Microchip Technology MCP73871 User Manual

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MCP73871

Evaluation Board

User’s Guide

Page 2

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in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates.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 devices in life support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.

Trademarks

The Microchip name and logo, the Microchip logo, Accuron, dsPIC, K

EELOQ, KEELOQ logo, MPLAB, PIC, PICmicro,

PICSTAR T, rfPIC and SmartShunt are registered trademarks of Microchip T echnology 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, PIC

logo, PowerCal, PowerInfo, PowerMate, PowerT ool, 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.

Printed on recycled paper.

Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and T empe, Arizona; Gresham, Oregon and design centers in California and India. The Company’s quality system processes and procedures are for its PIC devices, Serial EEPROMs, microperipherals, nonvolatile memo ry and analog products. In addition, Microchip’s quality system for the desig n and manufacture of development systems is ISO 9001:2000 certified.

MCUs and dsPIC® DSCs, KEELOQ

code hopping

Page 3

MCP73871 EVALUATION 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

1.1 Introduction .....................................................................................................5

1.2 What is the MCP73871 Evaluation Board? .................................................... 6

1.3 What the MCP73871 Evaluation Board 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

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MCP73871 Evaluation Board User’s Guide

NOTES:

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MCP73871 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 Select the Help menu, and then Topics to open a list of available on-line help files.

IDE on-line help.

INTRODUCTION

This chapter contains general information that will be useful to know before using the MCP73871 Evaluation Board User’s Guide. 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 MCP73871 Evaluation Board User’s Guide as a development tool to emulate and debug firmware on a t arget board. Th e manual la yout is as follows:

• Chapter 1. “Product Overview” – Importa nt information about the MCP73871 Evaluation Board User’s Guide.

• 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 MCP73871 Evaluation Board User’s Guide.

• Appendix B. “Bill Of Materials (BOM)” – Lists the parts used to build the MCP73871 Evaluation Board User’s Guide.

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MCP73871 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 Referenced books MPLAB® IDE User’s Guide

Emphasized text ...is the only compiler...

Initial caps A window the Output window

A dialog the Settings dialog A menu selection select Enable Programmer

Quotes A field name in a window or

dialog

Underlined, italic text with right angle bracket

Bold characters A dialog button Click OK

N‘Rnnnn A number in verilog format,

Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>

Courier New font:

Plain Courier New Sample source code #define START

Italic Courier New A variable argument file.o, where file can be

Square brackets [ ] Optional arguments mcc18 [options] file

Curly brackets and pipe character: { | }

Ellipses... Replaces repeated text var_name [,

A menu path File>Save

A tab Click the Power tab

where N is the total number of digits, R is the radix and n is a digit.

Filenames autoexec.bat File paths c:\mcc18\h Keywords _asm, _endasm, static Command-line options -Opa+, -Opa- Bit values 0, 1 Constants 0xFF, ‘A’

Choice of mutually exclusive arguments; an OR selection

Represents code supplied by user

“Save project before build”

4‘b0010, 2‘hF1

any valid filename

[options] errorlevel {0|1}

var_name...] void main (void)

{ ... }

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. Lo cal 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

Preface

DOCUMENT REVISION HISTORY

Revision A (August 2008)

• Initial Release of this Document.

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MCP73871 Evaluation Board User’s Guide

NOTES:

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Chapter 1. Product Overview

STAT1 LBO

IN OUT

BAT

Single-Cell Li-Ion Battery

MCP73871 Typical Application

1, 20

18, 19

10 µF

10, 11, EP

Ac-dc Adapter or USB Port

STAT2

THERM

PROG1

PROG3

PROG1

14, 15, 16

470Ω

4.7 µF

System Load

SEL

PROG2

Low

PROG3

VPCC

NTC

10 kΩ

Low

4.7 µF

1.1 INTRODUCTION

Space and complexity are two key concerns in portable electronic design. The hig hly integrated MCP73871 device has overcome the hurdles by including the required elements to meet the design challenges when developing new Li-Ion / Li-Polymer batter y powered products.

The MCP73871 requires minimum external comp onents to power the system load and charge single cell Li-Ion batteries independently. When input power is absent or insufficient, the Li-Ion battery becomes the primary power source or in help mode to support the required system load current. The MCP73871 Evaluation Board is developed to assist product designers in reducing product design cycle and time by utilizing Microchip’s favorite stand-alone Li-Ion battery charger and system load sharing management controller.

This chapter provides an overview of the MCP73871 Evaluation Boardand covers the following topics:

• “What is the MCP73871 Evaluation Board?”

• “What the MCP73871 Evaluation Board Kit includes”

MCP73871 EVALUATION BOARD

USER’S GUIDE

FIGURE 1-1: MCP73871 With System Power Path Management Application.

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MCP73871 Evaluation Board User’s Guide

1.2 WHAT IS THE MCP73871 EVALUATION BOARD?

The MCP73871 Evaluation Board demonstrates the features of Microchip’s MCP73871

“Stand-alone Lin ear Li-Ion / Li-Poly Battery Charge and System Load Sh aring Management Controller”.

The MCP73871 Evaluation Board is designed to deliver minimum 1.5A total cur rent to system load and to a single cell Li-Ion batte ry at 4.2V p reset volt ag e re gulation. (4.1V,

4.35V and 4.4V options are also available for MCP73871) The MCP73871 Evaluation Board has two dip switches to control input current limits. First dip switch (SW2) determines input power source between ac-dc adapter and USB port (AC/USB). Second dip switch (SW1) determines 500 mA high power USB port or 100 mA low power USB port (High/Low). The input current limit is governed by USB specification when selecting USB on SW2.

The maximum fast current when AC is selected on SW2 is programmed by resistor (R

The MCP73871 Evaluation Board of fers three status LED for two charge st atus outputs and a power good indicator.

The MCP73871 Evaluation Board comes with factory preset low battery indicator (LBO) when input is absent. The preset value is 3.1V and STAT1 LED turns on when battery voltage is below the threshold voltage.

The MCP73871 Evaluation Board is designed to observe the performance and features on the circuits via multiple test points. Circuit s can also be implemented into suitable applications without additional work.

) at 1A and termination current is set at 100 mA by (R

PROG1

Note: Please refer to Table 2-1 for charge status outputs and Figure 2-1 for

charge current setups.

PROG3

Note: For evaluation LBO purpose, connect a DC power supply and set VDD

below UVLO. The LBO lights up when V

drops below threshold voltage.

BAT

1.3 WHAT THE MCP73871 EVALUATION BOARD KIT INCLUDES

This MCP73871 Evaluation Board kit includes:

• MCP73871 Evaluation Board, 102-00183

• Analog and Interface Products Demonstration Boards CD-ROM (DS21912)

- MCP73871 Evaluation Board User’s Guide User’s Guide (DS51755)

- MCP73871 Data Sheet, “Stand-Alone Linear Li-Ion / Li-Poly Battery Charge and System Load Sharing Management Controller” (DS22090)

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Chapter 2. Installation and Operation

2.1 INTRODUCTION

The MCP73871 Evaluation Board demonstrates Microchip's st and-alone linear Li-Ion battery charger with system power path and load sharing mana gement control solution. The system load is also supported by the Li-Ion batt er y whe n th e inp ut pow er is disconnected. A number of device options allow the MCP73871 to be utilized in a variety of applications. Refer to the MCP73871 Dat a Sheet ( DS220 90 ) and/o r con tact local Microchip supports for additional device options.

Typica l applications fo r the r eference desig n are Smart Phon es, PDA, Portab le Media Players, MP3 Players, Digital Cameras, Handheld Medical devices, Bluetooth headsets, Ultra-Mobile PC and Portable Communicators.

2.2 FEATURES

The MCP73871 Evaluation Board has the following features:

• Integrated System Load Sharing

• Input Current Limit Control with dip switches between ac-dc adapter (Typical

1650 mA), USB-High (Maximum 500 mA) and USB-Low (Maximum 100 mA)

• Three LED indicates charge status, low battery and power good signal

• Preset Li-Ion battery charge voltage: 4.2V

• Temperature monitoring is disabled by default, but can be enabled to use with

NTC thermister

• Factory preset 0.1C preconditio nin g curren t of de e ply dep leted cells

• Factory preset 6 hour Safety Timer with Timer Enable feature

• Constant Current / Constant Voltage (CC/CV) charge algorithm

• Resistor programmed maximum charge current: 1A

• Resistor programmed termination set point: 100 mA

• Automatic Charge Termination

• Automatic Recharge

• Internal Thermal Regulation

• Exposed Pad with extra via underneath for better heat dissipations

MCP73871 EVALUATION BOARD

USER’S GUIDE

±0.5%

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MCP73871 Evaluation Board User’s Guide

2.3 GETTING STARTED

The MCP73871 Evaluation Board 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 MCP73871 EVALUATION BOARD

1. Connect the positive battery terminal to V terminal to V

(TP1 or TP5).

2. Connect the 5V - 6V DC power supply Negative Terminal to V

3. Connect the 5V - 6V DC power supply Positive Terminal to V

(TP4) and negative battery

BAT+

(TP1 or TP5).

(TP2).

4. Connected positive of load to OUT (TP3) on the board and negative of load to either V

(TP1 or TP5). The system load can be a power resistor or E-Load.

5. The maximum current that system load requires should not violate the specification of Li-Ion battery manufacturer (Typical at 1C or less) or 1A for safety and performance concerns.

6. It should initiate the battery charging cycle when drive CE (TP6) high. Drive CE (TP6) low disables the Li-Ion battery charger function.

7. Position the DIP Switch #2 (SW2) to “AC” allows maximum input current of 1.8A to support both system load and Li-Ion battery charger at 1000 mA fast charge current rate.

8. Position the DIP Switch #2 (SW2) to “USB” limits the input current to meet USB specifications.

9. When DIP Switch #2 (SW2) is positioned at USB; position the DIP Switch #1 (SW1) to “High” limits total input cur rent to 500 mA and “Low” for maximum input current at 100 mA.

Note: Fast Charge Current and Termination Current can be easily programmed

with various resistors that based on the Figure 2-1. 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 2-2.

10. Remove DC power supply, the load should be supported by the Li-Ion battery now.

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Installation and Operation

100

200

300

400

500

600

700

800

900

1000

1 3 5 7 9 1113151719

Programming Resistor (kΩ)

Charge Current (mA)

FIGURE 2-1: MCP73833 Charge Current (I (R

FIGURE 2-2: Simulated Battery Load.

PROG

0V-6V Power Source

Volt Meter

GND

R 5ȍ 10W

) vs. Programming Resistor

OUT

Amp Meter

1000 ȝF

BAT+

BAT-

Microchip

Battery Charge

Management

Controller

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MCP73871 Evaluation Board User’s Guide

FIGURE 2-3: MCP73871 Board Layout and Dimensions.

TABLE 2-1: MCP73871 CHARGE STATUS OUTPUTS

CHARGE CYCLE STATE STAT1 (Green) STAT2 (Red) PG (Blue)

Shutdown OFF OFF OFF Standby OFF OFF ON Charge in Progress ON OFF ON Charge Complete (EOC) OFF ON ON Temperature Fault ON ON ON Timer Fault ON ON ON Low Battery Indicator (LBO) ON OFF OFF No Battery Present OFF OFF ON No Input Power OFF OFF OFF

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Appendix A. Schematic and Layouts

A.1 INTRODUCTION

This appendix contains the following schematics and layouts for the MCP73871 Evaluation Board:

• Board – Schematic Sheet

• Board – Top Layer

• Board – Top Metal Layer

• Board – Bottom Layer

MCP73871 EVALUATION BOARD

USER’S GUIDE

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MCP73871 Evaluation Board User’s Guide

A.2 BOARD – SCHEMATIC

Page 17

A.3 BOARD – TOP LAYER

Schematic and Layouts

A.4 BOARD – TOP METAL LAYER

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MCP73871 Evaluation Board User’s Guide

A.5 BOARD – BOTTOM LAYER

Page 19

MCP73871 EVALUATION BOARD

USER’S GUIDE

Appendix B. Bill Of Materials (BOM)

TABLE B-1: BILL OF MATERIALS (BOM)

Qty Reference Description Manufacturer Part Number

4 Bump BUMPON HEMISPHERE 0.44 X 0.20

WHITE 3 C1, C2, C3 CAP CERAMIC 4.7 μF 10 X5R 0603 Taiyo Yuden 1 LED1 True Green Water Clear 0603 SMD

LED 1 LED2 Super Red Water Clear 0603 SMD

LED 1 LED3 Blue Water Clear 0603 SMD LED Para Light USA L-C191LBCT-U1 1 PCB Printed Circuit Board Microchip Technology Inc. 104-00183-R1 4 R1, R3, R4, R5 RES 1K OHM 1/10W 1% 0603 SMD Panasonic 2 R2, R6 RES 10K OHM 1/10W 1% 0603 SMD Panasonic - ECG ERJ-3EKF1002V 2 SW1, SW2 SWITCH SL IDE SPDT SMD J-LEAD Copal Electronics Inc CJS-1200TA 6 TP1, TP2, TP3,

TP4, TP5, TP6

1 U1 Stand-Alone System Load Sharing

PC Test Point Compact SMT Keystone Electronics

and Li-Ion / Li-Polymer Battery Charge

Management Controller; 4.2V Charge

Voltage Regulation Option

Note: 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.

3M SJ5003-9-ND

Para Light USA L-C191LGCT-U1

Para Light USA L-C191KRCT-U1

- ECG ERJ-3EKF1001V

Microchip Technology, Inc MCP73871-2CCI/ML

LMK107BJ475KA-T

5016

Page 20

WORLDWIDE SALES AND SERVICE

AMERICAS

Corporate Office

2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Te chnical Support: http://support.microchip.com Web Address: www.microchip.com

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ASIA/PACIFIC

Asia Pacific Office

Suites 3707-14, 37th Floor

To wer 6, The Gateway

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Tel: 852-2401-1200

Fax: 852-2401-3431

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Fax: 61-2-9868-6755

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ASIA/PACIFIC

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Taiwan - Taipei

Tel: 886-2-2500-6610 Fax: 886-2-2508-0102

Thailand - Bangkok

Tel: 66-2-694-1351 Fax: 66-2-694-1350

EUROPE

Austria - Wels

Tel: 43-7242-2244-39 Fax: 43-7242-2244-393

Denmark - Copenhagen

Tel: 45-4450-2828 Fax: 45-4485-2829

France - Paris

Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79

Germany - Munich

Tel: 49-89-627-144-0 Fax: 49-89-627-144-44

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

01/02/08

Microchip Technology MCP73871 User Manual

Preface

INTRODUCTION

DOCUMENT LAYOUT

CONVENTIONS USED IN THIS GUIDE

RECOMMENDED READING

THE MICROCHIP WEB SITE

CUSTOMER SUPPORT

DOCUMENT REVISION HISTORY

Chapter 1. Product Overview

1.1 INTRODUCTION

1.2 WHAT IS THE MCP73871 EVALUATION BOARD?

1.3 WHAT THE MCP73871 EVALUATION BOARD KIT INCLUDES

Chapter 2. Installation and Operation

2.1 INTRODUCTION

2.2 FEATURES

2.3 GETTING STARTED

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

Appendix B. Bill Of Materials (BOM)

WORLDWIDE SALES AND SERVICE