Microchip Technology MCP1632 Manuel utilisateur

2014 Microchip Technology Inc. DS50002321A

MCP1632

Single-Cell Li-Ion

Battery Charger Demo Board

User’s Guide

DS50002321A-page 2 2014 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and may be superseded by updates.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 meets 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 from such use. No licenses are

conveyed, implicitly or otherwise, under any Microchip

intellectual property rights.

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.

Microchip received ISO/TS-16949:2009 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.

QUALITY MANAGEMENT S

YSTEM

CERTIFIED BY DNV

== ISO/TS 16949 ==

Trademarks

The Microchip name and logo, the Microchip logo, dsPIC,

FlashFlex, flexPWR, JukeBlox, KEELOQ, KEELOQ logo, Kleer,

LANCheck, MediaLB, MOST, MOST logo, MPLAB,

OptoLyzer, PIC, PICSTART, PIC32 logo, RightTouch, SpyNIC,

SST, SST Logo, SuperFlash and UNI/O are registered

trademarks of Microchip Technology Incorporated in the

U.S.A. and other countries.

The Embedded Control Solutions Company and mTouch are

registered trademarks of Microchip Technology Incorporated

in the U.S.A.

Analog-for-the-Digital Age, BodyCom, chipKIT, chipKIT logo,

CodeGuard, dsPICDEM, dsPICDEM.net, ECAN, In-Circuit

Serial Programming, ICSP, Inter-Chip Connectivity, KleerNet,

KleerNet logo, MiWi, MPASM, MPF, MPLAB Certified logo,

MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient Code

Generation, PICDEM, PICDEM.net, PICkit, PICtail,

RightTouch logo, REAL ICE, SQI, Serial Quad I/O, Total

Endurance, TSHARC, USBCheck, VariSense, ViewSpan,

WiperLock, Wireless DNA, 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.

Silicon Storage Technology is a registered trademark of

Microchip Technology Inc. in other countries.

GestIC is a registered trademarks of Microchip Technology

Germany II GmbH & Co. KG, a subsidiary of Microchip

Technology Inc., in other countries.

All other trademarks mentioned herein are property of their

respective companies.

ISBN: 978-1-63276-756-1

2014 Microchip Technology Inc. DS50002321A-page 3

Object of Declaration: MCP1632 Single-Cell Li-Ion Battery Charger Demo Board

MCP1632 SINGLE-CELL

LI-ION BATTERY CHARGER

DEMO BOARD USER’S GUIDE

DS50002321A-page 4 2014 Microchip Technology Inc.

Table of Contents

Preface ...........................................................................................................................5

Introduction............................................................................................................ 5

Document Layout .................................................................................................. 5

Conventions Used in this Guide ............................................................................ 6

Recommended Reading........................................................................................ 7

The Microchip Web Site ........................................................................................ 7

Customer Support ................................................................................................. 7

Revision History .................................................................................................... 7

Chapter 1. Product Overview

1.1 Introduction ..................................................................................................... 9

1.2 Board Features ............................................................................................... 9

1.3 Device Summary ............................................................................................ 9

1.4 Technical Specifications ............................................................................... 10

1.5 Functional Description .................................................................................. 10

1.6 What Does the MCP1632 Single-Cell Li-Ion Battery Charger Demo Board In-

clude? ..................................................................................................... 11

Chapter 2. Installation and Operation

2.1 Getting Started ............................................................................................. 13

2.1.1 Additional Components Required for Operation ........................................ 13

2.2 Setup Procedure ......................................................................................... 13

2.2.1 Demo Board Output Current Configuration ............................................... 13

2.2.2 Connecting the Single-Cell Battery ........................................................... 14

2.2.3 Powering the Board ................................................................................... 14

2.2.4 Using the Reference Board ....................................................................... 14

2.3 Evaluating the Application ............................................................................ 15

2.4 Firmware description .................................................................................... 15

2.4.1 Main Loop Description ............................................................................... 16

2.4.2 State Machine Description ........................................................................ 17

Appendix A. Schematic and Layouts

A.1 Introduction .................................................................................................. 21

A.2 Board – Schematic ....................................................................................... 22

A.3 Board – Top Silk .......................................................................................... 23

A.4 Board – Top Copper and Silk ....................................................................... 24

A.5 Board – Top Copper .................................................................................... 25

A.6 Board – Bottom Copper ............................................................................... 26

A.7 Board – Bottom Copper and Silk ................................................................. 27

Appendix B. Bill of Materials (BOM)

Worldwide Sales and Service ....................................................................................32

MCP1632 SINGLE-CELL

LI-ION BATTERY CHARGER

DEMO BOARD USER’S GUIDE

2014 Microchip Technology Inc. DS50002321A-page 5

Preface

INTRODUCTION

This chapter contains general information that will be useful to know before using the

MCP1632 Single-Cell Li-Ion Battery Charger Demo Board. Items discussed in this

chapter include:

• Document Layout

• Conventions Used in this Guide

• Recommended Reading

• The Microchip Web Site

• Customer Support

• Revision History

DOCUMENT LAYOUT

This document describes how to use the MCP1632 Single-Cell Li-Ion Battery Charger

Demo Board as a development tool to emulate and debug firmware on a target board,

as well as how to program devices. The document is organized as follows:

•Chapter 1. “Product Overview” – Important information about the MCP1632

Single-Cell Li-Ion Battery Charger Demo 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 MCP1632 Single-Cell Li-Ion Battery Charger Demo Board.

•Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the

MCP1632 Single-Cell Li-Ion Battery Charger Demo 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

“DSXXXXXXXXA”, where “XXXXXXXX” 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 online help.

Select the Help menu, and then Topics to open a list of available online help files.

MCP1632 Single-Cell Li-Ion Battery Charger Demo Board User’s Guide

DS50002321A-page 6 2014 Microchip Technology Inc.

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

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)

{ ...

}

Preface

2014 Microchip Technology Inc. DS50002321A-page 7

RECOMMENDED READING

This user's guide describes how to use the MCP1632 Single-Cell Li-Ion Battery Char-

ger Demo Board. Other useful documents are listed below. The following Microchip

documents are available and recommended as supplemental reference resources.

• MCP1632 Data Sheet – “High-Speed, Low-Side PWM Controller”

(DS20005254)

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://www.microchip.com/support.

REVISION HISTORY

Revision A (November 2014)

• Initial release of this document.

MCP1632 Single-Cell Li-Ion Battery Charger Demo Board User’s Guide

DS50002321A-page 8 2014 Microchip Technology Inc.

NOTES:

MCP1632 SINGLE CELL

LI-ION BATTERY CHARGER

DEMO BOARD USER’S GUIDE

2014 Microchip Technology Inc. DS50002321A-page 9

Chapter 1. Product Overview

1.1 INTRODUCTION

The MCP1632 Single-Cell Li-Ion Battery Charger Demo Board is a step-up/step-down,

switch-mode, DC/DC converter used for battery charging applications. The demo

board provides a 4.2V constant voltage source. Other output voltages can be obtained

with minor modifications to the board’s Bill of Materials (BOM).

The MCP1632 Single-Cell Li-Ion Battery Charger Demo Board is an intelligent battery

charging system for a single-cell Lithium-Ion battery. MCP1632 Single-Cell Li-Ion Bat-

tery Charger Demo Board utilizes Microchip's MCP1632 high-speed Pulse-Width Mod-

ulator (PWM). The 8-pin MCP1632 device contains all the analog components

necessary for a peak current mode control loop including an error amplifier, PWM

comparator and a high-current driver output pin.

An 8-pin PIC12F1822 microcontroller is used to implement the charging algorithm. In

addition, the PIC12F1822 firmware supervises the battery voltage and current.

1.2 BOARD FEATURES

The MCP1632 Single-Cell Li-Ion Battery Charger Demo Board has the following

features:

• Compact size, highly efficient battery charger

• Can operate in Buck (step-down) or Boost (step-up) mode

• Maximum output current: 1500 mA; can be adjusted via firmware

• Chemistry-optimized charging algorithm

• Maximum output power: 7W

• Factory-programmed source code provided

• Additional application functions can be implemented in the firmware

1.3 DEVICE SUMMARY

The MCP1632 Single-Cell Li-Ion Battery Charger Demo Board uses the following

primary devices on the board:

• MCP1632 high-speed current mode PWM controller. – When used in conjunction

with a microcontroller, the MCP1632 will control the power system duty cycle to

provide output current and/or voltage regulation.

• PIC12F1822 microcontroller (8-bit MCU) – Used to implement the charging algo-

rithm and to provide additional software functions like protections.

• MCP1703 low dropout regulator (LDO) – Used to supply regulated voltage (+5V)

to the PIC12F1822 microcontroller and the MCP1632 PWM controller

• MCP6021 operational amplifier – Used for the current sensing circuit.

MCP1632 Single Cell Li-Ion Battery Charger Demo Board User’s Guide

DS50002321A-page 10 2014 Microchip Technology Inc.

1.4 TECHNICAL SPECIFICATIONS

• Input voltage: +4.5V to +12V

• Load disconnect protection software configurable

• Typical output current: 1000 mA

• Maximum output current: 1500 mA (with firmware adjustments)

• Typical output power: 4.2W (maximum 7W at +25°C degree ambient temperature)

• Fully protected against Short-Circuit and No Load condition

• Figure 1-1 shows a simplified block diagram of the application

FIGURE 1-1: MCP1632 Block Diagram.

1.5 FUNCTIONAL DESCRIPTION

MCP1632 provides all the analog functions necessary to implement a stand-alone

switch-mode power converter. When combined with an external microcontroller, the

MCP1632 can be used to implement different intelligent converters like those

necessary for battery chargers.

The power train of this application uses the Single-Ended Primary Inductor Converter

(SEPIC) topology. This topology offers buck-boost functionality and also has

non-pulsating input current.

The converter provides constant voltage with limited current at the output, necessary

for certain battery charging applications (ex. Li-Ion-based batteries).

The output voltage is measured with a voltage divider resistor pair (R1, R5). This

voltage must be precisely 4.2V, required by the battery chemistry.

The average current in the L1B inductor, which is also the output current of the

converter, is sensed using a 0.1shunt resistor (RS). As the voltage across the shunt

resistor is negative, a -10x amplifier (U3) is used for battery charging current sensing.

The conversion gain of this circuit is 1V/A.

The PWM output available from the PIC12F1822 microcontroller is used to control the

reference voltage of the MCP1632 using the circuit created with D2 and R3 components.

Maximum output current is set by the PIC12F1822 microcontroller.

MCP1632

RVREF

CSS

VIN

VREF

COMP

VEXT

GND

VIN

LDO

RSENSE

RSLOPE

L1A

-CIN

COUT

L1B

C10 R9

R12

Battery

PIC12F1822

VSENSE

CSENSE

VSENSE

Status

AN1

AN2

PWM

I/O

VCC

R13

MCP6021

Autres manuels pour MCP1632

Ce manuel convient aux modèles suivants

Table des matières

Autres manuels Microchip Technology Carte mère

Microchip Technology

Microchip Technology MCP1663 Manuel utilisateur

Microchip Technology

Microchip Technology DM160223 Manuel utilisateur

Microchip Technology

Microchip Technology MCP212X Manuel utilisateur

Microchip Technology

Microchip Technology TC1303 DFN Manuel utilisateur

Microchip Technology

Microchip Technology PAC1934 Manuel utilisateur

Microchip Technology

Microchip Technology Microsemi PolarFire Manuel utilisateur

Microchip Technology

Microchip Technology HV2903 Manuel utilisateur

Microchip Technology

Microchip Technology PIC16F17146 CNANO Manuel d'installation

Microchip Technology

Microchip Technology SOT23-5 Manuel utilisateur

Microchip Technology

Microchip Technology ATF15 Series Manuel utilisateur

Microchip Technology

Microchip Technology BM83 EVB Manuel utilisateur

Microchip Technology

Microchip Technology EVB-KSZ8563 Manuel utilisateur

Microchip Technology

Microchip Technology HV2903 Manuel utilisateur

Microchip Technology

Microchip Technology dsPICDEM 1.1 Plus Manuel utilisateur

Microchip Technology

Microchip Technology MCP2221 Manuel utilisateur

Microchip Technology

Microchip Technology MCP73830L Manuel utilisateur

Microchip Technology

Microchip Technology Explorer 16 Manuel utilisateur

Microchip Technology

Microchip Technology EVB-USB5744 Manuel utilisateur

Microchip Technology

Microchip Technology EVB-SEC1210 Manuel utilisateur

Microchip Technology

Microchip Technology MIC38300 Manuel utilisateur

Microchip Technology

Microchip Technology Curiosity Nano Series Manuel d'installation

Microchip Technology

Microchip Technology SAM B11ZR Xplained Pro Manuel utilisateur

Microchip Technology

Microchip Technology ADM00902 Manuel utilisateur

Microchip Technology

Microchip Technology PIC16F15376 Curiosity Nano Manuel d'installation

Manuels Carte mère populaires d'autres marques

DFI

DFI SD170 Manuel utilisateur

ASROCK

ASROCK ROMED8-2T Manuel utilisateur

Asus

Asus P2L97A Manuel utilisateur

Winmate

Winmate IC70 Manuel utilisateur

Asus

Asus MES-B Manuel utilisateur

Grantech

Grantech SYS8F377VGGA-3OMN Manuel utilisateur

Telit Wireless Solutions

Telit Wireless Solutions SL869-3DR Manuel utilisateur

Gigabyte

Gigabyte GA-9IVDT Manuel utilisateur

Texas Instruments

Texas Instruments ADS8372EVM Manuel utilisateur

Commell

Commell MS-C73 Manuel utilisateur

IBT Technologies

IBT Technologies MB860 Manuel utilisateur

Nvidia

Nvidia TEGRA DG-04927-001_V01 Manuel utilisateur

Biostar

Biostar M7VIT Bravo Instructions d'utilisation et d'installation

Intel

Intel D33217CK Manuel utilisateur

Asus

Asus F1A55-M LX PLUS R2.0 Manuel utilisateur

EPC

EPC EPC9147C Manuel utilisateur

Asus

Asus EX-B760M-V5 D4 Manuel utilisateur

EPOX

EPOX MU-8KHA0010 Manuel utilisateur