TC110 Boost Converter Demo Board User's Guide

TC110
Boost Converter
Demo Board
User’s Guide
© 2007 Microchip Technology Inc.
DS51646A
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DS51646A-page ii
© 2007 Microchip Technology Inc.
TC110 BOOST CONVERTER
DEMO BOARD USER’S GUIDE
Table of Contents
Preface ........................................................................................................................... 1
Introduction............................................................................................................ 1
Document Layout .................................................................................................. 1
Conventions Used in this Guide ............................................................................ 2
Recommended Reading........................................................................................ 2
The Microchip Web Site ........................................................................................ 3
Customer Support ................................................................................................. 3
Document Revision History ................................................................................... 3
Chapter 1. Product Overview ....................................................................................... 5
1.1 Introduction ..................................................................................................... 5
1.2 What is the TC110 Demo Board? .................................................................. 6
1.3 What the TC110 Demo Board kit includes ..................................................... 6
Chapter 2. Installation and Operation ......................................................................... 7
2.1 Introduction ..................................................................................................... 7
2.2 Features ......................................................................................................... 7
2.3 Getting Started ............................................................................................... 8
Appendix A. Schematics and Layouts ...................................................................... 11
A.1 Introduction .................................................................................................. 11
A.2 Board Schematic .......................................................................................... 12
A.3 Board – Top Silk Layer ................................................................................ 13
A.4 Board – Top Metal Layer ............................................................................. 14
A.5 Board – Bottom Silk Layer ........................................................................... 15
A.6 Board – Bottom Metal Layer ........................................................................ 16
Appendix B. Bill Of Materials (BOM) ......................................................................... 17
Worldwide Sales and Service .................................................................................... 18
© 2007 Microchip Technology Inc.
DS51646A-page iii
TC110 Boost Converter Demo Board User’s Guide
NOTES:
DS51646A-page iv
© 2007 Microchip Technology Inc.
TC110 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 on-line help.
Select the Help menu, and then Topics to open a list of available on-line help files.
INTRODUCTION
This chapter contains general information that will be useful to know before using the
TC110 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 TC110 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” – Important information about the TC110 Boost
Converter Demo 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. “Schematics and Layouts” – Shows the schematic and layout
diagrams for the TC110 Boost Converter Demo Board.
• Appendix B. “Bill Of Materials (BOM)” – Lists the parts used to build the TC110
Boost Converter Demo Board.
© 2007 Microchip Technology Inc.
DS51646A-page 1
TC110 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
Examples
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
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)
{ ...
}
RECOMMENDED READING
This user's guide describes how to use TC110 Boost Converter Demo Board. Other
useful documents are listed below.
TC110 Data Sheet, "PFM/PWM Step-Up DC/DC Controller", DS21355
This data sheet provides detailed information regarding the TC110 product family.
MCP73831/2 Data Sheet, "Miniature Single-Cell, Fully Integrated Li-Ion,
Li-Polymer Charge Management Controller”, DS21984
This data sheet provides detailed information regarding the MCP73831/2 product
family.
DS51646A-page 2
© 2007 Microchip Technology Inc.
Preface
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
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://support.microchip.com
DOCUMENT REVISION HISTORY
Revision A (February 2007)
• Initial Release of this Document.
© 2007 Microchip Technology Inc.
DS51646A-page 3
TC110 Boost Converter Demo Board User’s Guide
NOTES:
DS51646A-page 4
© 2007 Microchip Technology Inc.
TC110 BOOST CONVERTER
DEMO BOARD USER’S GUIDE
Chapter 1. Product Overview
1.1
INTRODUCTION
The TC110 Boost Converter Demo Board can charge Li-Ion Batteries with single-cell
Alkaline battery or 2-cell Alkaline battery at maximum 500 mA constant current. The
TC110 Boost Converter Demo Board is used to evaluate Microchip’s TC110 PFM/PWM
Step-Up DC/DC Controller. The TC110 is a step-up (Boost) switching controller that
can regulate output voltage with a typical start-up voltage of 0.9V. The TC110 Boost
Converter Demo Board also includes a MCP73832 Miniature Single-Cell, Fully
Integrated Li-Ion, Li-Polymer Charge Management Controllers. Microchip’s MCP73832
is a highly advanced linear charge management controllers for use in space-limited,
cost-sensitive applications. The TC110 Boost Converter Demo Board is a ready to use
solution for portable applications when no DC plug is available. The TC110 Boost Converter Demo Board can efficiently transfer energy from Alkaline batteries to Li-Ion
battery pack.
This chapter covers the following topics:
• What is the TC110 Boost Converter Demo Board?
• What the TC110 Boost Converter Demo Board Kit includes.
2-Cell Alkaline
+
TC110
1-Cell Alkaline
+
5V
MCP73832
dc-dc
Converter
Battery
Charger
GND
GND
+
Li-Ion
- Battery
-
GND
FIGURE 1-1:
Diagram.
© 2007 Microchip Technology Inc.
GND
TC110 Boost Converter Demo Board System Level Block
DS51646A-page 5
TC110 Boost Converter Demo Board User’s Guide
1.2
WHAT IS THE TC110 DEMO BOARD?
The TC110 Boost Converter Demo Board demonstrates the use of a PFM/PWM
Step-Up DC/DC Controller (TC110) to supply input voltage for a Miniature Single-Cell,
Fully Integrated Li-Ion, Li-Polymer Charge Management controller (MCP73832) that
charges a Li-Ion Battery from 1-Cell or 2-Cell Alkaline batteries.
The TC110 Boost Converter Demo Board is setup to evaluate simple dc-to-dc conversion while demonstrating the potential integration into a portable battery charger application.The TC110 Boost Converter Demo Board charges Li-Ion battery at constant
current of 200 mA for single Alkaline application set-up. However, the charge current
can be programmed up to 500 mA by changing a resistor value. This demo board is
designed to be able to select between 1-cell Alkaline battery and 2-cell Alkaline battery
using a single switch.
The TC110 Boost Converter Demo Board utilizes Microchip's TC110 (PFM/PWM
Step-Up DC/DC Controller) with the MCP73832 (Miniature Single-Cell Integrated
Li-Ion, Li-Polymer Charge Management Controller) that effectively transfers the energy
from 1-cell or 2-cell Alkaline battery source to a single-cell Li-Ion battery.
The additional test probes can connect to DC source and loads directly for bench
testings.
1.3
WHAT THE TC110 DEMO BOARD KIT INCLUDES
This TC110 Boost Converter Demo Board kit includes:
• TC110 Boost Converter Demo Board (102-00122)
• Analog and Interface Products Demonstration Boards CD-ROM (DS21912)
- TC110 Boost Converter Demo Board User’s Guide (DS51646)
DS51646A-page 6
© 2007 Microchip Technology Inc.
TC110 BOOST CONVERTER
DEMO BOARD USER’S GUIDE
Chapter 2. Installation and Operation
2.1
INTRODUCTION
The TC110 Boost Converter Demo Board demonstrates Microchip's 0.9V start-up
PFM/PWM Step-Up DC/DC Controller. A single cell Alkaline battery operates between
0.9V to 1.5V. Thus, the TC110 is a good Boost converter for applications that run from
1-cell or 2-cell Alkaline batteries. The TC110 is a Boost switching controller that
provides output current of up to 300 mA with a typical efficiency of 84%. The TC110
Boost Converter Demo Board normally operates in pulse width modulation (PWM)
mode, but automatically switches to pulse frequency modulation (PFM) mode at low
output loads for higher efficiency.
The MCP73832 employs a constant-current/constant-voltage algorithm with selectable
preconditioning and charge termination. Both constant-current and constant-voltage
features will be reviewed in the section 2.2.
The TC110 Boost Converter Demo Board has built-in mechanical switches to turn off
and select voltage source between 1-cell Alkaline or 2-cell Alkaline batteries.
2.2
FEATURES
The TC110 Boost Converter Demo Board has the following features:
• Single-Cell Li-Ion Battery Charger, operates stand-alone without firmware added
for economic and fast pace design cycle
• Charges 1-cell Li-Ion battery pack from 0.9V to 3.0V Input (Battery types from
1-cell to 2-cell Alkaline batteries or similar rating NiCd and NiMH)
• Regulates output dc voltage to 5.0V. (TC110 Output voltages available in 3.0V,
3.3V, and 5V)
• 300 kHz fixed frequency (TC110 is available in 100 kHz and 300 kHz fixed
frequency)
• ON/OFF button used to enable and disable system
• 3-position toggle switch to select single, dual battery input or disable
• LED ON/OFF to show the charging activity and standby mode
• Easy adjust constant charging current with single resistor modification (The
default current is 200 mA to optimize 1-cell Alkaline battery, but can go up to
500 mA for fast charging cycle while running in 2-cell Alkaline battery
• MCP73832 is used to charge Li-Ion battery pack at constant voltage (The
MCP73832 is available in 4.20V, 4.35V, 4.40V, or 4.50V fixed voltage rating to
accommodate emerging battery charging requirements)
• TC110 Boost Converter Demo Board operates directly from single cell AA battery
or DC power source for evaluations
• Ready to use design or simple modification to support various new portable
applications.
© 2007 Microchip Technology Inc.
DS51646A-page 7
TC110 Boost Converter Demo Board User’s Guide
2.3
GETTING STARTED
The TC110 Boost Converter Demo Board is fully assembled and tested for generating
a regulated 5V output voltage from TC110 from a 0.9V to 3V input voltage source while
charging Li-Ion battery pack at constant current up to 500 mA.
2.3.1
Power Input and Output Connection
2.3.1.1
POWERING THE TC110 BOOST CONVERTER DEMO BOARD
1. Insert the AA Alkaline batteries into battery holders. Brand new Alkaline batteries
are recommended to use for each charge.
2. Connect the positive side of the Li-Ion battery pack voltage to TP8 VBAT, connect
the battery pack return to the TP7 GND.
3. Turn on the TC110 Boost Converter Demo Board by moving dip switch toward
Microchip logo. Once the switch is turned on, the TC110 Boost Converter Demo
Board is powered. When powered, adjusting toggle switch position can select
between 1-cell or 2-cell Alkaline battery source. The charging cycle is disabled,
if the switch is keep in OFF position.
4. LED D2 will be illuminated when the charging cycle running.
5. LED D2 blinks when the system is on without Li-Ion battery pack (or load)
present.
6. During normal operation of the TC110 Boost Converter Demo Board, the system
can switch between both input sources or pause by adjusting the toggle switch
position.
Toggle Switch P osition
2-Cell OFF 1-Cell
ON
GND
Li-Ion
Battery
+
FIGURE 2-1:
DS51646A-page 8
Board Top Assembly and Connections.
© 2007 Microchip Technology Inc.
Installation and Operation
2.3.1.2
APPLYING BATTERY TO TC110 BOOST CONVERTER DEMO BOARD
A 1-cell Li-Ion battery pack shall be connected to the VBAT and GND connectors before
applying input power and turn on S1 and S2 to start the charging cycle. Once the
system starts charging cycle, VOUT (TP4) is a constant 5V, 2-cell Bat (TP1) and 1-cell
Bat (TP2) are test points that used to measure the battery voltage from Alkaline
batteries (A good Alkaline battery should rate between 0.9V to 1.5V).
2.3.1.3
LED STATUS INDICATION
The LED is connected between VBAT and STAT pins to demonstrate the charging
activity. The LED illuminates when the charging cycle begins (battery pack presents,
S1 and S2 are in the ON mode). The LED blinks when no load is present, and remain
off when S1 or S2 are disable or OFF.
2.3.1.4
ADJUST CONSTANT CHARGING CURRENT
Charge Current (mA)
The TC110 Boost Converter Demo Board is designed to operate with 200 mA constant
current. However, it can be easily programmed to operate with various constant charging current by changing the value of R3. As shown in Figure 2-2, the constant programmed current can go up to 500 mA for fast charge by applying 2 kΩ resistor to R3.
Therefore, the constant charging current can easily be adjusted from selecting different
resistor values.
550
500
450
400
350
300
250
200
150
100
50
0
2
4
6
8
10
12
14
16
18
20
Programming Resistor (kΩ)
FIGURE 2-2:
© 2007 Microchip Technology Inc.
Charging Current (IOUT) vs. Programming Resistor (R3).
DS51646A-page 9
TC110 Boost Converter Demo Board User’s Guide
NOTES:
DS51646A-page 10
© 2007 Microchip Technology Inc.
TC110 BOOST CONVERTER
DEMO BOARD USER’S GUIDE
Appendix A. Schematics and Layouts
A.1
INTRODUCTION
This appendix contains the following schematics and layouts for the TC110 Boost
Converter Demo Board:
•
•
•
•
•
Board Schematic
Board Layout – Top Layer
Board Layout – Top Metal Layer
Board Layout – Bottom Layer
Board Layout – Bottom Metal Layer
© 2007 Microchip Technology Inc.
DS51646A-page 11
TC110 Boost Converter Demo Board User’s Guide
BOARD SCHEMATIC
M
A.2
D
2
1
G
S
3
DS51646A-page 12
© 2007 Microchip Technology Inc.
Schematics and Layouts
A.3
BOARD – TOP SILK LAYER
© 2007 Microchip Technology Inc.
DS51646A-page 13
TC110 Boost Converter Demo Board User’s Guide
A.4
BOARD – TOP METAL LAYER
DS51646A-page 14
© 2007 Microchip Technology Inc.
Schematics and Layouts
A.5
BOARD – BOTTOM SILK LAYER
© 2007 Microchip Technology Inc.
DS51646A-page 15
TC110 Boost Converter Demo Board User’s Guide
A.6
BOARD – BOTTOM METAL LAYER
DS51646A-page 16
© 2007 Microchip Technology Inc.
TC110 BOOST CONVERTER
DEMO BOARD USER’S GUIDE
Appendix B. Bill Of Materials (BOM)
TABLE B-1:
Qty
2
BILL OF MATERIALS (BOM)
Reference
BT1,BT2
Description
Battery Holder, 1Cell AA PC Mount
Manufacturer
Part Number
®
Keystone Electronics
®
2460
1
C1
CAP 10UF 6.3V Ceramic X5R 0805
Panasonic - ECG
ECJ-2FB0J106M
1
C2
CAP 47UF 8V SPEC Polymer SMD
Panasonic - ECG
EEF-CD0K470R
2
C3, C4
CAP Ceramic 4.7uF 10V X5R 0805
Panasonic - ECG
ECJ-GVB1A475M
1
D1
DIODE Schottky 40V 1A NMP 2P
Panasonic - SSG
MA2Q73600L
1
D2
LED Super Red Clear 0603 SMD
LITE-ON Inc
LTST-C190KRKT
1
L1
Inductor Shield PWR 22 UH SMD
Coiltronics
DR1050-220-R
1
PCB
RoHS Compliant Bare PCB, TC110
Demo Board
Advanced Circuits
104-00122
1
Q1
MOSFET N-CH 20V 5.0A SOT-23
Vishay® Intertechnology
Si2312DS-T1-E3
1
R1
RES 1.00M OHM 1/10W 1% 0603
SMD
Panasonic - ECG
ERJ-3EKF1004V
1
R2
RES 475 OHM 1/10W 1% 0603 SMD
Panasonic - ECG
ERJ-3EKF4750V
1
R3
RES 5.11K OHM 1/10W 1% 0603
SMD
Panasonic - ECG
ERJ-3EKF5111V
1
S1
Switch Toggle SPDT 3A PC MNT 4PC E-Switch
200MSP3T1B1M2QEH
1
S2
Switch DIP 1-POS Half Pitch SMD
Copal Electronics Inc
CHS-01TB
8
TP1, TP2, TP3,
TP4, TP5, TP6,
TP7, TP8
PC Test Point Compact SMT
Keystone Electronics
5016
1
U1
PFM/PWM Step-Up DC/DC Converter Microchip Technology
Inc.
TC110503ECT
1
U2
IC Controller LI-ION 4.2V SOT23-5
MCP73832T-2ACI/OT
Note 1:
Microchip Technology
Inc.
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.
© 2007 Microchip Technology Inc.
DS51646A-page 17
WORLDWIDE SALES AND SERVICE
AMERICAS
ASIA/PACIFIC
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EUROPE
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Technical Support:
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Web Address:
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Taiwan - Hsin Chu
Tel: 886-3-572-9526
Fax: 886-3-572-6459
China - Shenzhen
Tel: 86-755-8203-2660
Fax: 86-755-8203-1760
Taiwan - Kaohsiung
Tel: 886-7-536-4818
Fax: 886-7-536-4803
China - Shunde
Tel: 86-757-2839-5507
Fax: 86-757-2839-5571
Taiwan - Taipei
Tel: 886-2-2500-6610
Fax: 886-2-2508-0102
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
UK - Wokingham
Tel: 44-118-921-5869
Fax: 44-118-921-5820
China - Xian
Tel: 86-29-8833-7250
Fax: 86-29-8833-7256
12/08/06
DS51646A-page 18
© 2007 Microchip Technology Inc.