 31
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10/28/13
2013 Microchip Technology Inc.