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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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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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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