MCP73830L 2x2 TDFN
Li-Ion Battery Charger
Evaluation Board
User’s Guide
© 2011 Microchip Technology Inc.
DS51992A
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DS51992A-page 2
© 2011 Microchip Technology Inc.
MCP73830L 2X2 TDFN LI-ION BATTERY
CHARGER EVALUATION BOARD
USER’S GUIDE
Table of Contents
Preface ........................................................................................................................... 5
Introduction............................................................................................................ 5
Document Layout .................................................................................................. 5
Conventions Used in this Guide ............................................................................ 6
Recommended Reading........................................................................................ 7
The Microchip Web Site ........................................................................................ 7
Customer Support ................................................................................................. 7
Document Revision History ................................................................................... 7
Chapter 1. Product Overview
1.1 Introduction ..................................................................................................... 9
1.2 What is the MCP73830L 2x2 TDFN Li-Ion Battery Charger
Evaluation Board? .............................................................................................. 10
1.3 What the MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board
Kit Includes ......................................................................................................... 10
Chapter 1. Installation and Operation
1.1 Introduction ................................................................................................... 11
1.2 Features ....................................................................................................... 11
1.3 Getting Started ............................................................................................. 12
Appendix A. Schematic and Layouts
A.1 Introduction .................................................................................................. 13
A.2 Board – Schematic ....................................................................................... 14
A.3 Board – Top Layer ....................................................................................... 15
A.4 Board – Top Copper ................................................................................... 15
A.5 Board – Bottom Copper ............................................................................... 16
Appendix B. Bill of Materials
Worldwide Sales and Service .................................................................................... 18
© 2011 Microchip Technology Inc.
DS51992A-page 3
MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board User’s Guide
DS51992A-page 4
© 2011 Microchip Technology Inc.
MCP73830L 2X2 TDFN LI-ION BATTERY
CHARGER 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
“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
MCP73830L 2x2 TDFN Li-Ion Battery Charger 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 MCP73830L 2x2 TDFN Li-Ion Battery
Charger Evaluation Board. The manual layout is as follows:
• Chapter 1. “Product Overview” – Important information about the MCP73830L
2x2 TDFN Li-Ion Battery Charger Evaluation Board.
• Chapter 1. “Installation and Operation” – Includes instructions on how to get
started with MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board and
a description of the user’s guide.
• Appendix A. “Schematic and Layouts” – Shows the schematic and layout
diagrams for the MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board.
• Appendix B. “Bill of Materials” – Lists the parts used to build the MCP73830L
2x2 TDFN Li-Ion Battery Charger Evaluation Board.
© 2011 Microchip Technology Inc.
DS51992A-page 5
MCP73830L 2x2 TDFN Li-Ion Battery Charger 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
DS51992A-page 6
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)
{ ...
}
© 2011 Microchip Technology Inc.
Preface
RECOMMENDED READING
This user's guide describes how to use MCP73830L 2x2 TDFN Li-Ion Battery Charger
Evaluation Board. Other useful documents are listed below. The following Microchip
documents are available and recommended as supplemental reference resources.
• MCP73830L Data Sheet - “Single-Cell Li-Ion/Li-Polymer Battery Charge
Management Controllers in 2x2 TDFN” (DS25049)
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://support.microchip.com.
DOCUMENT REVISION HISTORY
Revision A (August 2011)
• Initial Release of this Document.
© 2011 Microchip Technology Inc.
DS51992A-page 7
MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board User’s Guide
NOTES:
DS51992A-page 8
© 2011 Microchip Technology Inc.
MCP73830L 2X2 TDFN LI-ION BATTERY
CHARGER EVALUATION BOARD
USER’S GUIDE
Chapter 1. Product Overview
1.1
INTRODUCTION
The MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board demonstrates the
features and abilities of Microchip’s MCP73830L Single-Chip Linear Li-Ion Battery
Charger. The MCP73830L is a stand-alone, highly integrated linear battery charge
management controller that employs a constant current / constant voltage (CCCV)
charge algorithm with selectable preconditioning and charge termination. The charge
algorithm is provided for Li-Ion / Li-Polymer battery packs to achieve optimal capacity
in the shortest charging time possible.
The MCP73830L uses an external resistor (RPROG) to set the magnitude of the charge
current up to a maximum of 200 mA.
This chapter covers the following topics:
• “What is the MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board?”
• “What the MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board Kit
Includes.”
1
2
3
1F
© 2011 Microchip Technology Inc.
PROG
STAT
EN
VBAT
VIN
6
5
4
GND
Single Cell
Li-Ion Battery
FIGURE 1-1:
GND
7
1F
MCP73830L Typical Application Circuit.
DS51992A-page 9
MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board User’s Guide
1.2
WHAT IS THE MCP73830L 2X2 TDFN LI-ION BATTERY CHARGER
EVALUATION BOARD?
The MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board demonstrates the
use of Single-Chip Linear Li-Ion Battery Charger with programmable charge current.
The MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board is set up to
evaluate single-cell Li-Ion battery charge management. This board utilizes Microchip's
MCP73830L that effectively charges Li-Ion batteries with high-accuracy, preset-voltage
regulation. The MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board
comes with a pre-installed 2 mm x 2 mm TDFN-6 MCP73830L. This circuit is ready to
charge Li-Ion batteries at a maximum charge current rate up to 200 mA.
A built-in LED is used to display the charge status (STAT).
The MCP73830L has an internal safety timer and will terminate the charge cycle when
the timer has expired.
The MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board is designed to
observe the performance and features on the circuits via multiple test points. Users can
also discover the compact size of the layout in addition to the device itself. The circuit
can also be implemented into suitable applications without additional work.
1.3
WHAT THE MCP73830L 2X2 TDFN LI-ION BATTERY CHARGER
EVALUATION BOARD KIT INCLUDES
This MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board kit includes:
• MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board, 102-00313-R1
• Important Information Sheet
DS51992A-page 10
© 2011 Microchip Technology Inc.
MCP73830L 2X2 TDFN LI-ION BATTERY
CHARGER EVALUATION BOARD
USER’S GUIDE
Chapter 1. Installation and Operation
1.1
INTRODUCTION
The MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board demonstrates
Microchip's stand-alone Linear Li-Ion Battery Charger in a simple and compact design.
The MCP73830L requires only a minimum number of components to implement a
complete battery charge management circuit.
The MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board comes with a
6-pin TDFN MCP73830L pre-installed.
Typical applications for MCP73830L are MP3 players, USB-powered systems,
handheld medical instruments, Bluetooth headsets and portable devices.
1.2
FEATURES
The MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board has the following
features:
•
•
•
•
•
•
2x2 TDFN-6 Package Size
Programmable charge current between 20 mA to 200 mA
A status LED to indicate charge status
EN pin to enable/disable charger
A preset internal safety timer
Built-in Under Voltage Current Limit Control
© 2011 Microchip Technology Inc.
DS51992A-page 11
MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board User’s Guide
1.3
GETTING STARTED
The MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board is fully assembled
and tested for charging a single-cell Li-Ion or Li-Polymer battery with an input supply of
3.75V to 6V.
1.3.1
Power Input and Output Connection
1.3.1.1
POWERING THE MCP73830L 2X2 TDFN LI-ION BATTERY CHARGER
EVALUATION BOARD
1. Connect the positive battery terminal to VBAT and negative battery terminal to
GND.
2. Connect the DC power supply Negative terminal to GND.
3. Connect the 5V DC power supply Positive terminal to VIN.
4. It should initiate the battery charging cycle when the power source is present.
Note:
The battery voltage needs to be below 4.05V (typical) in order to initiate a
new charging cycle.
5. Charging current should be able to read off the multi-meter that is in series with
battery.
Note:
The battery can be replaced with test circuit or electronic load that can sync
current with the DC power supply.
ChargeCurrent(mA)
6. Pulling EN pin high disables charging activities.
7. Fast Charge Current can be programmed with various resistors that are based
on Figure 1-1.
200
180
160
140
120
100
80
60
40
20
0
1
3
5
7
9
11
13
15
ProgrammingResistor(k)
FIGURE 1-1:
DS51992A-page 12
Resistor vs. Charge Current.
© 2011 Microchip Technology Inc.
MCP73830L 2X2 TDFN LI-ION BATTERY
CHARGER EVALUATION BOARD
USER’S GUIDE
Appendix A. Schematic and Layouts
A.1
INTRODUCTION
This appendix contains the following schematics and layouts for the MCP73830L 2x2
TDFN Li-Ion Battery Charger Evaluation Board:
•
•
•
•
Board – Schematic
Board – Top Layer
Board – Top Copper Layer
Board – Bottom Copper Layer
© 2011 Microchip Technology Inc.
DS51992A-page 13
MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board User’s Guide
A.2
BOARD – SCHEMATIC
DS51992A-page 14
© 2011 Microchip Technology Inc.
Schematic and Layouts
A.3
BOARD – TOP LAYER
A.4
BOARD – TOP COPPER
© 2011 Microchip Technology Inc.
DS51992A-page 15
MCP73830L 2x2 TDFN Li-Ion Battery Charger Evaluation Board User’s Guide
A.5
BOARD – BOTTOM COPPER
DS51992A-page 16
© 2011 Microchip Technology Inc.
MCP73830L 2X2 TDFN LI-ION BATTERY
CHARGER EVALUATION BOARD
USER’S GUIDE
Appendix B. Bill of Materials
TABLE B-1:
BILL OF MATERIALS (BOM)
Qty Reference
Description
Manufacturer
Part Number
1
–
2
C1,C2
1
D1
LED ALINGAP RED CLEAR 0805 SMD
Panasonic - ECG
598-8110-107F
1
R1
RES 510 OHM 1/8W 1% 0805 SMD
Panasonic - ECG
ERJ-6ENF5100V
1
R2
RES 2.00K OHM 1/8W 1% 0805 SMD
Panasonic - ECG
ERJ-6ENF2001V
1
U1
Single-Chip Linear Li-Ion Battery Charger Microchip Technology Inc. MCP73830L
Note 1:
Printed circuit board
Microchip Technology Inc. 102-00313
CAP CER 1.0uF 10V 10% X5R 0805
Panasonic® - ECG
GRM219R61A105KC01D
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.
© 2011 Microchip Technology Inc.
DS51992A-page 17
Worldwide Sales and Service
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DS51992A-page 18
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08/02/11
© 2011 Microchip Technology Inc.