Microchip Technology MCP1630 NiMH User Manual

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Page 1

MCP1630 NiMH

Battery Charger Demo Board

User’s Guide

Page 2

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.

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in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates.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.

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EELOQ, 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.

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Analog-for-the-Digital Age, Application Maestro, dsPICDEM, dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, Linear Active Thermistor, MPASM, MPLIB, MPLINK, MPSIM, 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.

Printed on recycled paper.

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 PICmicro 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.

8-bit MCUs, KEELOQ

code hopping devices, Serial

Page 3

MCP1630 NiMH BATTERY CHARGER

DEMO BOARD USER’S GUIDE

Table of Contents

Preface ........................................................................................................................... 1

Chapter 1. Product Overview ....................................................................................... 5

1.1 Introduction ..................................................................................................... 5

1.2 What is the MCP1630 NiMH Battery Charger Demo Board? ......................... 6

1.3 What the MCP1630 NiMH Battery Charger Demo Board 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 - Page 1 ......................................................................... 12

A.3 Board Schematic - Page 2 ......................................................................... 13

A.4 Board - Top Layer ...................................................................................... 14

A.5 Board - Bottom Layer ................................................................................. 15

A.6 Board - Mid-Layer 1 ................................................................................... 16

A.7 Board - Mid-Layer 2 ................................................................................... 17

Appendix B. Bill Of Materials (BOM) ......................................................................... 19

Appendix C. Evaluation Board Firmware .................................................................. 21

C.1 Device Firmware .......................................................................................... 21

Worldwide Sales and Service .................................................................................... 24

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MCP1630 NiMH Battery Charger Demo Board User’s Guide

NOTES:

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MCP1630 NiMH BATTERY CHARGER

DEMO 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. 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 Select the Help menu, and then Topics to open a list of available on-line help files.

IDE on-line help.

INTRODUCTION

This chapter contains general information that will be useful to know before using the MCP1630 NiMH 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

• Document Revision History

DOCUMENT LAYOUT

This document describes how to use the MCP1630 NiMH Battery Charger Demo Board. The manual layout is as follows:

• Chapter 1. “Product Overview” – Important information about the MCP1630

NiMH Battery Charger Demo Board.

• Chapter 2. “Installation and Operation” – This chapter includes instructions on

how to get started, as well as a description of the MCP1630 NiMH Battery Charger Demo Board.

• Appendix A. “Schematic and Layouts” – Shows the schematic and layout

diagrams for the MCP1630 NiMH Battery Charger Demo Board.

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

MCP1630 NiMH Battery Charger Demo Board.

• Appendix C. “Evaluation Board Firmware” – Provides information about the

application firmware and where the source code can be found.

Page 6

MCP1630 NiMH Battery Charger Demo Board User’s Guide

CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic characters Referenced books MPLAB

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

Underlined, italic text with right angle bracket

Bold characters A dialog button Click OK

N‘Rnnnn A number in verilog format,

Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>

Courier New font:

Plain Courier New Sample source code #define START

Italic Courier New A variable argument file.o, where file can be

Square brackets [ ] Optional arguments mcc18 [options] file

Curly brackets and pipe character: { | }

Ellipses... Replaces repeated text var_name [,

A menu path File>Save

A tab Click the Power tab

where N is the total number of digits, R is the radix and n is a digit.

Filenames autoexec.bat File paths c:\mcc18\h Keywords _asm, _endasm, static Command-line options -Opa+, -Opa- Bit values 0, 1 Constants 0xFF, ‘A’

Choice of mutually exclusive arguments; an OR selection

Represents code supplied by user

“Save project before build”

4‘b0010, 2‘hF1

any valid filename

[options] errorlevel {0|1}

var_name...] void main (void)

{ ... }

IDE User’s Guide

Chapter 1. Product Overview

1.1 INTRODUCTION

The MCP1630 NiMH Battery Charger Demo Board is used to evaluate the Microchip MCP1630 used in a SEPIC power-converter application. The evaluation board is a complete stand-alone 4-cell NiMH battery charger that utilizes an 8V to 15V input capable of charging 4 NiMH batteries in series.

MCP1630 NiMH Battery Charger and Fuel Gauge Application Diagram

+8V to +15V Input Voltage

MCP1630 NiMH BATTERY CHARGER

DEMO BOARD USER’S GUIDE

SEPIC Converter

BATT

4 NiMH Cells

Linear

Regulator

BATT

+5V Bias

MCP1700

I2C™ Interface To System

3.0V

SOT-23

MCP1630

COMP

OSC IN

GND

REF

+5V Bias

PIC16LF818

PWM OUT

I/O

A/D

EXT

Cout

BATT

–

1:1

N-Channel MOSFET

–

A/D

1/2 MCP6042

A/D

1/2 MCP6042

TC1047A

FIGURE 1-1: NiMH Charger Block Diagram.

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MCP1630 NiMH Battery Charger Demo Board User’s Guide

1.2 WHAT IS THE MCP1630 NIMH BATTERY CHARGER DEMO BOARD?

The MCP1630 NiMH Battery Charger Demo Board is a complete stand-alone constant current battery charger and simple fuel gauge for four NiMH series batteries. This board utilizes Microchip’s MCP1630 (high-speed PIC MCP1700T (LDO Regulator SOT-23), MCP6042T (Op Amp MSOP-8), PIC16LF818 (MCU Flash SSOP-20), TC54 (Voltage Detector SOT-23A) and TC1047A (Temp-Volt Converter SOT-23B). The input voltage range for the demo board is 8V to 15V. The output is capable of charging four NiMH batteries with up to 1.6V per cell at a fast charge rate of 500 mA contant current.

Input terminals are provided to apply an intput voltage to the charger. Output terminals are also provided as a way to connect the external NiMH batteries or a simulated battery load.

1.3 WHAT THE MCP1630 NIMH BATTERY CHARGER DEMO BOARD KIT

INCLUDES

This MCP1630 NiMH Battery Charger Demo Board Kit includes:

• The MCP1630 NiMH Battery Charger Demo Board

• MCP1630 NiMH Battery Charger Demo Board User’s Guide (DS51505)

• MCP1630 Data Sheet, “High-Speed, Microcontroller-Adaptable, Pulse Width Modulator” (DS21896)

MCU PWM MSOP-8),

Page 11

Chapter 2. Installation and Operation

2.1 INTRODUCTION

The MCP1630 NiMH Battery Charger Demo Board demonstrates Microchip’s MCP1630 high-speed Pulse Width Modulator (PWM) used in a smart battery charger application. The MCP1630 is a high-speed, microcontroller-adaptable PWM that, when used in conjunction with a microcontroller, will control the power system duty cycle to provide output voltage or current regulation. The PIC16LF818 microcontroller can be used to regulate output voltage or current, switching frequency and maximum duty cycle. The MCP1630 generates pulse-by-pulse duty cycle, provides fast overcurrent protection and utilizes variable external inputs. External signals include the input oscillator and the reference voltage. The power train signals include the current sense and the feedback voltage; the output signal is a square-wave pulse. The power train used for the MCP1630 NiMH Battery Charger Demo Board is a Single-Ended Primary Inductive Converter (SEPIC).

2.2 FEATURES

MCP1630 NiMH BATTERY CHARGER

DEMO BOARD USER’S GUIDE

The MCP1630 NiMH Battery Charger Demo Board has the following features:

• Programmed charge currents:

- Fast Charge = 500 mA

- Trickle Charge = 50 mA

- Top-Off Charge = 25 mA

• Overvoltage protection (battery removed)

• Overcharge protection to prevent the battery from becoming dangerously overcharged

• Overdischarge protection to prevent the battery from being damaged

• Overcurrent protection in the event of a shorted battery

• Battery reversal protection

• Input short circuit protection

• Fast charge termination if the battery or ambient temperature is too high

• Soft-start capability by holding the reference voltage low during power-up

• The MCP1630 NiMH Battery Charger Demo Board terminates charge by detecting a predefined change in voltage with respect to time, a specified temperature or specified elapsed time

• A simple fuel gauge that has a dual MCP6042 amplifier, a 1-channel sense voltage and a 1-channel sense current

• The MCP1630 NiMH Battery Charger Demo Board has the flexibility to optimize the charging algorithm for new battery technology and add proprietary features by coding the microcontroller

• Ability to adapt to environmental effects, such as ambient temperature

• Uses a very low standby current of 29 μA

Page 12

MCP1630 NiMH Battery Charger Demo Board User’s Guide

2.3 GETTING STARTED

The MCP1630 NiMH Battery Charger Demo Board is fully assembled and tested for charging four 1,000 mA/hour NiMH batteries in series from 3.2V to 6V in accordance with the recommended charge profile for NiMH batteries. This board requires the use of an external input voltage source (+8V to +15V) and external load (battery or simulated battery load). It is recommended that four NiMH cells connected in series to act as a load or the recommended simulated load be used.

2.3.1 Power Input and Output Connections

2.3.1.1 POWERING THE MCP1630 NiMH BATTERY CHARGER DEMO BOARD.

1. Apply the input voltage to the surface mount test points provided. The input voltage source should be limited to the 0V to +15V range. For normal operation, the input voltage should be between +8V and +15V. However, the input voltage must not exceed +15V maximum. The source current necessary to regulate the output voltage to 6.4V at 500 mA should be a minimum of approximately 800 mA.

2. Connect the positive side of the input source (+) to test point TP2. Connect the negative (or return side) (–) of the input source to the GND test point TP3. TP2 is located just above TP3 in the upper-left corner of the board.

2.3.1.2 APPLYING THE LOAD TO THE MCP1630 NiMH BATTERY CHARGER

DEMO BOARD.

1. To apply a load to the MCP1630 NiMH Battery Charger Demo Board, the positive side of the load (+) should be connected to test point TP1. The negative side of the load (–) should be connected to test point TP4. Care should be taken when using electronic or ground-referenced loads, and never connect TP4 to ground. The battery current sense is referenced in the return leg, so connecting TP4 to ground will short out the current sense. The typical charge current is 50 mA while the battery is in the Trickle Charge mode or the battery voltage is below 0.8V/cell. The current is typically 500 mA when the battery is in the Fast Charge mode and typically 25 mA when the battery is in the Top-off Charge mode. The charge current is automatically regulated by the MCP1630.

2. The code will prevent the board from entering the 500 mA Fast Charge mode if the battery terminal voltage is less than 3.2V (0.8V / Cell). During power up, the board will always trickle charge first, so using a purely resistive load will not work for trickle and fast charge currents. The best way to evaluate the charger is to use four series NiMH batteries or the recommended simulated battery load.

TP1

Charger

–

1,000 μF

10V Al

10Ω

5 Watt

4V Lab Supply

–

TP4

FIGURE 2-1: Simulated Battery Load.

Page 13

2.3.1.3 STATUS LEDS

Installation and Operation

The MCP1630 NiMH Battery Charger Demo Board has two LEDs. D

is a red LED that

is used to indicate when input power is available. When the +12V input is connected, D

will be illuminated. The other LED (D9) has two LEDs built into a SOT-23 package.

These can be off, red, green or both on (amber). To conserve energy, D

is never

illuminated when there is no input power. If both LEDs are off, that is an indication there is no power supplied to the board input.

Under normal power-up conditions, the charger will begin with a 50 mA trickle charge. The microcontroller will then check the status of the batteries to ensure that they are present, their temperature is within range and the series voltage is within specified charging limits. For visual LED charge status, a dual-color SOT-23 LED is used (D

-D

Status Indication Normal Charge Modes:

Normal Charge Mode

Board Status

Initial Trickle Charge (50 mA) ON (Solid) OFF

Fast Charge (500 mA) ON (Solid) ON (Solid)

Final Trickle Charge (50 mA) OFF ON (Solid)

Top Off Charge (25 mA) OFF ON (Solid)

Charge Complete (0 mA) OFF ON (Blinking, 1 sec)

Initial Trickle Charge (50 mA) ON (Solid) OFF

Status Indication for Fault Modes:

-D

Fault Mode Board Status Red LED Green LED

Overvoltage Initial (Restart Initiated)

Overvoltage (Persistent, Latched-off after 9 attempts)

Overcurrent ON Blinking OFF

Red LED Green LED

ON (Blinking) OFF

ON (Blinking Faster) OFF

With no input connected and 4 NiMH batteries used as a load, the MCP1630 NiMH Battery Charger Demo Board will consume approximately 29 μA from the battery.

A temperature sensor is provided for charge termination. The sensor (U2) is located on the back of the printed circuit board. To utilize this feature, batteries should be in physical contact with the temperature sensor.

Programming:

- J1 can be used as a Flash programming port to modify the code for prototype applications. The pinout of J1 matches the required pinout for the MPLAB

ICD 2 programmer.

Page 14

MCP1630 NiMH Battery Charger Demo Board User’s Guide

NOTES:

Page 15

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

This appendix contains the schematics and layouts for the MCP1630 NiMH Battery Charger Demo Board. The diagrams included in this appendix include:

• Board Schematic

• Board - Top Layer

• Board - Bottom Layer

• Board - Mid-Layer 1

• Board - Mid-Layer 2

MCP1630 NiMH BATTERY CHARGER

DEMO BOARD USER’S GUIDE

Page 16

MCP1630 NiMH Battery Charger Demo Board User’s Guide

A.2 BOARD SCHEMATIC - PAGE 1

(BACK)

Page 17

A.3 BOARD SCHEMATIC - PAGE 2

Schematic and Layouts

(BACK)

Page 18

MCP1630 NiMH Battery Charger Demo Board User’s Guide

A.4 BOARD - TOP LAYER

TOP LAYER

Page 19

A.5 BOARD - BOTTOM LAYER

Schematic and Layouts

Page 20

MCP1630 NiMH Battery Charger Demo Board User’s Guide

A.6 BOARD - MID-LAYER 1

Page 21

A.7 BOARD - MID-LAYER 2

Schematic and Layouts

MID2

Page 22

MCP1630 NiMH Battery Charger Demo Board User’s Guide

NOTES:

Page 23

MCP1630 NiMH BATTERY CHARGER

DEMO BOARD USER’S GUIDE

Appendix B. Bill Of Materials (BOM)

TABLE B-1: BILL OF MATERIALS (BOM)

Qty Reference Description Manufacturer Part Number

6 C1, C2, C4,

C10, C13, C22

8 C3, C5, C6,

C7, C14, C15, C17, C24

2 C8, C9 CAP CERAMIC 4.7UF 16V X5R 0805 Panasonic® - ECG ECJ-2FB1C475K

1 C11 CAP CERAMIC 470PF 50V NP0 0603 Panasonic - ECG ECJ-1VC1H471J

3 C12, C19, C20 CAP CER 1.0UF 10V 10% X5R 0603 Murata Electronics

2 C16,C21 CAP CERAMIC 22PF 50V NP0 0603 Kemet Electronics C0603C220J5GACTU

1 C18 CAP 10000PF 50V CERAMIC X7R 0603 Kemet Electronics C0603C103K5RACTU

1 C23 CAP CERAMIC 1UF 25V X5R 0805 Panasonic - ECG ECJ-2FB1E105K

1 D1 LED 660NM SUPER RED DIFF 0603SMD Lumex

1 D4 DIODE SWITCH 75V 200MW SOT-323 Diodes Inc. BAS16W-7

1 D5 DIODE SCHOTTKY 25V 1.0A MINI-2P Panasonic - SSG MA2YD2300L

2D6, D8 “Do Not Populate” SOT-323 — —

1 D7 DIODE SWITCH DUAL CC 50V SOT-23 ON Semiconductor

1 D9 LED DUAL RED/GREEN CLEAR SOT-23 Lumex Opto/

1 J1 CONN MOD JACK 6-6 R/A PCB 50AU AMP

1 J2 CONN HEADER VERT 3POS .100 TIN AMP/Tyco Electronics 640454-3

1 J3 CONN HEADER VERT 2POS .100 TIN AMP/Tyco Electronics 640454-2

1 Q1 HEX/MOS N-CH 20V 4.2A SOT-23 International Rectifier IRLML2502TR

1 Q3 MOSFET N-CH 30V 1.7A 3-SSOT Fairchild

2 R1, R2 RES 200 OHM 1/16W 1% 0603 SMD Panasonic - ECG ERJ-3EKF2000V

9 R3, R5, R6

R7, R8, R9 R10, R11, R12

1 R4 RES 2.49K OHM 1/16W 1% 0603 SMD Panasonic - ECG ERJ-3EKF2491V

5 R13, R14, R29,

R30, R37

1 R15 RES 20K OHM 1/16W .1% 0603 SMD Panasonic - ECG ERA-3YEB203V

1 R16 RES ZERO OHM 1/10W 5% 0603 SMD Panasonic - ECG ERJ-3GEY0R00V

2 R17, R34 RES 301K OHM 1/16W 1% 0603 SMD Panasonic - ECG ERJ-3EKF3013V

3 R18, R35, R36 RES 30.1K OHM 1/16W 1% 0603 SMD Panasonic - ECG ERJ-3EKF3012V

3 R19, R20, R27 RES 1.00K OHM 1/16W 1% 0603 SMD Panasonic - ECG ERJ-3EKF1001V

1 R21 RES .39 OHM 1/4W 1% 1206 SMD Panasonic - ECG ERJ-8RQFR39V

“Do Not Populate” DNP0603 — —

CAP .10UF 10V CERAMIC X7R 0603 Kemet® Electronics C0603C104K8RACTU

GRM188R61A105KA61

North America

Opto/

Components Inc.

/Tyco®

Electronics

Semiconductor

RES 47.5K OHM 1/16W 1% 0603 SMD Panasonic - ECG ERJ-3EKF4752V

“Do Not Populate” 0603 - -

SML-LX0603SRW-TR

BAV74LT1

SML-LX15IGC-RP-TR

5520470-3

NDS355AN

Page 24

MCP1630 NiMH Battery Charger Demo Board User’s Guide

TABLE B-1: BILL OF MATERIALS (BOM) (CONTINUED)

Qty Reference Description Manufacturer Part Number

1 R22 RES .15 OHM 1/8W 5% 0805 SMD Panasonic - ECG ERJ-6RSJR15V

1 R23 RES 4.3K OHM 1/16W .5% 0603 SMD Susumu Co Ltd RR0816P-432-D

1 R24 RES 243K OHM 1/16W 1% 0603 SMD Panasonic - ECG ERJ-3EKF2433V

1 R25 RES 150K OHM 1/16W 1% 0603 SMD Panasonic - ECG ERJ-3EKF1503V

1 R26 RES 16.0K OHM 1/16W .5% 0603 SMD Susumu Co Ltd RR0816P-163-D

1 R28 RES 10.0K OHM 1/16W 1% 0603 SMD Panasonic - ECG ERJ-3EKF1002V

1 R31 RES 107K OHM 1/16W 1% 0603 SMD Panasonic - ECG ERJ-3EKF1073V

2 R32, R33 RES 61.9K OHM 1/16W 1% 0603 SMD Panasonic - ECG ERJ-3EKF6192V

1 R38 RES 249 OHM 1/16W 1% 0603 SMD Panasonic - ECG ERJ-3EKF2490V

3 S1, S2, S3 SWITCH TACT 6MM 260GF SMT E-Switch, Inc. TL3301NF260QG

1 T1 8th-PAK SMT Dual Inductor BH Electronics

4 TP1, TP2, TP3,

TP4

1 U1 IC MCU FLASH 1KX14 EEPROM

1 U2 IC TEMP-VOLT CONV PREC SOT-23B Microchip Technology,

1 U3 High-Speed PIC PWM MSOP8 Microchip Technology,

1 U4 IC OPAMP 1UA 1.4V DUAL R-R 8MSOP Microchip Technology,

1 U5 IC VREG MINI 5V 50MA SOT-23 Zetex Inc. ZMR500FTA

1 U6 IC COMPARATOR R-R OUT SC-70-5 National

1 U7 IC LDO REG 250MA 3.0V SOT-23 Microchip Technology,

1 U8 IC VOLT DETECTOR 2.9V SOT23A Microchip Technology,

PC TEST POINT COMPACT SMT Keystone Electronics®5016

Microchip Technology,

20-SSOP

Inc.

Semiconductor

Inc.

L11-1016

PIC16LF818-I/SS

TC1047AVNBTR

MCP1630-E/MS

MCP6042T-I/MS

LMV7219M7

MCP1700T-3002E/TT

TC54VC2902ECB713

Page 25

Appendix C. Evaluation Board Firmware

C.1 DEVICE FIRMWARE

For the latest version of the MCP1630 NiMH Battery Charger Demo Board User’s Guide firmware, visit the Microchip web site at www.microchip.com.

Power-Up

Initialize:

Ports, Clocks, A/D,

PWM, IIC, and

Interrupts

Is Input

Present?

Trickle Charge:

Turn-on RED LED,

Start PWM, Soft-start

C/20 Rate

MCP1630 NiMH BATTERY CHARGER

DEMO BOARD USER’S GUIDE

Yes

Is Battery

> 3.2V ?

Sleep Mode

No Yes

Is Input

Present?

Fast Charge:

Turn-on GREEN

LED, C/2 Rate

Is Input

Present?

Yes

Is Battery

> 3.2V ?

Yes Yes

In Over-

voltage?

Is Input

Present?

Yes

In Over-

voltage?

No No

Full

Charge?

Yes

Timer

Expired?

Timer

Expired?

Yes

Hiccup Restart:

Stop PWM

Persistent?

Yes

BA D EC

FIGURE C-1: Firmware Flowcharge - Page 1.

Page 26

Evaluation Board Firmware

A B

Top-off Charge:

Turn-off RED LED,

C/20 Rate Followed

BSy C/40 Rate

Is Input

Present?

In Over-

voltage?

Recharge?

Timer

Expired?

Charge Complete:

Flash GREEN LED,

C/40 Rate

Yes

C ED

Yes

Fault:

Flash RED LED

Is Input

Present?

Is Input

Present?

Yes

Recharge?

Timer

Expired?

Yes

FIGURE C-2: Firmware Flowchart - Page 2.

Page 27

NOTES:

Evaluation Board Firmware

Page 28

WORLDWIDE SALES AND SERVICE

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

Alpharetta, GA Tel: 770-640-0034 Fax: 770-640-0307

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

San Jose

Mountain View, CA Tel: 650-215-1444 Fax: 650-961-0286

Toronto

Mississauga, Ontario, Canada Tel: 905-673-0699 Fax: 905-673-6509

ASIA/PACIFIC

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: 86-28-8676-6200 Fax: 86-28-8676-6599

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: 91-11-5160-8631 Fax: 91-11-5160-8632

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: 43-7242-2244-399 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

02/16/06

Page 29

Mouser Electronics

Authorized Distributor

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Microchip: MCP1630DM-NMC1