li ion battery charger
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2006 Microchip Technology Inc. DS51626A
MCP73833Li-Ion Battery Charger
Evaluation Board
Users Guide
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MCP73833 LI-ION BATTERY
CHARGER EVALUATION BOARD
USERS GUIDE
2006 Microchip Technology Inc. DS51626A-page iii
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 ....................................................................................... 51.1 Introduction ..................................................................................................... 5
1.2 What is the MCP73833 Li-Ion Battery Charger Evaluation Board? ................ 6
1.3 What the MCP73833 Evaluation Kit Includes ................................................. 6
Chapter 2. Installation and Operation ......................................................................... 7
2.1 Introduction ..................................................................................................... 7
2.2 Features ......................................................................................................... 7
2.3 Getting Started ............................................................................................... 8
Appendix A. Schematic and Layouts ........................................................................ 11
A.1 Introduction .................................................................................................. 11
A.2 Board Schematic ........................................................................................ 12A.3 Board - Top Overlay ................................................................................... 13
A.4 Board - Top Layer ...................................................................................... 14
A.5 Board - Bottom Layer ................................................................................. 15
Appendix B. Bill Of Materials (BOM) ......................................................................... 17
Worldwide Sales and Service .................................................................................... 18
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MCP73833 Li-Ion Battery Charger Evaluation Board Users Guide
DS51626A-page 8 2006 Microchip Technology Inc.
2.3 GETTING STARTED
The MCP73833 Li-Ion Battery Charger Evaluation Board has one circuit fully
assembled and tested for charging single cell, Li-Ion/Li-Polymer battery packs. The
board provides the appropriate charge algorithm for simple, stand-alone operation.
The board requires 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 THE MCP73833 LI-ION BATTERY CHARGER 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.
FIGURE 2-1: Setup Configuration Diagram.
2.3.1.2 APPLYING THE LOAD TO THE MCP73833 LI-ION BATTERY CHARGER
EVALUATION BOARD
1. To apply a load to the MCP73833 Li-Ion Battery Charger 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 MCP73833-FCI/MF installed device, the charge management controller
will only provide 10% of the programmed fast charge current if the battery termi-
nal voltage (VBAT) is less than 3.0V with respect to VSS. Using a purely resistive
D5
R4
R8
D3
R1 1
D2
D6
R1
R6
TP 5
TP 3
TP 1
D4 R9
TP 6
R3 R7
TP 4U1
TP 2
TP 7
C3 C4
R1 0
R1 2R1 3
R1 4
TP 8U2
C1 C2
D1 R2
R5
Battery Pack
or
Simulated
Battery Load
+
_Input
Power
Supply +
_
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MCP73833 Li-Ion Battery Charger Evaluation Board Users Guide
DS51626A-page 10 2006 Microchip Technology Inc.
2.3.1.6 DEVICE SUPPORT OPTIONS
1. The MCP73833 Li-Ion Battery Charger Evaluation Board is capable of support-
ing all of the available MCP73833/4 device options. The factory installed device
is the MCP73833-FCI/MF. Refer to the MCP73833/4 data sheet for available
device options and details regarding the installed device options.
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MCP73833 LI-ION BATTERY
CHARGER EVALUATION BOARD
USERS GUIDE
2006 Microchip Technology Inc. DS51626A-page 11
Appendix A. Schematic and Layouts
A.1 INTRODUCTION
This appendix contains the following schematic and layouts for the MCP73833 Li-Ion
Battery Charger Evaluation Board.
Diagrams included in this appendix:
Board Schematic
Board - Top Overlay
Board - Top Layer
Board - Bottom Layer
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MCP73833 Li-Ion Battery Charger Evaluation Board Users Guide
DS51626A-page 14 2006 Microchip Technology Inc.
A.4 BOARD - TOP LAYER
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Schematic and Layouts
2006 Microchip Technology Inc. DS51626A-page 15
A.5 BOARD - BOTTOM LAYER
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