MICROCHIP MCP73831 Evaluation Board User Guide

User Guide for MICROCHIP models including: MCP73831 Evaluation Board, MCP73831, Evaluation Board

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51596a

MCP73831 Evaluation Board
User's Guide

DS51596A

Note the following details of the code protection feature on Microchip devices: · Microchip products meet the specification contained in their particular Microchip Data Sheet.
· Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions.
· There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip's Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
· Microchip is willing to work with the customer who is concerned about the integrity of their code.
· Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as "unbreakable."
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip's code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.

Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip's products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.

Trademarks
The Microchip name and logo, the Microchip logo, Accuron, dsPIC, KEELOQ, microID, MPLAB, PIC, PICmicro, PICSTART, PRO MATE, PowerSmart, rfPIC, and SmartShunt are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.
AmpLab, FilterLab, Migratable Memory, MXDEV, MXLAB, PICMASTER, 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, dsPICDEM, dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, Linear Active Thermistor, MPASM, MPLIB, MPLINK, MPSIM, PICkit, PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal, PowerInfo, PowerMate, PowerTool, Real ICE, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel, 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.
© 2005, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona and Mountain View, California in October 2003. The Company's quality system processes and procedures are for its PICmicro® 8-bit MCUs, 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.

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MCP73831 EVALUATION BOARD USER'S GUIDE
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 ................................................................................................. 4 Document Revision History ................................................................................... 4
Chapter 1. Product Overview
1.1 Introduction ..................................................................................................... 5 1.2 What is the MCP73831 Evaluation Board? .................................................... 6 1.3 What the MCP73831 Evaluation 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
Appendix B. Bill Of Materials (BOM) Worldwide Sales and Service .................................................................................... 18

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MCP73831 Evaluation Board User's Guide
NOTES:

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MCP73831 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.
INTRODUCTION
This chapter contains general information that will be useful to know before using the MCP73831 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 MCP73831 Evaluation Board. The manual layout is as follows: · Chapter 1. "Product Overview" Important information about the MCP73831
Evaluation Board. · Chapter 2. "Installation and Operation" Includes instructions on how to get
started with this evaluation kit and a description of the evaluation boards. · Appendix A. "Schematic and Layouts" Shows the schematic and layout
diagrams for the MCP73831 Evaluation Board. · Appendix B. "Bill Of Materials (BOM)" Lists the parts used to build the
MCP73831 Evaluation Board.

DS51596A-page 1

MCP73831 Evaluation Board User's Guide

CONVENTIONS USED IN THIS GUIDE
This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description

Represents

Examples

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
Italic Courier New Square brackets [ ] Curly brackets and pipe character: { | } Ellipses...

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"
File>Save

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
Press <Enter>, <F1>

Sample source code Filenames File paths Keywords Command-line options Bit values Constants A variable argument
Optional arguments
Choice of mutually exclusive arguments; an OR selection Replaces repeated text
Represents code supplied by user

#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) { ... }

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Preface
RECOMMENDED READING
This user's guide describes how to use the MCP73831 Evaluation Board. The following Microchip documents are available and recommended as supplemental reference resources. MCP73831 Data Sheet, "Miniature Single-Cell, Fully-Integrated Li-Ion, Li-Polymer Charge-Management Controller", (DS21984) This data sheet provides detailed information regarding the MCP73831 product family. AN947, "Power Management in Portable Applications: Charging Lithium-Ion/Lithium-Polymer Batteries", (DS00947) This application note provides general information regarding charging Li-Ion batteries. AN971, "USB Port-Powered Li-Ion/Li-Polymer Battery Charging", (DS00971) This application note provides general information regarding charging Li-Ion batteries from a USB port.
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

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MCP73831 Evaluation Board User's Guide
CUSTOMER SUPPORT
Users of Microchip products can receive assistance through several channels: · Distributor or Representative · Local Sales Office · Field Application Engineer (FAE) · Technical Support · Development Systems Information Line 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 (December 2005) · Initial Release of this Document.

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MCP73831 EVALUATION BOARD USER'S GUIDE
Chapter 1. Product Overview
1.1 INTRODUCTION
The MCP73831 Evaluation Board is used to evaluate Microchip's MCP73831 in simple, stand-alone Li-Ion battery charging applications. Two circuit boards are provided in the MCP73831 Evaluation Kit for evaluation of various device options. This chapter covers the following topics: · What is the MCP73831 Evaluation Board? · What the MCP73831 Evaluation Kit Includes

VIN 1 F

500 mA Li-Ion Battery Charger

4 VDD

VBAT

3 1 F

5 PROG

470

1 STAT

2 k 2 VSS

MCP73831

FIGURE 1-1:

Typical MCP73831 Application.

+ Single Li-Ion
- Cell

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MCP73831 Evaluation Board User's Guide
1.2 WHAT IS THE MCP73831 EVALUATION BOARD?
The MCP73831 Evaluation Board is an evaluation and demonstration tool for Microchip's MCP73831 miniature single-cell, fully-integrated Li-Ion, Li-Polymer charge-management controllers. Two evaluation boards are provided in the MCP73831 Evaluation Kit. The boards are set up to evaluate simple, stand-alone, linear charging of single-cell Li-Ion / Li-Polymer battery packs (the battery packs are not included). Each board design provides constant current charging followed by constant voltage charging with automatic charge termination. In addition, the MCP73831-2AC board provides preconditioning of deeply depleted cells. Each board design provides evaluation of the MCP73831 in two package options: a SOT23-5 and a 2 mm x 3 mm, 8-Lead DFN for higher power handling capability. When connected, these evaluation boards allow for the evaluation of the MCP73831 devices in a variety of applications.
1.3 WHAT THE MCP73831 EVALUATION KIT INCLUDES
This MCP73831 Evaluation Kit includes: · Two MCP73831 Evaluation Boards, 102-00085 · MCP73831 Evaluation Board User's Guide, DS51596 · MCP73831 Data Sheet, "Miniature Single-Cell, Fully-Integrated Li-Ion, Li-Polymer
Charge-Management Controller", DS21984 · AN947, "Power Management in Portable Applications: Charging
Lithium-Ion/Lithium-Polymer Batteries", DS00947 · AN971, "USB Port-Powered Li-Ion/Li-Polymer Battery Charging", DS00971

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MCP73831 EVALUATION BOARD USER'S GUIDE
Chapter 2. Installation and Operation
2.1 INTRODUCTION
The MCP73831 Evaluation Board demonstrates Microchip's MCP73831. The MCP73831 is a miniature single-cell, fully-integrated Li-Ion/Li-Polymer charge-management controller. A number of device options allow the MCP73831 to be utilized in a variety of applications. Refer to the MCP73831 data sheet (DS21984) for device options.
2.2 FEATURES
The MCP73831 Evaluation Kit contains two boards for evaluation of various device options. The boards have the following features with the factory installed devices: · Charge Voltage: 4.20V · Programmable Fast Charge Current up to 500 mA · Preconditioning of deeply depleted cells (MCP73831-2AC)
- Preconditioning Threshold Voltage: 2.8V - Preconditioning Current: 10% of Programmed Fast Charge Current · No Preconditioning (MCP73831-2DC) · Automatic Charge Termination - Charge termination by minimum current in Constant Voltage Mode - Termination Current: 7.5% of Programmed Fast Charge Current · Automatic Recharge - Recharge Threshold Voltage: 4.05V · Charge Current Monitor for Fuel Gauging · Thermal Regulation · Reverse Discharge Protection · Evaluation in SOT23-5 Package · Evaluation in 2 mm x 3 mm, 8-Lead DFN package for higher power handling capability · Simple Stand-Alone Operation · Powered from external bench supply or voltage regulated wall cube · Surface-Mount Design · Fully Assembled and Tested

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MCP73831 Evaluation Board User's Guide
2.3 GETTING STARTED
The MCP73831 Evaluation Boards are fully assembled and tested for charging single-cell, Li-Ion/Li-Polymer battery packs. The boards provide the appropriate charge algorithm for simple, stand-alone operation. The boards require the use of an external input voltage source (5V ±10%, recommended) and external load (battery pack or simulated battery load).
2.3.1 Power Input and Output Connections
2.3.1.1 POWERING A MCP73831 EVALUATION BOARD
1. Apply the input voltage source to the appropriate circuit for evaluation. The input voltage source should be limited to the 0V to +6V range. For normal operation, the input voltage should be between +4.5V and +6V. The input voltage must not exceed an absolute maximum of +7V.
2. Connect the positive side of the input source (+) to VDD of the circuit being evaluated. Connect the negative or return side of the input source (-) to VSS of the circuit being evaluated. Refer to Figure 2-1.

Battery Pack or Simulated Battery Load

+ _

_ Input Power Supply
+ 5.2V

FIGURE 2-1:

Setup Configuration Diagram.

2.3.1.2 APPLYING THE LOAD TO A MCP73831 EVALUATION BOARD
1. To apply a load to a MCP73831 Evaluation Board, the positive side of the load (B+) should be connected to VBAT of the circuit being evaluated. The negative or return side of the load (B-) should be connected to VSS of the circuit being evaluated. Care should be taken when using electronic loads or ground referenced loads.
2. For the MCP73831-2AC board, the charge management controller will only provide 10% of the programmed fast charge current if the battery terminal voltage (VBAT) is less than 2.8V with respect to VSS. Using a purely resistive load will not work for preconditioning and fast charge currents. The best way to evaluate the charge management circuit is to use a single-cell Li-Ion battery pack, or the recommended simulated battery load. Refer to Figure 2-2.

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Installation and Operation

B+

+ 1,000 F 10V Al

5 2 W

B-

+ Variable Power Supply
_ 0V - 6V

FIGURE 2-2:

Simulated Battery Load.

2.3.1.3 SETTING THE FAST CHARGE CURRENT
1. As provided, the MCP73831 Evaluation Boards have two fast charge current settings: 100 mA and 500 mA. The default fast charge current setting is 100 mA. By jumpering PROG to VSS of the circuit being evaluated, the fast charge current is set to 500 mA.
2. Alternatively, the appropriate programming resistor can be changed in the hardware to obtain the desired fast charge current setting. Resistor R3 should be changed for the SOT23 circuit, and resistor R8 should be changed for the DFN circuit. Refer to the MCP73831 data sheet for choosing the appropriate value programming resistor for the desired fast charge current.

2.3.1.4 STATUS INDICATORS
1. The MCP73831 Evaluation Boards have two LED status indicators for each circuit being evaluated. Table 2-1 represents the state of the status indicators during various states of the charge cycle. ON indicates that the respective LED is illuminated.

TABLE 2-1: STATUS INDICATORS
Charge Cycle State
Qualification Preconditioning Constant Current Fast Charge Constant Voltage Charge Complete Battery Disconnected Input Voltage Source Removed Input Voltage Source Below UVLO Shutdown

Red LED
ON ON ON ON OFF ON OFF ON ON

Green LED
ON OFF OFF OFF ON ON OFF ON ON

2.3.1.5 CHARGE CURRENT MONITOR
1. The MCP73831 Evaluation Boards have a charge current monitor for each circuit being evaluated. The charge current monitor can be used as a coulomb counter for fuel gauging. The charge current is equivalent to the voltage at CHARGE MONITOR with respect to VSS divided by the value of the programming resistor in kilo-ohms. For example, the default programming resistor is 10 k. If the measured voltage at CHARGE MONITOR is 1V, the charge current is equal to 1 divided 10, or 100 mA. If the measured voltage at CHARGE MONITOR is 100 mV, the charge current is 0.1 divided by 10, or 10 mA.

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MCP73831 Evaluation Board User's Guide
2.3.1.6 DEVICE SUPPORT OPTIONS 1. The MCP73831 Evaluation Boards are capable of supporting all of the available
MCP73831 device options. The factory installed devices are the MCP73831-2AC and the MCP73831-2DC. Refer to the MCP73831 data sheet for available device options and details regarding the installed device options.

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MCP73831 EVALUATION BOARD USER'S GUIDE
Appendix A. Schematic and Layouts
A.1 INTRODUCTION
This appendix contains the following schematic and layouts for the MCP73831 Evaluation Boards. Diagrams included in this appendix: · Board Schematic · Board - Assembly Drawing · Board - Top Overlay · Board - Top Layer · Board - Bottom Layer

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MCP73831 Evaluation Board User's Guide

FIGURE A-1:

Board Schematic.

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Schematic and Layouts

TP12

R6 R8 D3 R10 TP11

TP10

TP4

TP5

TP6

TP7 C4 R7 R9 D4

D1 R2 R4 C3

R1 D2 R3 R5

TP9

TP8

TP3

TP2

TP1

FIGURE A-2:

Board - Assembly Drawing.

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MCP73831 Evaluation Board User's Guide

TP1

TP6

R1 D2 R3 R5

TP2

TP5

D1 R2 R4 C3

TP3

TP4

C1 U1 C2

TP7 C4 R7 R9 D4

TP10

TP8

R6 R8 D3 R10 TP11

TP9

TP12

C5 U2 C6

FIGURE A-3:

Board - Top Overlay.

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Schematic and Layouts

FIGURE A-4:

Board - Top Layer.

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MCP73831 Evaluation Board User's Guide

FIGURE A-5:

Board - Bottom Layer.

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MCP73831 EVALUATION BOARD USER'S GUIDE
Appendix B. Bill Of Materials (BOM)

TABLE B-1: BILL OF MATERIALS (BOM)

Qty.

Reference

C1,C2,C5,C6

C3,C4

D1,D4

D2,D3

R1,R2,R9,R10

R3,R8

R4,R7

R5,R6

12 TP1-TP12

Description
4.7uF, X5R Ceramic, 10V, 0805 0.1uF, X7R Ceramic, 16V, 0603 Super Red LED, 0603 Green LED, 0603 221, 1/10W, Chip Resistor, 0603 10.0k, 1/10W, Chip Resistor, 0603 2.49k, 1/10W, Chip Resistor, 0603 100k, 1/10W, Chip Resistor, 0603 Surface Mount Test Point, 5016 Miniature Li-Ion Charger, SOT23-5

Miniature Li-Ion Charger, 2X3DFN8

Bump-ons

Printed Circuit Board

Note 1: Installed device option is indicated on board.

Mfgr. Panasonic®-ECG Panasonic-ECG Lumex Lumex Panasonic-ECG Panasonic-ECG Panasonic-ECG Panasonic-ECG Keystone Microchip Technology Inc. Microchip Technology Inc. 3M Advanced Circuits

Part Number
ECJ-GVB1A475M ECJ-1VB1C104K LTST-C190KRKT LTST-C190KGKT ERJ-3EK2210V ERJ-3EK1002V ERJ-3EK2491V ERJ-3EK1003V 5016 MCP73831-2ACI/OT MCP73831-2DCI/OT (1) MCP73831-2ACI/MC MCP73831-2DCI/MC (1) SJ5003 104-00085-R1

DS51596A-page 17

WORLDWIDE SALES AND SERVICE

AMERICAS
Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: http://support.microchip.com Web Address: www.microchip.com
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ASIA/PACIFIC
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ASIA/PACIFIC
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EUROPE
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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

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References

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