MCP7383X Li-Ion System Power Path Management Reference Design © 2008 Microchip Technology Inc. DS51746A

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 Trademarks applications and the like is provided only for your convenience The Microchip name and logo, the Microchip logo, Accuron, and may be superseded by updates. It is your responsibility to dsPIC, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, ensure that your application meets with your specifications. PICSTART, PROMATE, rfPIC and SmartShunt are registered MICROCHIP MAKES NO REPRESENTATIONS OR trademarks of Microchip Technology Incorporated in the WARRANTIES OF ANY KIND WHETHER EXPRESS OR U.S.A. and other countries. IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, FilterLab, Linear Active Thermistor, MXDEV, MXLAB, INCLUDING BUT NOT LIMITED TO ITS CONDITION, SEEVAL, SmartSensor and The Embedded Control Solutions QUALITY, PERFORMANCE, MERCHANTABILITY OR Company are registered trademarks of Microchip Technology FITNESS FOR PURPOSE. Microchip disclaims all liability Incorporated in the U.S.A. arising from this information and its use. Use of Microchip Analog-for-the-Digital Age, Application Maestro, CodeGuard, devices in life support and/or safety applications is entirely at dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, the buyer’s risk, and the buyer agrees to defend, indemnify and ECONOMONITOR, FanSense, In-Circuit Serial hold harmless Microchip from any and all damages, claims, Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB suits, or expenses resulting from such use. No licenses are Certified logo, MPLIB, MPLINK, mTouch, PICkit, PICDEM, conveyed, implicitly or otherwise, under any Microchip PICDEM.net, PICtail, PIC32 logo, PowerCal, PowerInfo, intellectual property rights. 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 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 “Save project before build” dialog Underlined, italic text with A menu path File>Save right angle bracket Bold characters A dialog button Click OK A tab Click the Power tab N‘Rnnnn A number in verilog format, 4‘b0010, 2‘hF1 where N is the total number of digits, R is the radix and n is a digit. 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 Choice of mutually exclusive errorlevel {0|1} character: { | } arguments; an OR selection Ellipses... Replaces repeated text var_name [, var_name...] Represents code supplied by void main (void) user { ... } DS51746A-page 2 © 2008 Microchip Technology Inc.

Preface RECOMMENDED READING This user's guide describes how to use Li-Ion System PPM Reference Design. The fol- lowing 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 Manage- ment 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 Q1 D1 VIN 1 10 VDD VBAT + CIN 2 VDD 9 COUT Li-Ion SLoyasdtem Cell RLED1 3 STAT1 VSS 5 - RLED2 Thermistor 4 STAT2 THERM 8 RLED3 7 6 /PG PROG RPROG MCP73833 FIGURE 1-1: 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 Inte- grated 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 500mA. 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 Table2-1 for Charge Status Outputs and Table2-2 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 Man- agement 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 head- sets, 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 between1000mA (H) and 50mA (L) for MCP73833 and 400mA (H) and 25mA (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 V and negative battery terminal to BAT+ V . BAT- 2. Connect the 5V DC power supply Negative Terminal to V . SS 3. Connect the 5V DC power supply Positive Terminal to V . DD 4. It should initiate the battery charging cycle when the power source is present. 5. Position the DIP Switch to “H” for 400mA fast charge current rate of MCP73832 and 1000mA fast charge current rate of MCP73833. 6. Position the DIP Switch to “L” for 25mA fast charge current rate of MCP73832 and 50mA fast charge current rate of MCP73833. Note: Fast Charge Current can be programmed with various resistors that based on the Figure2-1 and Figure2-2. 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 Figure2-3. 7. Connected positive of load to System Load on the board and negative of load to either V or V . The load can be a power resistor or E-Load. SS BAT- 8. Remove DC power supply, the load should be supported by the Li-Ion battery now. Note: MCP73832 circuit is labeled “A” on the reference design while MCP73833 circuit is labeled “B” on the reference design. 1000 900 ) A 800 m ( 700 t n 600 e r r 500 u C 400 e g 300 r a h 200 C 100 1 0 1 3 5 7 9 11 13 15 17 19 Programming Resistor (k(cid:58)) FIGURE 2-1: MCP73833 Charge Current (I ) vs. Programming Resistor OUT (R ). PROG DS51746A-page 8 © 2008 Microchip Technology Inc.

Installation and Operation 1 FIGURE 2-2: MCP73832 Charge Current (IOUT) vs. Programming Resistor (R ). PROG FIGURE 2-3: Simulated Battery Load. © 2008 Microchip Technology Inc. DS51746A-page 9

Li-Ion System PPM Reference Design 1 FIGURE 2-4: Board Top Assembly. TABLE 2-1: MCP73833 CHARGE STATUS OUTPUTS STAT2 CHARGE CYCLE STATE STAT1 (BLUE) PG (RED) (GREEN) 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 TABLE 2-2: MCP73832 CHARGE STATUS OUTPUTS CHARGE CYCLE STATE STAT (BLUE) Shutdown OFF No Battery Present OFF Preconditioning ON Constant-Current Fast Charge ON Constant Voltage ON Charge Complete - Standby OFF DS51746A-page 10 © 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 A.2 BOARD – SCHEMATIC MM 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: BILL OF MATERIALS (BOM) Qty Reference Description Manufacture Part Number 4 Bump BUMPON HEMISPHERE .44X.20 3M SJ5003-9-ND WHITE 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 Para Light USA L-C191LGCT-U1 LED 1 LED4 Super Red Water Clear 0603 SMD Para Light USA L-C191KRCT-U1 LED 1 PCB Printed Circuit Board — 104-00184-R1 4 R1, R4, R5, R6 RES 221 OHM 1/10W 1% 0603 SMD Panasonic® - ECG ERJ-3EKF2210V 1 R2 RES 41.2K OHM 1/10W 1% 0603 Panasonic - ECG ERJ-3EKF4122V SMD 1 R3 RES 2.49K OHM 1/10W 1% 0603 Panasonic - ECG ERJ-3EKF2491V SMD 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, PC Test Point Compact SMT Keystone Electronics® 5016 TP4, TP5, TP6, TP7, TP8, TP9, TP10 1 U1 Miniature Single Cell, Fully Integrated Microchip Technology Inc MCP73832-2ATI/MC Li-Ion, Li-Polymer Charge Manage- ment 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 Fairchild Semiconductor® FDFMA2P857 MICROFET2X2 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. © 2008 Microchip Technology Inc. DS51746A-page 15

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