MCP7383X
Li-Ion System
Power Path Management
Reference Design
© 2008 Microchip Technology Inc.
DS51746A
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Microchip is willing to work with the customer who is concerned about the integrity of their code.
•
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Trademarks
The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro,
PICSTART, PRO MATE, rfPIC and SmartShunt are registered
trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.
FilterLab, Linear Active Thermistor, MXDEV, MXLAB,
SEEVAL, SmartSensor and The Embedded Control Solutions
Company are registered trademarks of Microchip Technology
Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, CodeGuard,
dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, In-Circuit Serial
Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB
Certified logo, MPLIB, MPLINK, mTouch, PICkit, PICDEM,
PICDEM.net, PICtail, PIC32 logo, PowerCal, PowerInfo,
PowerMate, PowerTool, REAL ICE, rfLAB, Select Mode, Total
Endurance, UNI/O, WiperLock and ZENA are trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2008, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
DS51746A-page ii
© 2008 Microchip Technology Inc.
LI-ION SYSTEM PPM
REFERENCE DESIGN
Table of Contents
Preface ........................................................................................................................... 1
Introduction............................................................................................................ 1
Document Layout .................................................................................................. 1
Conventions Used in this Guide ............................................................................ 2
Recommended Reading........................................................................................ 3
The Microchip Web Site ........................................................................................ 3
Customer Support ................................................................................................. 3
Document Revision History ................................................................................... 3
Chapter 1. Product Overview
1.1 Introduction ..................................................................................................... 5
1.2 What is the Li-Ion Battery Charger System Power Path Management
Reference Design? ................................................................................... 6
1.3 What the Li-Ion Battery Charger System Power Path Management Reference
Design kit Includes ................................................................................... 6
Chapter 2. Installation and Operation
2.1 Introduction ..................................................................................................... 7
2.2 Features ......................................................................................................... 7
2.3 Getting Started ............................................................................................... 8
Appendix A. Schematic and Layouts
A.1 Introduction .................................................................................................. 11
A.2 Board – Schematic ....................................................................................... 12
A.3 Board – Top Layer ....................................................................................... 13
A.4 Board – Top Metal Layer ............................................................................. 13
A.5 Board – Bottom Layer ................................................................................. 14
Appendix B. Bill Of Materials (BOM)
Worldwide Sales and Service .................................................................................... 16
© 2008 Microchip Technology Inc.
DS51746A-page iii
Li-Ion System PPM Reference Design
NOTES:
DS51746A-page iv
© 2008 Microchip Technology Inc.
LI-ION SYSTEM PPM
REFERENCE DESIGN
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
Li-Ion System PPM Reference Design. 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 Li-Ion System PPM Reference Design 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 Li-Ion System
PPM Reference Design.
• 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 Li-Ion System PPM Reference Design.
• Appendix B. “Bill Of Materials (BOM)” – Lists the parts used to build the Li-Ion
System PPM Reference Design.
© 2008 Microchip Technology Inc.
DS51746A-page 1
Li-Ion System PPM Reference Design
CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:
DOCUMENTATION CONVENTIONS
Description
Arial font:
Italic characters
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
#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}
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 code supplied by
user
DS51746A-page 2
Examples
File>Save
Press <Enter>, <F1>
var_name [,
var_name...]
void main (void)
{ ...
}
© 2008 Microchip Technology Inc.
Preface
RECOMMENDED READING
This user's guide describes how to use Li-Ion System PPM Reference Design. The following Microchip document is recommended as supplemental reference resources.
MCP73832 Data Sheet, “Miniature Single-Cell, Fully Integrated Li-Ion, Li-Polymer
Charge Management Controllers”, DS21984
This data sheet provides detailed information regarding the MCP73832 product family.
MCP73833 Data Sheet, “Stand-Alone Linear Li-Ion / Li-Polymer Charge Management Controller”, DS22005
This data sheet provides detailed information regarding the MCP73833 product family
AN1149, “Design A Load Sharing System Power Path Management
with Microchip’s Stand-Alone Li-Ion Battery Charger”, DS01149
This application note provides general information regarding designing with Microchip’s
stand-alone Li-Ion / Li-Polymer charge management controller product family.
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 (July 2008)
• Initial Release of this Document.
© 2008 Microchip Technology Inc.
DS51746A-page 3
Li-Ion System PPM Reference Design
NOTES:
DS51746A-page 4
© 2008 Microchip Technology Inc.
LI-ION SYSTEM PPM
REFERENCE DESIGN
Chapter 1. Product Overview
1.1
INTRODUCTION
Portable electronics has played an important role in modern era. Due to the natural
characteristics of Li-Ion / Li-Polymer batteries, they are the most popular power
sources for mobile devices. However, extra care in design is always important to
implement Li-Ion / Li-Polymer batteries. System Power Path Management allows
end-users to charge their batteries without interruption. This reference design is
developed to assist product designers in reducing product design cycle and time by
utilizing Microchip’s favorite stand-alone Li-Ion battery charge management controllers
with system power path management.
This chapter provides an overview of the Li-Ion Battery Charger System Power Path
Management Reference Designand covers the following topics:
• “What is the Li-Ion Battery Charger System Power Path Management Reference
Design?”
• “What the Li-Ion Battery Charger System Power Path Management Reference
Design Kit includes.
”
RPULL
V IN
1
2
CIN
RLED1
RLED2
RLED3
3
4
7
V DD
VBAT
STAT2
/PG
+
THERM
PROG
8
System
Load
-
V SS 5
MCP73833
FIGURE 1-1:
COUT
Li-Ion
Cell
STAT1
D1
10
9
V DD
Q1
Thermistor
6
RPROG
MCP73833 With System Power Path Management Application.
© 2008 Microchip Technology Inc.
DS51746A-page 5
Li-Ion System PPM Reference Design
1.2
WHAT IS THE LI-ION BATTERY CHARGER SYSTEM POWER PATH
MANAGEMENT REFERENCE DESIGN?
The Li-Ion Battery Charger System Power Path Management Reference Design
demonstrates the features of Microchip’s MCP73832 “Miniature Single-Cell, Fully Integrated Li-Ion, Li-Polymer Charge Management Controllers” and MCP73833 “Miniature
Single-Cell, Fully Integrated Li-Ion, Li-Polymer Charge Management Controllers” with
the load sharing system power path management capability.
There are two independent circuits on the reference design. First circuit is designed
with MCP73832, which allows maximum programmable fast charge current up to
500 mA. The second circuit is designed with MCP73833, which allows maximum
programmable fast charge current up to 1A and has a power good indicator and an
additional status output. Two preset values of fast charge current are available for each
circuit by a SPDT dip on the board for users to experience different speed.
Note:
Please refer to Table 2-1 for Charge Status Outputs and Table 2-2 for
charge current setups.
Both circuits come with load sharing system power path management feature. This
feature allows a DC Power Source to support system load while charging a Li-Ion
battery. When the DC Power Source is absent, the Li-Ion battery will support system
load and stop charging.
The Li-Ion Battery Charger System Power Path Management Reference Design is
designed to observe the performance and features on the circuits via multiple test
points. Circuits can also be implemented into suitable applications without additional
work.
1.3
WHAT THE LI-ION BATTERY CHARGER SYSTEM POWER PATH
MANAGEMENT REFERENCE DESIGN KIT INCLUDES
This Li-Ion Battery Charger System Power Path Management Reference Design kit
includes:
• Li-Ion Battery Charger System Power Path Management Reference Design,
102-00120
• Analog and Interface Products Demonstration Boards CD-ROM (DS21912)
- Li-Ion System PPM Reference Design, DS51746
- MCP73833 Data Sheet, “Miniature Single-Cell, Fully Integrated Li-Ion,
Li-Polymer Charge Management Controllers”, DS21984
- MCP73832 Data Sheet, “Stand-Alone Linear Li-Ion / Li-Polymer Charge Management Controller”, DS22005
DS51746A-page 6
© 2008 Microchip Technology Inc.
LI-ION SYSTEM PPM
REFERENCE DESIGN
Chapter 2. Installation and Operation
2.1
INTRODUCTION
The Li-Ion Battery Charger System Power Path Management Reference Design
demonstrates Microchip's stand-alone Linear Li-Ion Battery Chargers - MCP73832 and
MCP73833 while allowing input power source to operate the system load. The system
load can also be supported by the Li-Ion battery when input power is disconnected. A
number of device options allow the MCP73832 and the MCP73833 to be utilized in a
variety of applications. Please refer to the MCP73832 data sheet (DS21984) and
MCP73833 data sheet (DS22005) for device options.
Typical applications for the reference design are Smart Phones, PDA, Portable Media
Players, MP3 Players, Digital Cameras, Handheld Medical devices, Bluetooth headsets, Ultra-Mobile PC and Portable Communicators.
2.2
FEATURES
The Li-Ion Battery Charger System Power Path Management Reference Design has
the following features:
• Load sharing system power path management that support charging single cell
Li-Ion battery and system load at the same time without affecting charging
algorithm of Microchip’s stand-alone charge management controllers.
• The system load is supported by Li-Ion battery when input power source is
removed
• Blue LED indicates charge status
• Additional Red LED to indicate Power-Good (PG) and Green LED to indicate
charge complete (Available from MCP73833)
• Dip Switch to select programmable fast charge current between1000 mA (H) and
50 mA (L) for MCP73833 and 400 mA (H) and 25 mA (L) for MCP73832
• Available THERM pin on the MCP73833 for temperature monitoring with a
thermister. It is disabled by default and can be enabled to use with NTC
thermister.
• Preconditioning of deeply depleted cells.
• Internal Safety Timer (available from MCP73833)
• Automatic Charge Termination
• Automatic Recharge
• Thermal Regulation
• Small DFN packages with Exposed Pad as additional heat sink.
© 2008 Microchip Technology Inc.
DS51746A-page 7
Li-Ion System PPM Reference Design
2.3
GETTING STARTED
The Li-Ion Battery Charger System Power Path Management Reference Design is fully
assembled and tested for charging a single-cell Li-Ion or Li-Polymer battery with or
without system load.
2.3.1
Power Input and Output Connection
2.3.1.1
POWERING THE LI-ION BATTERY CHARGER SYSTEM POWER PATH
MANAGEMENT REFERENCE DESIGN
1. Connect the positive battery terminal to VBAT+ and negative battery terminal to
VBAT-.
2. Connect the 5V DC power supply Negative Terminal to VSS.
3. Connect the 5V DC power supply Positive Terminal to VDD.
4. It should initiate the battery charging cycle when the power source is present.
5. Position the DIP Switch to “H” for 400 mA fast charge current rate of MCP73832
and 1000 mA fast charge current rate of MCP73833.
6. Position the DIP Switch to “L” for 25 mA fast charge current rate of MCP73832
and 50 mA fast charge current rate of MCP73833.
Note:
Fast Charge Current can be programmed with various resistors that based
on the Figure 2-1 and Figure 2-2.
Note:
The Li-Ion battery pack can be replaced with test circuit or electronic load
that can sink current with DC power supply. Please refer to Figure 2-3.
7. Connected positive of load to System Load on the board and negative of load to
either VSS or VBAT-. The load can be a power resistor or E-Load.
8. Remove DC power supply, the load should be supported by the Li-Ion battery
now.
Charge Current (mA)
Note:
MCP73832 circuit is labeled “A” on the reference design while MCP73833
circuit is labeled “B” on the reference design.
1000
900
800
700
600
500
400
300
200
100
0
1
1
3
5
7
9
11
13
15
17
19
Programming Resistor (k:)
FIGURE 2-1:
(RPROG).
DS51746A-page 8
MCP73833 Charge Current (IOUT) vs. Programming Resistor
© 2008 Microchip Technology Inc.
Installation and Operation
1
FIGURE 2-2:
(RPROG).
MCP73832 Charge Current (IOUT) vs. Programming Resistor
FIGURE 2-3:
Simulated Battery Load.
© 2008 Microchip Technology Inc.
DS51746A-page 9
Li-Ion System PPM Reference Design
1
FIGURE 2-4:
TABLE 2-1:
Board Top Assembly.
MCP73833 CHARGE STATUS OUTPUTS
STAT1 (BLUE)
STAT2
(GREEN)
PG (RED)
Shutdown
OFF
OFF
OFF
Standby
OFF
OFF
ON
Charge in Progress
ON
OFF
ON
Charge Complete (EOC)
OFF
ON
ON
Temperature Fault
OFF
OFF
ON
Timer Fault
OFF
OFF
ON
System Test Mode
ON
ON
ON
CHARGE CYCLE STATE
TABLE 2-2:
MCP73832 CHARGE STATUS OUTPUTS
CHARGE CYCLE STATE
DS51746A-page 10
STAT (BLUE)
Shutdown
OFF
No Battery Present
OFF
Preconditioning
ON
Constant-Current Fast Charge
ON
Constant Voltage
ON
Charge Complete - Standby
OFF
© 2008 Microchip Technology Inc.
LI-ION SYSTEM PPM
REFERENCE DESIGN
Appendix A. Schematic and Layouts
A.1
INTRODUCTION
This appendix contains the following schematics and layouts for the Li-Ion Battery
Charger System Power Path Management Reference Design:
•
•
•
•
Board – Schematic
Board – Top Layer
Board – Top Metal Layer
Board – Bottom Layer
© 2008 Microchip Technology Inc.
DS51746A-page 11
Li-Ion System PPM Reference Design
BOARD – SCHEMATIC
M
A.2
DS51746A-page 12
© 2008 Microchip Technology Inc.
Schematic and Layouts
A.3
BOARD – TOP LAYER
A.4
BOARD – TOP METAL LAYER
© 2008 Microchip Technology Inc.
DS51746A-page 13
Li-Ion System PPM Reference Design
A.5
BOARD – BOTTOM LAYER
DS51746A-page 14
© 2008 Microchip Technology Inc.
LI-ION SYSTEM PPM
REFERENCE DESIGN
Appendix B. Bill Of Materials (BOM)
TABLE B-1:
Qty
BILL OF MATERIALS (BOM)
Reference
Description
BUMPON HEMISPHERE .44X.20
WHITE
Manufacture
3M
Part Number
4
Bump
SJ5003-9-ND
4
C1, C2, C3, C4
CAP CERAMIC 4.7 uF 10 X5R 0603
Taiyo Yuden
LMK107BJ475KA-T
2
LED1, LED2
Blue Water Clear 0603 SMD LED
Para Light USA
L-C191LBCT-U1
1
LED3
True Green Water Clear 0603 SMD
LED
Para Light USA
L-C191LGCT-U1
1
LED4
Super Red Water Clear 0603 SMD
LED
Para Light USA
L-C191KRCT-U1
1
PCB
Printed Circuit Board
—
104-00184-R1
4
R1, R4, R5, R6
RES 221 OHM 1/10W 1% 0603 SMD
Panasonic®
1
R2
RES 41.2K OHM 1/10W 1% 0603
SMD
Panasonic - ECG
ERJ-3EKF4122V
1
R3
RES 2.49K OHM 1/10W 1% 0603
SMD
Panasonic - ECG
ERJ-3EKF2491V
3
R7, R10, R11
RES 10K OHM 1/10W 1% 0603 SMD
Panasonic - ECG
ERJ-3EKF1002V
1
R8
RES 1K OHM 1/10W 1% 0603 SMD
Panasonic - ECG
ERJ-3EKF1001V
1
R9
RES 20K OHM 1/10W 1% 0603 SMD
Panasonic - ECG
ERJ-3EKF2002V
2
SW1, SW2
SWITCH SLIDE SPDT SMD J-LEAD
Copal Electronics Inc
CJS-1200TA
10
TP1, TP2, TP3,
TP4, TP5, TP6,
TP7, TP8, TP9,
TP10
PC Test Point Compact SMT
Keystone Electronics®
5016
1
U1
Miniature Single Cell, Fully Integrated
Li-Ion, Li-Polymer Charge Management
Microchip Technology Inc MCP73832-2ATI/MC
1
U2
Stand-Alone Linear Li-Ion / Li-Polymer Microchip Technology Inc MCP73833-AMI/MF
Charge Management Controller
2
U3, U4
MOSFET/SCHOTTKY P-CH
MICROFET2X2
Note 1:
- ECG
ERJ-3EKF2210V
Fairchild Semiconductor® FDFMA2P857
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.
© 2008 Microchip Technology Inc.
DS51746A-page 15
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China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Taiwan - Kaohsiung
Tel: 886-7-536-4818
Fax: 886-7-536-4803
China - Xiamen
Tel: 86-592-2388138
Fax: 86-592-2388130
Taiwan - Taipei
Tel: 886-2-2500-6610
Fax: 886-2-2508-0102
China - Xian
Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
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 - Zhuhai
Tel: 86-756-3210040
Fax: 86-756-3210049
01/02/08
DS51746A-page 16
© 2008 Microchip Technology Inc.