MCP73871 Evaluation Board User’s Guide © 2008 Microchip Technology Inc.
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.
MCP73871 EVALUATION BOARD USER’S GUIDE Table of Contents Preface ........................................................................................................................... 1 Introduction............................................................................................................ 1 Document Layout .................................................................................................. 1 Conventions Used in this Guide ..................................................
MCP73871 Evaluation Board User’s Guide NOTES: DS51755A-page iv © 2008 Microchip Technology Inc.
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.
MCP73871 Evaluation Board User’s Guide CONVENTIONS USED IN THIS GUIDE This manual uses the following documentation conventions: DOCUMENTATION CONVENTIONS Description Arial font: Italic characters Represents Examples 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...
Preface 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.
MCP73871 Evaluation Board User’s Guide NOTES: DS51755A-page 4 © 2008 Microchip Technology Inc.
MCP73871 EVALUATION BOARD USER’S GUIDE Chapter 1. Product Overview 1.1 INTRODUCTION Space and complexity are two key concerns in portable electronic design. The highly integrated MCP73871 device has overcome the hurdles by including the required elements to meet the design challenges when developing new Li-Ion / Li-Polymer battery powered products. The MCP73871 requires minimum external components to power the system load and charge single cell Li-Ion batteries independently.
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 Linear Li-Ion / Li-Poly Battery Charge and System Load Sharing Management Controller”. The MCP73871 Evaluation Board is designed to deliver minimum 1.5A total current to system load and to a single cell Li-Ion battery at 4.2V preset voltage regulation. (4.1V, 4.35V and 4.
MCP73871 EVALUATION BOARD USER’S GUIDE Chapter 2. Installation and Operation 2.1 INTRODUCTION The MCP73871 Evaluation Board demonstrates Microchip's stand-alone linear Li-Ion battery charger with system power path and load sharing management control solution. The system load is also supported by the Li-Ion battery when the input power is disconnected. A number of device options allow the MCP73871 to be utilized in a variety of applications.
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 VBAT+ (TP4) and negative battery terminal to VSS (TP1 or TP5). 2. Connect the 5V - 6V DC power supply Negative Terminal to VSS (TP1 or TP5). 3.
Installation and Operation Charge Current (mA) 1000 900 800 700 600 500 400 300 200 100 0 1 1 3 5 7 9 11 13 15 17 19 Programming Resistor (kΩ) FIGURE 2-1: (RPROG). 0V-6V Power Source MCP73833 Charge Current (IOUT) vs. Programming Resistor Amp Meter Diode Volt Meter R 5ȍ 10W GND FIGURE 2-2: © 2008 Microchip Technology Inc. VBAT+ 1000 ȝF Microchip Battery Charge Management Controller VBAT- Simulated Battery Load.
MCP73871 Evaluation Board User’s Guide FIGURE 2-3: TABLE 2-1: MCP73871 Board Layout and Dimensions.
MCP73871 EVALUATION BOARD USER’S GUIDE 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 © 2008 Microchip Technology Inc.
MCP73871 Evaluation Board User’s Guide BOARD – SCHEMATIC M A.2 DS51755A-page 12 © 2008 Microchip Technology Inc.
Schematic and Layouts A.3 BOARD – TOP LAYER A.4 BOARD – TOP METAL LAYER © 2008 Microchip Technology Inc.
MCP73871 Evaluation Board User’s Guide A.5 BOARD – BOTTOM LAYER DS51755A-page 14 © 2008 Microchip Technology Inc.
MCP73871 EVALUATION BOARD USER’S GUIDE Appendix B. Bill Of Materials (BOM) TABLE B-1: Qty BILL OF MATERIALS (BOM) Reference Description Manufacturer Part Number 4 Bump BUMPON HEMISPHERE 0.44 X 0.20 3M WHITE SJ5003-9-ND 3 C1, C2, C3 CAP CERAMIC 4.
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