MCP1630 Low-Cost NiMH Ref Design Datasheet by Microchip Technology

View All Related Products | Download PDF Datasheet
Q MICROCHIP
© 2007 Microchip Technology Inc. DS51648A
MCP1630
Low-Cost NiMH
Battery Charger
Reference Design
QUALITY MANAGEMENT SYSTEM CERTIFIED BY DNV = ISO/TS 1694922002 =
DS51648A-page ii © 2007 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and may be superseded by updates.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.
Trademarks
The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, KEELOQ, KEELOQ logo, microID, MPLAB, PIC,
PICmicro, PICSTART, PRO MATE, PowerSmart, rfPIC, and
SmartShunt are registered trademarks of Microchip
Technology Incorporated in the U.S.A. and other countries.
AmpLab, FilterLab, Linear Active Thermistor, Migratable
Memory, MXDEV, MXLAB, PS logo, SEEVAL, SmartSensor
and The Embedded Control Solutions Company are
registered trademarks of Microchip Technology Incorporated
in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, CodeGuard,
dsPICDEM, dsPICDEM.net, dsPICworks, ECAN,
ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,
In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi,
MPASM, MPLAB Certified logo, MPLIB, MPLINK, PICkit,
PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal,
PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB,
rfPICDEM, Select Mode, Smart Serial, SmartTel, 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.
© 2007, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
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-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona, Gresham, Oregon and Mountain View, California. 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.
6‘ MICROCHIP
MCP1630 LOW-COST NIMH BATTERY
CHARGER REFERENCE DESIGN
© 2007 Microchip Technology Inc. DS51648A-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................................................................................... 4
Chapter 1. Product Overview ....................................................................................... 5
1.1 Introduction ..................................................................................................... 5
1.2 What is the MCP1630 Low Cost NiMH Battery Charger Reference Design? 6
1.3 What the MCP1630 Low Cost NiMH Battery Charger Reference Design
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........................................................................................ 12
A.3 Board – Top Silk Layer ................................................................................. 13
A.4 Board – Top Metal Layer .............................................................................. 14
A.5 Board – Bottom Metal Layer ......................................................................... 15
Appendix B. Bill Of Materials (BOM) ......................................................................... 17
Appendix C. Demo Board Firmware .......................................................................... 19
C.1 Device Firmware Flowchart - Page 1 ........................................................... 19
C.2 Device Firmware Flowchart - Page 2 ........................................................... 20
Worldwide Sales and Service .................................................................................... 22
MCP1630 Low-Cost NiMH Battery Charger Reference Design
DS51648A-page iv © 2007 Microchip Technology Inc.
NOTES:
6‘ MICROCHIP
MCP1630 LOW-COST NIMH BATTERY
CHARGER REFERENCE DESIGN
© 2007 Microchip Technology Inc. DS51648A-page 1
Preface
INTRODUCTION
This chapter contains general information that will be useful to know before using the
MCP1630 Low-Cost NiMH Battery Charger 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 MCP1630 Low-Cost NiMH Battery Charger
Reference Design as a development tool. The manual layout is as follows:
Chapter 1. “Product Overview” – Important information about the MCP1630
Low-Cost NiMH Battery Charger Reference Design.
Chapter 2. “Installation and Opation” – Includes instructions on how to get
started with this user’s guide and a description of how to use the MCP1630
Low-Cost NiMH Battery Charger Reference Design.
Appendix A. “Schematic and Layouts” – Shows the schematic and layout
diagrams for the MCP1630 Low-Cost NiMH Battery Charger Reference Design.
Appendix B. “Bill Of Materials (BOM)” – Lists the parts used to build the
MCP1630 Low-Cost NiMH Battery Charger Reference Design.
Appendix C. “Demo Board Firmware” – Provides information about the
application firmware and source code.
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.
MPLAB® FIIe>Save
MCP1630 Low-Cost NiMH Battery Charger Reference Design
DS51648A-page 2 © 2007 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
© 2007 Microchip Technology Inc. DS51648A-page 3
RECOMMENDED READING
This user's guide describes how to use MCP1630 Low-Cost NiMH Battery Charger
Reference Design. Other useful documents are listed below. The following Microchip
documents are available and recommended as supplemental reference resources.
MCP1630/MCP1630V Data Sheet, "High-Speed, Microcontroller-Adaptable, Pulse
Width Modulator" (DS21896)
This data sheet provides detailed information regarding the MCP1630/MCP1630V
product family.
PIC12F683 Data Sheet, "8-Pin Flash-Based, 8-Bit CMOS Microcontrollers with
Nano Watt Technology” (DS41211)
This data sheet provides detailed information regarding the PIC12F683 product family.
AN960 Application Note, “New Components and Design Methods Bring
Intelligence to Battery Charger Applications (DS00960)
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
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
MCP1630 Low-Cost NiMH Battery Charger Reference Design
DS51648A-page 4 © 2007 Microchip Technology Inc.
DOCUMENT REVISION HISTORY
Revision A (February 2007)
Initial Release of this Document.
6‘ MICROCHIP
MCP1630 LOW-COST NIMH BATTERY
CHARGER REFERENCE DESIGN
© 2007 Microchip Technology Inc. DS51648A-page 5
Chapter 1. Product Overview
1.1 INTRODUCTION
The MCP1630 Low-Cost NiMH Battery Charger Reference Design is used to charge
three series cell NiMH or NiCd batteries. The board uses the MCP1630 high-speed
analog PWM and PIC12F683 to generate the charge algorithm for NiMH or NiCd
batteries.
The MCP1630 Low-Cost NiMH Battery Charger Reference Design is used to evaluate
Microchip’s MCP1630 in a SEPIC power converter application. As provided, the
MCP1630 Low-Cost NiMH Battery Charger Reference Design is capable of charging a
three series cell NiMH battery pack from an input voltage of 6V to 14V. The MCP1630
Low-Cost NiMH Battery Charger Reference Design provides a constant current charge
with preconditioning, cell temperature monitoring and battery pack fault monitoring.
Also, the charger provides a status or fault indication. The MCP1630 Low-Cost NiMH
Battery Charger Reference Design automatically detects the insertion or removal of a
battery pack.
This chapter covers the following topics.
What is the MCP1630 Low Cost NiMH Battery Charger Reference Design?
What the MCP1630 Low Cost NiMH Battery Charger Reference Design Kit
includes.
FIGURE 1-1: MCP1630 Low Cost NiMH Battery Charger Reference Design
Block Diagram.
6V to 14V
Power Supply
MCP1630 SEPIC
Battery Charger
+-
B+
B-
THERM
3 Cell NiMH
VOLTAGE
REGULATED
WALL CUBE
MCP1630 Low-Cost NiMH Battery Charger Reference Design
DS51648A-page 6 © 2007 Microchip Technology Inc.
1.2 WHAT IS THE MCP1630 LOW COST NIMH BATTERY CHARGER
REFERENCE DESIGN?
The MCP1630 Low-Cost NiMH Battery Charger Reference Design is a complete
stand-alone constant current battery charger for a three series cell NiMH or NiCd
battery pack. Different battery chemistries (i.e. Li-Ion batteries connected in series) can
be charged with minor modifications to the firmware or with the MCP1630 Low-Cost
NiMH Battery Charger Reference Design. This board utilizes Microchip’s MCP1630
(high-speed PIC® MCU PWM MSOP8), MCP6292 (Dual op-amp MSOP8), and
PIC12F683 (Flash MCU SOIC8). The input voltage range for the demo board is 6V to
14V. The output is capable of charging at a fast charge rate of 1.3A constant current.
An input terminal block is provided to apply the input voltage to the charger. An output
header is also provided as a means to connect the external battery pack or simulated
battery load and external 10K thermistor. A programming header is available for
updating the firmware contained in the PIC12F683.
1.3 WHAT THE MCP1630 LOW COST NIMH BATTERY CHARGER REFERENCE
DESIGN KIT INCLUDES
This MCP1630 Low Cost NiMH Battery Charger Reference Design kit includes:
The MCP1630 Low-Cost NiMH Battery Charger Reference Design Board,
(102-00127)
Analog and Interface Products Demonstration Boards CD-ROM (DS21912)
- MCP1630 Low-Cost NiMH Battery Charger Reference Design User’s Guide,
(DS51648)
6‘ MICROCHIP
MCP1630 LOW-COST NIMH BATTERY
CHARGER REFERENCE DESIGN
© 2007 Microchip Technology Inc. DS51648A-page 7
Chapter 2. Installation and Operation
2.1 INTRODUCTION
The MCP1630 Low-Cost NiMH Battery Charger Reference Design demonstrates
Microchip’s high-speed Pulse Width Modulator (PWM) (the MCP1630) used in a
battery charger application. When used in conjunction with a microcontroller, the
MCP1630 will control the power system duty cycle to provide output voltage or current
regulation. The PIC12F683 microcontroller can be used to regulate output voltage or
current, switching frequency and maximum duty cycle. The MCP1630 generates duty
cycle and provides fast overcurrent protection based off various external inputs.
External signals include the input oscillator, the reference voltage, the feedback voltage
and the current sense. The output signal is a square-wave pulse. The power train used
for the MCP1630 Low-Cost NiMH Battery Charger Reference Design is a Single-Ended
Primary Inductive Converter (SEPIC).The PIC12F683 microcontroller is programma-
ble, allowing the user to modify or develop their own firmware routines to further
evaluate the MCP1630 Low-Cost NiMH Battery Charger Reference Design in this
application.
2.2 FEATURES
The MCP1630 Low-Cost NiMH Battery Charger has the following features:
Programmed parameters - modified in firmware
Factory Settings:
- Preconditioning Charge Current =170 mA
- Preconditioning Threshold = 3V
- Constant Current Fast Charge = 1.35A
- Charge Termination based on delta - VBATT / delta time
- Charge Termination based on delta + TBATT / delta time, with external
thermistor installed
Top Off Charge Current = 130 mA for 1 Hour
Overvoltage protection (battery removed)
Overcharge protection to prevent damaging the battery
Overcurrent protection in the event of a shorted battery
Battery reversal protection
Input short circuit protection
Overtemperature protection to prevent the battery from reaching too high a tem-
perature during charge
Soft-start capability by holding the reference voltage low during power-up
The MCP1630 Low-Cost NiMH Battery Charger has the flexibility to optimize the
charging algorithm for new battery technology, different battery chemistries or
different battery pack configurations
Proprietary features can be added by modifying the firmware contained in the
PIC12F683
The factory-programmed source code is available
Ability to adapt to environmental effects, such as ambient temperature
MCP1630 Low-Cost NiMH Battery Charger Reference Design
DS51648A-page 8 © 2007 Microchip Technology Inc.
2.3 GETTING STARTED
The MCP1630 Low-Cost NiMH Battery Charger is fully assembled and tested for
charging three series cell NiMH batteries. The charge termination is based on a
negative slope in battery voltage or a positive slope in battery pack temperature, (when
external thermistor is installed). This board requires the use of an external voltage
source to charge the series connected batteries with a range of +6V to +14V input. An
external load and thermistor is also required to evaluate the charger reference design.
FIGURE 2-1: MCP1630 Low-Cost NiMH Battery Charger Reference Design
Charge Profile.
2.3.1 Power Input and Output Connection
2.3.1.1 POWERING THE MCP1630 LOW-COST NIMH BATTERY CHARGER
1. Apply the input voltage to the input terminal block, J1. The input voltage source
should be limited to the 0V to +14V range. For nominal operation the input
voltage should be between +6V and +14V.
2. Connect the positive side of the input source (+) to pin 1 of J1. Connect the
negative or return side (-) of the input source to pin 2 of J1. Refer to Figure 2-2.
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
Time (Minutes)
Battery Voltage (V)
Charge Current (A)
0
10
20
30
40
50
60
Temperature (C)
MlCFIOCHIP DOOOD D0000 Emma may 1 NiMH BA'I'I'ERY CHARGER REFERENCE DESIGN 102—00127
Installation and Operation
© 2007 Microchip Technology Inc. DS51648A-page 9
FIGURE 2-2: Setup Configuration Diagram.
2.3.1.2 APPLYING A LOAD TO THE MCP1630 LOW-COST NIMH BATTERY
CHARGER REFERENCE DESIGN
1. To apply a load to the MCP1630 Low-Cost Li-Ion Battery Charger, the positive
side of the load (B+) should be connected to pin 1 of J2. The negative side of the
load (B-) should be connected to pin 5 of J2. Care should be taken when using
electronic loads or ground referenced loads.
2. A thermistor referenced to (B-) in the battery pack should be utilized, recom-
mended EPCOS Inc. PN B57509m103A5. If a thermistor is not available or not
desired, a 10 kΩ resistor should be placed between pins 4 and 5 of the battery
header (J2).
3. The installed firmware will prevent the board from entering the 1.3A Fast Charge
mode, if the battery terminal voltage is less than 2V. During power-up, the board
will always trickle charge first, so using a purely resistive load will not work for
trickle and fast-charge current. The best way to evaluate the charger is to use a
three series cell NiMH 2,200 mA/hour batteries, or the recommended simulated
battery load. Refer to Figure 2-3 before applying a load to the MCP1630
Low-Cost NiMH Battery Charger Reference Design.
C1
R1 8 R1 9
R7
C6
C1 2
R8
R1 5
C7 R1 0
C8
C1 3 C1 4
R1 4
C4
J3
R1 R4
R1 7
D2
C9
R1 2
C5
R1 6
J1
R2 1
R9
R6
U2
C3C2 L1
R3
R2
J2
R1 3
R1 1
R5
U3
U4
C1 0
D1
Q1
Input +
Input - Battery
Header
Programming
Header
MCP1630 Low-Cost NiMH Battery Charger Reference Design
DS51648A-page 10 © 2007 Microchip Technology Inc.
FIGURE 2-3: Simulated Battery Load.
2.3.1.3 STATUS LED
1. The MCP1630 Low-Cost NiMH Battery Charger has an LED to indicate charge
status or fault status. Table 2-1 represents the state of the LED during various
states of the charge cycle.
2.3.1.4 PROGRAMMING
Header J3 is provided for in-system circuit programming.
TABLE 2-1: STATUS OUTPUT
CHARGE CYCLE STATE LED
Qualification OFF
Preconditioning ON
Constant Current Fast Charge ON
Top Off Charge ON
Charge Complete OFF
Safety Timer Fault Flashing (2 Hz, 50% duty cycle)
Cell Temperature Invalid Flashing (1 Hz, 50% duty cycle)
Battery Disconnected OFF
Input Power Removed OFF
1,000 µF
10V AL 2Ω
10W
VBAT+
VBAT-
+
-
Variable
Power Supply
0V - 6V
6‘ MICROCHIP
MCP1630 LOW-COST NIMH BATTERY
CHARGER REFERENCE DESIGN
© 2007 Microchip Technology Inc. DS51648A-page 11
Appendix A. Schematic and Layouts
A.1 INTRODUCTION
This appendix contains the following schematics and layouts for the MCP1630
Low-Cost NiMH Battery Charger Reference Design:
Board Schematic
Board – Top Silk Layer
Board – Top Metal Layer
Board – Bottom Silk Layer
Board – Bottom Metal Layer
. a , is #52: 2.25 2255 L 2 is 53.. 3; £525 k ESE n.1uauu_<¢ \nrsswns,="" 2»="" au="" 3="" .="" lg;="" ;="" ,oizxammmmioz="" é:="" ene;="" (.9="" wammu:="" m:="" :9="" 54="" gwgw="" ga="" 54="" a="" a="" «n="" a="" e="" .k="" sh="" g1;="" g="" és="" _="" (£259;="" 3m="" neh="" $31m="" m="" e="" q="" a="" x»?="" e="" s="" 7—”="" 2—0="" 5="" l—m="" 7—1“="" ham="" ”slm=".w" :33="" e:="" 35="" {25339="" e.="" m="">
MCP1630 Low-Cost NiMH Battery Charger Reference Design
DS51648A-page 12 © 2007 Microchip Technology Inc.
A.2 BOARD – SCHEMATIC
AK
5
8
3
4
6
7
1
2
A K
2
1
3
A
6
7
5
A
MICROCHIP EB BE -_ NiMH BA'I'I'ERY CHARGER REFERENCE DE$GN 102—00127
Schematic and Layouts
© 2007 Microchip Technology Inc. DS51648A-page 13
A.3 BOARD – TOP SILK LAYER
MCP1630 Low-Cost NiMH Battery Charger Reference Design
DS51648A-page 14 © 2007 Microchip Technology Inc.
A.4 BOARD – TOP METAL LAYER
104—00127—R1
Schematic and Layouts
© 2007 Microchip Technology Inc. DS51648A-page 15
A.5 BOARD – BOTTOM METAL LAYER
MCP1630 Low-Cost NiMH Battery Charger Reference Design
DS51648A-page 16 © 2007 Microchip Technology Inc.
NOTES:
6‘ MICROCHIP sonic“
MCP1630 LOW-COST NIMH BATTERY
CHARGER REFERENCE DESIGN
© 2007 Microchip Technology Inc. DS51648A-page 17
Appendix B. Bill Of Materials (BOM)
TABLE B-1: BILL OF MATERIALS (BOM)
Qty Reference Description Manufacturer Part Number
3 C1, C2, C4 10uF, X5R Ceramic, 25V, 1206 Panasonic®-ECG ECJ-3YB1E106M
1 C3 1uF, X7R Ceramic, 25V, 1206 Panasonic-ECG ECJ-3YB1E105K
5 C5, C10,
C12, C13
0.1uF, X7R Ceramic, 16V, 0805 Panasonic-ECG ECJ-2VB1C104K
2 C6, C7 1500pF, X7R Ceramic, 100V, 0805 Panasonic-ECG ECJ-2VB2A152K
1 C8 22pF, NPO Ceramic, 50V, 0805 Panasonic-ECG ECJ-2VC1H220J
2 C9, C14 1uF, X5R Ceramic, 16V, 0805 Panasonic-ECG ECJ-2FB1C105K
1 D1 3.0A, 30V Schottky Diode, SMA Toshiba CMS01 (TE12L)
1 D2 Green LED, 0805 Lumex® Opto SML-LXT0805GW-TR
1 J1 Connector Terminal Block, 2 Pos.,
2.54mm, TB254-2
Phoenix Contact 1725656
1 J2 Connector Header, 5 Pos., 2.54mm,
Friction Lock, HDR1X5-FL
Molex 22-23-2051
1 J3 Connector Header, 5 Pos., 2.54mm,
HDR1X5
Molex 22-03-2051
1 L1 10uH, Coupled Inductor, DRQ127 Coiltronics DRQ127-100
1 PCB RoHS Compliant Bare PCB,
MCP1630 Low-Cost NiMH Battery
Charger Reference Design
— 104-000127
1 Q1 N-Channel MOSFET, SOIC8 International Rectifier IRF7807V
4 R1, R2, R3,
R4
0.22, 1/4W, Chip Resistor, 1206 Panasonic-ECG ERJ-8RQFR22V
4R5, R7, R11,
R16, R18
10.0k, 1/10W, Chip Resistor, 0805 Panasonic-ECG ERJ-6ENF1002V
1 R6, R20 100k, 1/10W, Chip Resistor, 0805 Panasonic-ECG ERJ-6ENF1003V
1 R8 47.5k, 1/10W, Chip Resistor, 0805 Panasonic-ECG ERJ-6ENF4752V
5 R9, R10,
R14, R17,
R21
1.00k, 1/10W, Chip Resistor, 0805 Panasonic-ECG ERJ-6ENF1001V
2 R12, R13 422k, 1/10W, Chip Resistor, 0805 Panasonic-ECG ERJ-6ENF4223V
1 R15 ,R19 39.2k, 1/10W, Chip Resistor, 0805 Panasonic-ECG ERJ-6ENF3922V
1 U2 Dual Operational Amplifier 10MHz,
MSOP8
Microchip Technology Inc MCP6292-E/MS
1 U3 PWM Building Block, MSOP8 Microchip Technology Inc MCP1630-E/MS
1 U4 Enhanced FLASH Microcontroller,
SOIC8
Microchip Technology Inc PIC12F683-I/SN
1 U5 5.0V, 250mA, Voltage Regulator,
SOT23
Microchip Technology Inc MCP17025002E/CB
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.
MCP1630 Low-Cost NiMH Battery Charger Reference Design
DS51648A-page 18 © 2007 Microchip Technology Inc.
NOTES:
MICRDCHIP ‘5 EATT present? Tuner Expired ‘5 EATT presemv
MCP1630 LOW-COST NIMH BATTERY
CHARGER REFERENCE DESIGN
© 2007 Microchip Technology Inc. DS51648A-page 19
Appendix C. Demo Board Firmware
C.1 DEVICE FIRMWARE FLOWCHART - PAGE 1
For the latest copy of the MCP1630 Low-Cost NiMH Battery Charger Reference Design
firmware, visit our website at www.microchip.com.
FIGURE C-1: Firmware Flowchart, page 1.
START
Initialize Ports,
Is BATT
present?
No
Pre-Charge
ICHARGE = 170 ma
Yes
Is BATT
present?
ADC, PWM, etc.
No
Yes
Is BATT
> 3V
No
Timer
Expired
Yes Temp. Fault
Suspend Charge
Flash LED
Yes
Fast charge
Reset timers
ICHARGE = 1.3A
Is BATT
present?
No
Charge Fault
Terminate Charge
Flash LED
No Yes Yes
Is BATT
present?
No
Temp. out
of Range?
Temp. out
of Range?
Yes
No
No
Temp. Fault
Suspend Charge
Flash LED
Yes
Voltage
Termination
No Temp. out
of Range?
No Temp.
Termination Timer
Expired?
A
Temp. out
of Range?
No
No
Yes
Yes
No
Yes Yes
Yes
B
Turn On LED
Is EATT presem? Twmer Expwea?
Demo Board Firmware
© 2007 Microchip Technology Inc. DS51648A-page 20
C.2 DEVICE FIRMWARE FLOWCHART - PAGE 2
For the latest copy of the MCP1630 Low-Cost NiMH Battery Charger Reference Design
firmware, visit our website at www.microchip.com.
FIGURE C-2: Firmware Flowchart, page 2.
Is BATT
present?
Temp. Fault
Suspend Charge
Flash LED
Yes
Temp. out
of Range?
No
Timer
Expired?
Yes
Yes
Yes
A
B
Top Off Charge
ICHARGE = 130 mA
No No
Charge Complete Temp. out
of Range?
No
Turn LED OFF
Demo Board Firmware
© 2007 Microchip Technology Inc. DS51648A-page 21
NOTES:
Q ‘MICROCHIP AMERICAS ASIA/PACIFIC ASIA/PACIFIC EUROPE
DS51648A-page 22 © 2007 Microchip Technology Inc.
AMERICAS
Corporate Office
2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7200
Fax: 480-792-7277
Technical Support:
http://support.microchip.com
Web Address:
www.microchip.com
Atlanta
Duluth, GA
Tel: 678-957-9614
Fax: 678-957-1455
Boston
Westborough, MA
Tel: 774-760-0087
Fax: 774-760-0088
Chicago
Itasca, IL
Tel: 630-285-0071
Fax: 630-285-0075
Dallas
Addison, TX
Tel: 972-818-7423
Fax: 972-818-2924
Detroit
Farmington Hills, MI
Tel: 248-538-2250
Fax: 248-538-2260
Kokomo
Kokomo, IN
Tel: 765-864-8360
Fax: 765-864-8387
Los Angeles
Mission Viejo, CA
Tel: 949-462-9523
Fax: 949-462-9608
Santa Clara
Santa Clara, CA
Tel: 408-961-6444
Fax: 408-961-6445
Toronto
Mississauga, Ontario,
Canada
Tel: 905-673-0699
Fax: 905-673-6509
ASIA/PACIFIC
Asia Pacific Office
Suites 3707-14, 37th Floor
Tower 6, The Gateway
Habour City, Kowloon
Hong Kong
Tel: 852-2401-1200
Fax: 852-2401-3431
Australia - Sydney
Tel: 61-2-9868-6733
Fax: 61-2-9868-6755
China - Beijing
Tel: 86-10-8528-2100
Fax: 86-10-8528-2104
China - Chengdu
Tel: 86-28-8665-5511
Fax: 86-28-8665-7889
China - Fuzhou
Tel: 86-591-8750-3506
Fax: 86-591-8750-3521
China - Hong Kong SAR
Tel: 852-2401-1200
Fax: 852-2401-3431
China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
China - Shenzhen
Tel: 86-755-8203-2660
Fax: 86-755-8203-1760
China - Shunde
Tel: 86-757-2839-5507
Fax: 86-757-2839-5571
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
China - Xian
Tel: 86-29-8833-7250
Fax: 86-29-8833-7256
ASIA/PACIFIC
India - Bangalore
Tel: 91-80-4182-8400
Fax: 91-80-4182-8422
India - New Delhi
Tel: 91-11-4160-8631
Fax: 91-11-4160-8632
India - Pune
Tel: 91-20-2566-1512
Fax: 91-20-2566-1513
Japan - Yokohama
Tel: 81-45-471- 6166
Fax: 81-45-471-6122
Korea - Gumi
Tel: 82-54-473-4301
Fax: 82-54-473-4302
Korea - Seoul
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
Malaysia - Penang
Tel: 60-4-646-8870
Fax: 60-4-646-5086
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
Taiwan - Hsin Chu
Tel: 886-3-572-9526
Fax: 886-3-572-6459
Taiwan - Kaohsiung
Tel: 886-7-536-4818
Fax: 886-7-536-4803
Taiwan - Taipei
Tel: 886-2-2500-6610
Fax: 886-2-2508-0102
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
EUROPE
Austria - Wels
Tel: 43-7242-2244-39
Fax: 43-7242-2244-393
Denmark - Copenhagen
Tel: 45-4450-2828
Fax: 45-4485-2829
France - Paris
Tel: 33-1-69-53-63-20
Fax: 33-1-69-30-90-79
Germany - Munich
Tel: 49-89-627-144-0
Fax: 49-89-627-144-44
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
UK - Wokingham
Tel: 44-118-921-5869
Fax: 44-118-921-5820
WORLDWIDE SALES AND SERVICE
12/08/06

Products related to this Datasheet

REF DESIGN MCP1630 NIMH BATT CHG