Microchip Technology MCP73871 Demo Board with Voltage Proportional Current Control User guide

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MCP73871

Demo Board

with Voltage Proportional

Current Control

User’s Guide

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MCUs and dsPIC® DSCs, KEELOQ

code hopping

MCP73871 DEMO BOARD WITH

VOLTAGE PROPORTIONAL CURRENT

CONTROL USER’S GUIDE

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

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

1.2 What is the MCP73871 Demo Board with Voltage Proportional Current

Control? .................................................................................................... 6

1.3 What the MCP73871 Demo Board with Voltage Proportional Current Control

kit Includes? .............................................................................................. 6

Chapter 2. Installation and Operation

2.1 Introduction ..................................................................................................... 7

2.2 Features ......................................................................................................... 7

2.3 Getting Started ............................................................................................... 8

Appendix A. Schematic and Layouts

A.1 Introduction .................................................................................................. 13

A.2 Board – Schematic ....................................................................................... 14

A.3 Board – Top Silk and Pads .......................................................................... 15

A.4 Board – Top Metal Layer ............................................................................. 16

A.5 Board – Bottom Layer .................................................................................. 17

Appendix B. Bill of Materials (BOM)

Worldwide Sales and Service .................................................................................... 20

MCP73871 Demo Board with Voltage Proportional Current Control User’s Guide

NOTES:

MCP73871 DEMO BOARD WITH

VOLTAGE PROPORTIONAL

CURRENT CONTROL 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 MCP73871 Demo Board with Voltage Proportional Current Control. 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 MCP73871 Demo Board with Voltage Proportional Current Control as a linear Li-Ion battery charge controller that can share a load. The manual layout is as follows:

• Chapter 1. “Product Overview” – Important information about the MCP73871

Demo Board with Voltage Proportional Current Control.

• 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 MCP73871 Demo Board with Voltage Proportional Current Control.

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

MCP73871 Demo Board with Voltage Proportional Current Control.

MCP73871 Demo Board with Voltage Proportional Current Control 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® 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

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)

{ ... }

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

Preface

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://support.microchip.com.

MCP73871 Demo Board with Voltage Proportional Current Control User’s Guide

DOCUMENT REVISION HISTORY

Revision B (November 2009)

Initial Release of this Document.

• Updated Section 2.2 “Features” with information on the Voltage Proportional

Current Control Input Voltage.

• Added footnote to Table 2-1.

• Updated Section 2.3.3 “Voltage Proportional Charge Control (VPCC) Function”.

• Added Section 2.3.3.1 “Example”.

Revision A (April 2009)

• Initial Release of this Document.

Chapter 1. Product Overview

System Load

Low

CE V

STAT2

SEL

STAT1

VPCC

PROG2

LBO

Single-Cell Li-Ion Battery

OUT

BAT

THERM

BAT_SENSE

PROG3

PROG1

1, 20

14, 15, 16

18, 19

10,11 (EP)

OUT

NTC

10 F

4.7 F

110 k

10 k

PROG3

PROG1

470

AC-DC Adapter

or USB Port

MCP73871

330 k

1.1 INTRODUCTION

The MCP73871 Demo Board with Voltage Proportional Current Control is designed to demonstrate Microchip's stand-alone linear Li-Ion battery charger with system power path and load sharing management control solution. The MCP73871 integrates the required elements to meet design challenges when developing new Li-Ion / Li-Polymer batteries powered products.

The MCP73871 requires minimum external components to power the system load and charge single cell Li-Ion batteries independently. When input power is absent or insufficient, the Li-Ion battery becomes the primary power source and supports the required system load current. The MCP73871 Demo Board with Voltage Proportional Current Control feature added is developed to assist engineers in reducing product design cycle and time by utilizing Microchip’s favorite stand-alone Li-Ion battery charger and system load sharing management controller.

This chapter provides an overview of the MCP73871 Demo Board with Voltage Proportional Current Control and covers the following topics:

• What is the MCP73871 Demo Board with Voltage Proportional Current Control?

• What the MCP73871 Demo Board with Voltage Proportional Current Control Kit includes?

MCP73871 DEMO BOARD WITH

VOLTAGE PROPORTIONAL

CURRENT CONTROL USER’S GUIDE

FIGURE 1-1: MCP73871 With System Power Path and Voltage Proportional Current Control (VPCC) Management Typical Application.

MCP73871 Demo Board with Voltage Proportional Current Control User’s Guide

1.2 WHAT IS THE MCP73871 DEMO BOARD WITH VOLTAGE PROPORTIONAL CURRENT CONTROL?

The MCP73871 Demo Board with Voltage Proportional Current Control demonstrates the features of Microchip’s MCP73871 “Stand-Alone System Load Sharing and Li-Ion / Li-Poly Battery Charge Management Controller”.The MCP73871 Demo Board with Voltage Proportional Current Control is designed to deliver minimum 1.5A total current to system load and to a single cell Li-Ion battery at 4.2V preset voltage regulation (4.1V,

4.35V and 4.4V options are also available for MCP73871). The MCP73871 Demo Board with Voltage Proportional Current Control has one dip switch (S1) with four poles to control input current limits, enable charge timer and enable charging. The first switch decides the input power source between AC-DC wall adapter and USB port (AC/USB). The second switch of S1 determines the 500 mA high-power USB port or the 100 mA low-power USB port (High/Low), if the first switch of S1 is enabled (ON). The input current limit is governed by the USB specification when selecting USB on S1 switch.

The maximum fast current when AC is selected on S1 is programmed by the resistor R (see Figure 1-1).

The MCP73871 Demo Board with Voltage Proportional Current Control offers three status LED (for charge status outputs and a power-good indicator).

at 1A, and the termination current is set at 100 mA by R

PROG1

PROG3

Note: Refer to Table 2-1 for charge status outputs and Figure 2-1 for charge

current setups.

The MCP73871 Demo Board with Voltage Proportional Current Control comes with a factory preset low-battery indicator (LBO) when input is absent. The preset value is

3.2V and STAT1 LED (Green) will turn ON if the battery voltage is below the threshold voltage.

The MCP73871 Demo Board with Voltage Proportional Current Control is designed to cover all the features of the MCP73871 device. A thermistor can be added at test points TP6 and TP7, but resistor R6 must be removed (see the A.2 “Board – Schematic”). The board layout easily permit to change the two programmable resistors: R R

PROG3

PROG1

1.3 WHAT THE MCP73871 DEMO BOARD WITH VOLTAGE PROPORTIONAL CURRENT CONTROL KIT INCLUDES?

This MCP73871 Demo Board with Voltage Proportional Current Control kit includes:

• One MCP73871 Demo Board with Voltage Proportional Current Control, 102-00244

• Important Information "Read First"

and

Chapter 2. Installation and Operation

2.1 INTRODUCTION

The MCP73871 Demo Board with Voltage Proportional Current Control demonstrates Microchip's standalone linear Li-Ion battery charger with system power path and load sharing management control solution. The system load is also powered by the Li-Ion battery when the input power is disconnected. A number of device options allow the MCP73871 to be utilized in a variety of applications. Please refer to the MCP73871 Data Sheet (DS22090) and/or contact local Microchip supports for additional device options.

Typical applications for the reference design are in Smart Phones, PDA, Portable Media Players, MP3 Players, Digital Cameras, Handheld Medical devices, Bluetooth headsets, Ultra-Mobile PC and Portable Communicators.

2.2 FEATURES

The MCP73871 Demo Board with Voltage Proportional Current Control has the following features:

• Integrated System Load Sharing

• Voltage Proportional Current Control (VPCC) Input voltage: 5.5V with ±0.5V tolerance (additional information available in the MCP73871 Data Sheet)

• Input Current Limit Control hardware selected (typical 1650 mA, USB-High maximum 500 mA, and USB-Low maximum 100 mA)

• Three LEDs to indicate charge status, low battery and power good signal

• Preset Li-Ion battery charge voltage: 4.2V ± 0.5%

• Temperature monitoring is disabled by default, but can be enabled to use with a NTC thermister (tied at TP6 and TP7 and removing R6)

• Factory preset 0.1C preconditioning current of deeply depleted cells

• Factory preset Safety Timer with Timer Enable feature (by S1 switch)

• Constant Current/Constant Voltage (CC/CV) charge algorithm

• Resistor programmed maximum charge current (R

• Resistor programmed termination set point (R

• Automatic Charge Termination

• Automatic Recharge

• Internal Thermal Regulation

• Exposed Pad with extra via underneath for better heat dissipations

MCP73871 DEMO BOARD WITH

VOLTAGE PROPORTIONAL

CURRENT CONTROL USER’S GUIDE

): 1A

PROG1

): 100 mA

PROG3

MCP73871 Demo Board with Voltage Proportional Current Control User’s Guide

2.3 GETTING STARTED

The MCP73871 Demo Board with Voltage Proportional Current Control is fully assembled and tested for charging a single-cell Li-Ion or Li-Polymer battery with or without system load.

2.3.1 Power Input and Output Connection

2.3.1.1 POWERING THE MCP73871 DEMO BOARD WITH VOLTAGE PROPORTIONAL CURRENT CONTROL

1. Connect the positive battery terminal to V

+ (TP4) and negative battery

BAT

terminal to GND (TP1 or TP5).

2. Connect the 5V – 6V DC power supply Negative Terminal to GND (TP1 or TP5).

3. Connect the 5V – 6V DC power supply Positive Terminal to V

(TP2).

4. Connect positive of load to OUT (TP3) on the board and negative of load to GND

(TP1 or TP5). The system load can be a power resistor or E-Load.

5. The maximum current that system load requires should not violate the

specification of Li-Ion battery manufacturer (typical at 1C or less) or 1A for safety and performance concerns.

6. You should initiate the battery charging cycle when turning CE switch of S1 OFF.

Turning the CE switch ON disables the Li-Ion battery charger function.

7. The S1 switch #1 in OFF position (SEL - “AC-DC”) allows maximum input current

of 1.8A to support both system load and Li-Ion battery charger at 1000 mA fast charge current rate.

8. The S1 switch #1 in ON position (SEL - “USB”) limits the input current to meet

USB specifications.

9. If switch SEL is in ON position (PROG2), the user has two options for switch #2:

- OFF - limits the total input current to 500 mA

- ON - for maximum input current at 100 mA.

Note 1: For setup/configuration follow the information in Table 2-2.

2: Fast Charge Current and Termination Current can be easily programmed

with various resistors based on Figure 2-1.

3: The Li-Ion battery pack can be replaced with test circuit or electronic load

that can sink current with DC power supply. Refer to Figure 2-2 for details.

10. If DC power is removed, the load should be supported by the Li-Ion battery.

2.3.2 Programming Resistors

The resistors that connected at R current in constant current mode from ac-dc adapter and termination current, respectively. The relationship between fast charge current and value of R resistor is illustrated in Figure 2-1. The correspondence of R Demo Board with Voltage Proportional Current Control is R which sets the maximum charge current at 1A.

For R

, the correspondent resistor is R2. A 10 k resistor sets the charge

PROG3

termination current at 100 mA and a 100 k value results a 10 mA termination point. Read carefully the additional information on the schematic in A.2 “Board – Sche- matic”. The boards comes with R

PROG1

=10 k.

and R

pins select the maximum charge

PROG3

on MCP73871

PROG1

. The default value is 1 k,

PROG1

Installation and Operation

100

200

300

400

500

600

700

800

900

1000

1 3 5 7 9 1113151719

Programming Resistor (kΩ)

Charge Current (mA)

0V – 5V

Power

Source

Microchip

Battery Charge

Management

Controller

BAT

Amp

Meter

Volt

Meter

5

10W

100 F

GND

FIGURE 2-1: MCP73871 Charge Current (I (R

FIGURE 2-2: Simulated Battery Load.

PROG1

) vs. Programming Resistor

OUT

MCP73871 Demo Board with Voltage Proportional Current Control User’s Guide

Resistive Load

E-Load

5V DC

Power Supply

min 2A

Battery or

Battery

Emulation

Circuit

FIGURE 2-3: MCP73871 Top Board and Application Circuit.

TABLE 2-1: MCP73871 CHARGE STATUS OUTPUTS

Charge Cycle State STAT1 (Green) STAT2 (Red) PG (Blue)

Shutdown OFF OFF OFF

Standby OFF OFF ON

Charge in Progress ON OFF ON

Charge Complete (EOC) OFF ON ON

Temperature Fault ON ON ON

Timer Fault ON ON ON

Low Battery Indicator (LBO) ON OFF OFF

No Battery Present OFF OFF ON

No Input Power OFF OFF OFF

Note: LED Status Outputs are given for the battery connected at V

TABLE 2-2: MCP73871 DEMO BOARD DIP SWITCH CONFIGURATION

Switch # / Name

1 / SEL AC-DC Adapter Power from USB —

2 / PROG2 USB maximum 500 mA USB max 100 mA Only if SEL is ON

3 / TE

4 / CE Charge is enabled Charge function OFF CE = Chip Enable

Timer Enable OFF Timer Enable activated Factory preset at 4h, 6h and 8h

OFF ON

State / Function

Observations

and GND.

BAT

Installation and Operation

VPCC

R7 R8+

-------------------- -

DDmin

1.23V

110k

110k R8+

------------------------- -

4.5V

R8 292.43k

0.5

1.5

2.5

3.5

4.5

3.5 4 4.5 5 5.5 Input Voltage (V)

Battery Volatge (V)

VPCC pin Voltage (V)

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

Input Current (A)

BAT

VPCC

2.3.3 Voltage Proportional Charge Control (VPCC) Function

If the input voltage drops to a preset value, determined by the threshold established at the VPCC input (1.23V at pin #2), due to a limited amount of input current or input source impedance, the battery charging current is reduced. The VPCC control tries to reach a steady state condition where the system load has priority and the battery is charged with the remaining current. Therefore, if the system demands more current that the input can provide, the MCP73871 changes its status and the battery is able to supplement the input current to the system load.

The VPCC function sustains the system load as its highest priority. It does this by reducing the noncritical charge current while maintaining the maximum power output of the adapter. Further demand from the system is supported by the battery, if possible. The VPCC feature functions are identical for USB port or AC-DC adapter inputs. This feature can be disabled by removing resistor R 0603 resistor.

The demo board is designed to operate with 5.5V with +/-0.5V tolerance input voltage, by setting accordingly the voltage on VPCC pin by R7 and R8 resistors (see A.2 “Board – Schematic”). Additional information on the configuration of the VPCC function is available in the MCP73871 Data Sheet.

2.3.3.1 EXAMPLE

A system is designed with a 5.0V rated DC power supply with ±0.5V tolerance. The worst condition of 4.5V is selected, which is used to calculate the VPCC supply voltage with divider. The voltage divider equation is shown below:

and replacing R8 with a zero ohms

The calculated R resistor is selected for R

Figure 2-4 illustrates the influence of various input voltages.

FIGURE 2-4: Input and Output Parameters when Input Voltage is Variable, from 2.5V to 5.5V. See the Influence of VPCC Pin.

equals to 292.43 k when 110 k is selected for R7. The 294 k

to build the voltage divider for VPCC pin.

MCP73871 Demo Board with Voltage Proportional Current Control User’s Guide

0 25 50 75 100 125 150

Time (min)

Battery Volatge (V)

(°C)

0.2

0.4

0.6

0.8

Charge Current (A)

BAT

Cell Temperature / 10

Charge

2.3.4 Temperature Monitoring Option

The MCP73871 device monitors continuously the battery temperature during a charge cycle by measuring the voltage between the THERM and V source provides the bias for most common 10 k negative-temperature coefficient thermistors (NTC). The MCP73871 device compares the voltage at the THERM pin to factory set thresholds of 1.24V and 0.25V, typically. Once a voltage outside the thresholds is detected during a charge cycle, the MCP73871 device immediately suspends the charge cycle, by turning off the charge and holding the timer value. The charge cycle resumes when the voltage at the THERM pin returns to the normal range.

To activate this feature, remove R6 resistor and connect a 10 k NTC thermistor to TP6 and TP7 test points.

pins. An internal current

Cell Temperature / 10

FIGURE 2-5: MCP73871 Charge Profile in Constant Voltage Mode for a 900 mAh Li-Ion Cell.

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

This appendix contains the following schematics and layouts for the MCP73871 Demo Board with Voltage Proportional Current Control:

• Board – Schematic

• Board – Top Silk and Pads

• Board – Top Metal Layer

• Board – Bottom Layer

MCP73871 DEMO BOARD WITH

VOLTAGE PROPORTIONAL

CURRENT CONTROL USER’S GUIDE

MCP73871 Demo Board with Voltage Proportional Current Control User’s Guide

A.2 BOARD – SCHEMATIC

A.3 BOARD – TOP SILK AND PADS

Schematic and Layouts

MCP73871 Demo Board with Voltage Proportional Current Control User’s Guide

A.4 BOARD – TOP METAL LAYER

A.5 BOARD – BOTTOM LAYER

Schematic and Layouts

MCP73871 Demo Board with Voltage Proportional Current Control User’s Guide

NOTES:

MCP73871 DEMO BOARD WITH

VOLTAGE PROPORTIONAL

CURRENT CONTROL USER’S GUIDE

Appendix B. Bill of Materials (BOM)

TABLE B-1: BILL OF MATERIALS (BOM)

Qty Reference Description Manufacturer Part Number

3 C1, C2, C3 CAP CERAMIC 4.7 uF 10 X5R 0603 Taiyo Yuden

1 LED1 True Green Water Clear 0603 SMD

LED

1 LED2 Super Red Water Clear 0603 SMD

LED

1 LED3 Blue Water Clear 0603 SMD LED Para Light USA L-C191LBCT-U1

1 PCB RoHS Compliant Bare PCB,

MCP73871 Demo Board w/ Voltage Proportional Current Control

4 R1, R3, R4, R5 RES 1K OHM 1/10W 1% 0603 SMD Panasonic

2 R2, R6 RES 10K OHM 1/10W 1% 0603 SMD Panasonic - ECG ERJ-3EKF1002V

5 R7, R9, R10,

R11, R12

1 R8 RES 330K OHM 1/10W 5% 0603

1 S1 SWITCH DIP TAPE SEALED 4POS

5 TP1, TP2, TP3,

TP4, TP5

1 U1 Stand-Alone System Load Sharing

4 Bump BUMPON HEMISPHERE .44X.20

RES 110K OHM 1/10W 1% 0603 SMD

SMD

PC Test Point Compact SMT Keystone

and Li-Ion / Li-Polymer Battery Charge Management Controller

WHITE

Para Light USA L-C191LGCT-U1

Para Light USA L-C191KRCT-U1

Advanced Circuits 104-00244

Panasonic - ECG ERJ-3EKF1103V

Panasonic - ECG ERJ-3GEYJ334V

C&K Components SDA04H0SB

Electronics

Microchip Technology Inc.

3M SJ5003-9-ND

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.

- ECG ERJ-3EKF1001V

LMK107BJ475KA-T

5016

MCP73871-2CCI/ML

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

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

Cleveland

Independence, OH Tel: 216-447-0464 Fax: 216-447-0643

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 Harbour 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 - Hong Kong SAR

Tel: 852-2401-1200 Fax: 852-2401-3431

China - Nanjing

Tel: 86-25-8473-2460 Fax: 86-25-8473-2470

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 - Wuhan

Tel: 86-27-5980-5300 Fax: 86-27-5980-5118

China - Xiamen

Tel: 86-592-2388138 Fax: 86-592-2388130

China - Xian

Tel: 86-29-8833-7252 Fax: 86-29-8833-7256

China - Zhuhai

Tel: 86-756-3210040 Fax: 86-756-3210049

ASIA/PACIFIC

India - Bangalore

Tel: 91-80-3090-4444 Fax: 91-80-3090-4080

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 - Daegu

Tel: 82-53-744-4301 Fax: 82-53-744-4302

Korea - Seoul

Tel: 82-2-554-7200 Fax: 82-2-558-5932 or 82-2-558-5934

Malaysia - Kuala Lumpur

Tel: 60-3-6201-9857 Fax: 60-3-6201-9859

Malaysia - Penang

Tel: 60-4-227-8870 Fax: 60-4-227-4068

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: 886-3-6578-300 Fax: 886-3-6578-370

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

03/26/09

Microchip Technology MCP73871 Demo Board with Voltage Proportional Current Control User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Preface

INTRODUCTION

DOCUMENT LAYOUT

CONVENTIONS USED IN THIS GUIDE

RECOMMENDED READING

THE MICROCHIP WEB SITE

CUSTOMER SUPPORT

DOCUMENT REVISION HISTORY

Chapter 1. Product Overview

1.1 INTRODUCTION

1.2 WHAT IS THE MCP73871 DEMO BOARD WITH VOLTAGE PROPORTIONAL CURRENT CONTROL?

1.3 WHAT THE MCP73871 DEMO BOARD WITH VOLTAGE PROPORTIONAL CURRENT CONTROL KIT INCLUDES?

Chapter 2. Installation and Operation

2.1 INTRODUCTION

2.2 FEATURES

2.3 GETTING STARTED

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

A.2 BOARD – SCHEMATIC

A.3 BOARD – TOP SILK AND PADS

A.4 BOARD – TOP METAL LAYER

A.5 BOARD – BOTTOM LAYER

Appendix B. Bill of Materials (BOM)

WORLDWIDE SALES AND SERVICE