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DS51729A-page ii © 2008 Microchip Technology Inc. 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in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates.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 me ets 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 fr om such use. No licenses are conveyed, implicitly or ot herwise, under any Microchip intellectual property rights. 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, PIC 32 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. Note the following details of the code protection feature on Microchip devices:

Microchip products meet the specification cont ained in their particular Microchip Data Sheet.
Microchip believes that its family of products is one of the mo st 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 me thods 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 semico nductor 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. 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.

MCP7381X LI-ION BATTERY CHARGER EVALUATION BOARD USER’S GUIDE © 2008 Microchip Technology Inc. DS51729A-page iii Table of Contents Chapter 1. Product Overview 1.3 What the MCP7381X Li-Ion Battery Charger Evaluation Board Kit Includes . 7 Chapter 2. Installation and Operation Appendix A. Schematic and Layouts Appendix B. Bill Of Materials (BOM)

MCP7381X LI-ION BATTERY CHARGER EVALUATION BOARD USER’S GUIDE © 2008 Microchip Technology Inc. DS51729A-page 1 Preface INTRODUCTION This chapter contains general information that will be useful to know before using the MCP7381X 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 MCP7381X Li-Ion Battery Charger Evaluation 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 MCP7381X Li-Ion Battery Charger Evaluation 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. “Schematic and Layouts” – Shows the schematic and layout diagrams for the MCP7381X Li-Ion Battery Charger Evaluation Board.
Appendix B. “Bill Of Materials (BOM)” – Lists the parts used to build the MCP7381X Li-Ion Battery Charger Evaluation Board. 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.

MCP7381X Li-Ion Battery Charger Evaluation Board User’s Guide DS51729A-page 2 © 2008 Microchip Technology Inc. CONVENTIONS USED IN THIS GUIDE This manual uses the following documentation conventions: RECOMMENDED READING This user's guide describes how to use MCP7381X Li-Ion Battery Charger Evaluation Board. The following Microchip documents are available and recommended as supplemental reference resources. MCP73811/2 Data Sheet, “Simple, Miniature Single-Cell, Fully Integrated Li-Ion / Li-Polymer Charge Management Controllers”, DS22036 This data sheet provides detailed information regarding the MCP73811/2 product family. DOCUMENTATION CONVENTIONS Description Represents Examples Arial font: Italic characters Referenced books MPLAB® IDE User’s Guide 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 “Save project before build” Underlined, italic text with right angle bracket A menu path File>Save Bold characters A dialog button Click OK A tab Click the Power tab N‘Rnnnn A number in verilog format, where N is the total number of digits, R is the radix and n is a digit. 4‘b0010, 2‘hF1 Text in angle brackets < > A key on the keyboard Press <Enter>, <F1> Courier New font: Plain Courier New Sample source code #define START Filenames autoexec.bat File paths c:\\mcc18\\h Keywords _asm, _endasm, static Command-line options -Opa+, -Opa- Bit values 0, 1 Constants 0xFF, ‘A’ Italic Courier New A variable argument file.o, where file can be any valid filename Square brackets [ ] Optional arguments mcc18 [options] file [options] Curly brackets and pipe character: { | } Choice of mutually exclusive arguments; an OR selection errorlevel {0|1} Ellipses... Replaces repeated text var_name [, var_name...] Represents code supplied by user void main (void) { ...

© 2008 Microchip Technology Inc. DS51729A-page 3 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 (April 2008)
Initial Release of this Document.

1.1 INTRODUCTION

The MCP7381X Li-Ion Battery Charger Evaluation Board demonstrates the features and abilities for Microchip’s MCP7381X Li-Ion Battery Charger Evaluation Board Sim- ple, Miniature Single-Cell, Fully Integrated Li-Ion / Li-Polymer Charge Management Controllers. The MCP73811/2 are standalone highly integrated linear Li-Ion battery chargers that employ a constant current/constant voltage (CCCV) charge algorithm for cost sensitive and space limited applications. The MCP7381X Li-Ion Battery Charger Evaluation Board has two independent circuits that are available to evaluate an USB port powered Li-Ion / Li-Polymer battery charger and an ac-dc wall adapter powered Li-Ion / Li-Polymer battery charger. For an ac-dc wall adapter powered battery charger, an external resistor (R PROG) sets the magnitude of the charge current up to 500 mA. When the USB port provides power to the battery charger, the MCP73811 specifically adheres to the current limits governed by the USB specification. The PROG pin selects two preset charge current rates of typical 85 mA (Low) or 450 mA (High) and does not exceed 100 mA (Low) or 500 mA (High) maximum charge current. As for USB regulation, a device may draw either low-power at one unit load or high-power at 5 unit loads. A unit load is defined to be 100 mA. The drawn current per unit load is an absolute maximum value, not an average over time. This chapter covers the following topics:

“What is the MCP7381X Li-Ion Battery Charger Evaluation Board?”
“What the MCP7381X Li-Ion Battery Charger Evaluation Board Kit includes.” FIGURE 1-1: MCP73812 Typical Application. CE VDD VSS PROG VBAT + Single Li-Ion Cell MCP73812 CIN Li-Ion Battery Charger RPROG COUT REGULATED WALL CUBE

1.2 WHAT IS THE MCP7381X LI-ION BATTERY CHARGER EVALUATION

BOARD? The MCP7381X Li-Ion Battery Charger Evaluation Board demonstrates the use of the MCP73811/2 Simple, Miniature Single-Cell, Fully Integrated Li-Ion / Li-Polymer Charger Management Controllers. The MCP7381X Li-Ion Battery Charger Evaluation Board is setup to evaluate low cost single-cell Li-Ion / Li-Polymer battery chargers. This board utilizes Microchip's MCP7381X Li-Ion Battery Charger Evaluation Board that efficiently charge Li-Ion / Li-Polymer batteries with a preset +1% voltage accuracy regulation at 4.2V. The MCP7381X Li-Ion Battery Charger Evaluation Board comes with two pre-installed cir- cuits: An ac-dc adapter powered Li-Ion /Li-Polymer battery charger and an USB port powered Li-Ion / Li-Polymer battery charger. The MCP73811 is available for the USB port powered circuit while the MCP73812 is designed for the ac-dc wall adapter powered circuit. A SOT-23-5 MCP73811 is pre-installed on the evaluation board with a mechanical dip switch which selects charge current High (450 mA) or Low (85 mA) for the USB port powered battery charger system. A SOT23-5 MCP73812 is pre-installed on the evaluation board with a pro- gramming resistor R PROG which delivers 500 mA from the ac-dc wall adapter source. When the Chip Enable (CE) pin is in “High” condition, that particular circuit is ready to charge single-cell Li-Ion batteries. The two dashed silk screen areas on the evaluation board show the required circuit size for the printed circuit board (PCB) layout and provide system / product designers a visual aid prior design the system. The MCP7381X Li-Ion Battery Charger Evaluation Board is designed to observe the performance and features via multiple test points that are available on the circuits. Users are able to discover the compact size of the layout in addition to the device itself. The circuit can also be implemented into suitable applications without any additional works.

1.3 WHAT THE MCP7381X LI-ION BA TTERY CHARGER EVALUATION BOARD

The MCP7381X Li-Ion Battery Charger Evaluation Board kit includes:

MCP7381X Li-Ion Battery Charger Evaluation Board, 102-00172
Pre-installed 5-Lead SOT-23 MCP73811, 5-Lead SOT-23 MCP73812 and required components.
Analog and Interface Products Demonstration Boards CD-ROM (DS21912) - MCP7381X Li-Ion Battery Charger Evaluation Board User’s Guide, (DS51729) - MCP73811/2 Data Sheet, “Simple, Miniature Single-Cell, Fully Integrated Li-Ion / Li-Polymer Charge Management Controllers”, (DS22036) Note: The systems are designed in operation mode with CE pin High and can be disabled when driving CE pin Low.

2.1 INTRODUCTION

The MCP7381X Low-Cost Li-Ion Battery Charger Evaluation Board demonstrates Microchip's Simple, Miniature Single-Cell, Fully Integrated Li-Ion / Li-Polymer Charge Management Controllers, MCP73811 and MCP73812. The MCP73811 is powered from USB port to charge Li-Ion / Li-Polymer batteries. The charge current is logic selectable between High (500 mA) and Low (100 mA). The MCP73812 is designed to charge Li-Ion / Li-Polymer batteries with programmable charging current up to 500 mA by a single resistor from a regulated 5V ac-dc wall adapter. The MCP73811/2 require only minimum components to implement a completed circuit of Li-Ion / Li-Polymer battery charge management in any systems. The development of MCP73811/2 meets the challenges of today’s cost-sensitive and space-limited applica- tions. The MCP7381X Low-Cost Li-Ion Battery Charger Evaluation Board comes with a pre-installed 5-Lead SOT-23 MCP73811 and a pre-installed 5-Lead SOT-23 MCP73812. Typical applications for MCP73811/2 are Rechargeable Toys, Low-Cost Lithium-Ion / Lithium-Polymer Battery Chargers, Electronic Cigarettes, Rechargeable Portable Electronic Devices, Bluetooth Headsets or USB Chargers.

2.2 FEATURES

The MCP7381X Low-Cost Li-Ion Battery Charger Evaluation Board has the following features:

Color coded test points ensuring the proper connections: Red for V DD and VBAT+; Black for GND & VBAT-;White for CE (Chip Enable).
2-position Dip Switch for charge cu rrent selections between USB_Low and USB_High.
Chip Enable (CE) Pin to disable the system when drive Low.
Evaluating different charge current rates by changing R PROG (Programming Resistor) values. See Figure 2-1

2.3 GETTING STARTED

The MCP7381X Low-Cost Li-Ion Battery Charger Evaluation Board is fully assembled and tested for charging single-cell Li-Ion / Li-Polymer batteries with a regulated 5V DC source or USB port.

2.3.1 Power Input and Output Connection

2.3.1.1 POWERING THE MCP7381X LO W-COST LI-ION BATTERY CHARGER

Connect the negative battery terminal to V BAT- pin on the evaluation board and positive battery terminal to VBAT+ pin on the evaluation board. 2. Connect 5V DC power supply negative terminal to GND pin on the evaluation board. 3. Connect 5V DC power supply positive terminal to V DD pin on the evaluation board. Slowly increase the supply voltage to 5V. 4. The battery charge cycle initiates when minimum supply voltage is present. The charge current can be measured by placing a current meter in series between VBAT+ pin on the evaluation board and positive battery terminal. 5. Position the DIP Switch to USB_Hi for a maximum charge rate up to 500 mA and USB_Low for maximum charge rate up to 100 mA. 100 150 200 250 300 350 400 450 500 550 2 4 6 8 10 12 14 16 18 20 Programming Resistor (kΩ) Charge Current (mA) Note: Make sure the current limit of the DC power supply is not set below the charge current. Note: Remove protection film before using the DIP Switch. This may be done by the manufacturer prior shipping.

Installation and Operation © 2008 Microchip Technology Inc. DS51729A-page 11 6. Fast Charge Current for MCP73812 ca n be programmed with various resistors that based on the Figure 2-1. RPROG is represented as R1 on the evaluation board. 7. Pull CE pin on the evaluation board Low to disable the system or terminate the charge. FIGURE 2-2: MCP7831X Low Cost Li-Ion Battery Charger Evaluation Board Top Silk Layout. Note: The battery can be replaced with test circuit or electronic load that can sink current with DC power supply.

MCP7381X LI-ION BATTERY CHARGER EVALUATION BOARD USER’S GUIDE © 2008 Microchip Technology Inc. DS51729A-page 13 Appendix A. Schematic and Layouts A.1 INTRODUCTION This appendix contains the following schematics and layouts for the MCP7381X Low Cost Li-Ion Battery Charger Evaluation Board:

Board – Schematic
Board – Top Layer
Board – Top Metal Layer
Board – Bottom Layer

MCP7381X LI-ION BATTERY CHARGER EVALUATION BOARD USER’S GUIDE © 2008 Microchip Technology Inc. DS51729A-page 17 Appendix B. Bill Of Materials (BOM) TABLE B-1: BILL OF MATERIALS (BOM) QTY Reference Description Manufacture MFG PART # 4 C1, C2, C3, C4 CAP CERAMIC 2.2 μF 10V X5R 0603 SMD Taiyo Yuden LMK107BJ225KA-T 1 R1 RES 2K OHM 1/10W 1% 0603 SMD Yageo Corp. RC0603FR-072KL

2 R2, R3 RES 100K OHM 1/10W 1% 0603

Panasonic - ECG ERJ-3EKF1003V

1 SW1 SWITCH SLIDE SPDT SMD J-LEAD COPAL ELECTRONICS

4 Bump BUMPON HEMISPHERE.44X.20 WHITE 3M SJ5003-9-ND

1 U1 Simple, Miniature Single-Cell, Fully

Integrated Li-Ion / Li-Polymer Charge Management controllers: Programma- ble Charge Current Microchip Technology, Inc MCP73812T-420I/OT

1 U2 Simple, Miniature Single-Cell, Fully

Integrated Li-Ion / Li-Polymer Charge Management controllers: Selectable Charge Current Microchip Technology, Inc MCP73811T-420I/OT

1 PCB Printed Circuit Board — 104-00172-R1

Note 1: 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.

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Product Information

MCP7381X specifications and overview.

Summary

Low-Cost Li-Ion Battery Charger Evaluation Board User?셲 Guide 01/02/08

Description

Low-Cost Li-Ion Battery Charger Evaluation Board User?셲 Guide 01/02/08

Source title MCP7381X Datasheet(PDF) - Microchip Technology

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