Microchip Technology MCP1650 Bedienungsanleitung

2004 Microchip Technology Inc. DS51462A

MCP1650/1/2/3

Evaluation Board

User’s Guide

DS51462A-page ii 2004 Microchip Technology Inc.

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• 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

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MMCP1650/1/2/3 EVALUATION

BOARD USER’S GUIDE

2004 Microchip Technology Inc. DS51462A-page iii

Table of Contents

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

Chapter 1. Product Overview ........................................................................................ 3

1.1 Introduction and Highlights ........................................................................ 3

1.2 What the MCP1650 Boost Controller Evaluation Board Is ....................... 3

1.3 What the MCP1650 Boost Controller Evaluation Board Includes ............. 3

Chapter 2. Installation and Operation .......................................................................... 5

2.1 Introduction ............................................................................................... 5

2.2 Features ................................................................................................... 5

2.3 Getting Started ......................................................................................... 5

Appendix A. Schematic and Layouts .......................................................................... 9

A.1 Introduction ............................................................................................... 9

A.2 Highlights .................................................................................................. 9

A.3 Board Schematic .................................................................................. 11

A.4 Board - Top Assembly .......................................................................... 12

A.5 Board - Top Layer ................................................................................. 13

A.6 Board - Bottom Layer ............................................................................ 14

Appendix B. Bill Of Materials (BOM) ......................................................................... 15

Worldwide Sales and Service .................................................................................... 16

MCP1650/1/2/3 Evaluation Board User’s Guide

DS51462A-page iv 2004 Microchip Technology Inc.

NOTES:

MMCP1650/1/2/3 EVALUATION

BOARD USER’S GUIDE

2004 Microchip Technology Inc. DS51462A-page 1

Preface

INTRODUCTION AND HIGHLIGHTS

This section contains general information that will be useful to know prior to using the

MCP1650 Boost Controller Evaluation Board. This board supports the

MCP1650/51/52/53 device family.

This section covers the following topics:

• About this Guide

• Recommended Reading

• The Microchip Internet Web Site

• Customer Support

ABOUT THIS GUIDE

Document Layout

The User’s Guide layout is as follows:

•Chapter 1: Product Overview – Important information about the MCP1650 Boost

Controller Evaluation Board.

•Chapter 2: Installation and Operation – This chapter includes instructions on

how to get started with this demo board and a detailed description of each

function of the demo board.

Appendices:

•Appendix A: Schematic and Layouts – shows the schematic and layout

diagrams for the MCP1650 Boost Controller Evaluation Board.

•Appendix B: Bill of Materials – lists the parts (and their respective

manufacturers) used to build the MCP1650 Boost Controller Evaluation Board.

•Worldwide Sales and Service – gives the address, telephone and fax number

for Microchip Technology Inc. sales and service locations throughout the world.

MCP1650/1/2/3 Evaluation Board User’s Guide

DS51462A-page 2 2004 Microchip Technology Inc.

recommended reading:

MCP1650/51/52/53 Data Sheet, (DS21876)

This data sheet provides detailed information regarding the MCP1650/51/52/53

product family.

THE MICROCHIP INTERNET WEB SITE

Microchip provides easy access to our documentation and on-line support through our

World Wide Web Site at www.microchip.com. You can download files from the web site

or from our FTP site at ftp://ftp.microchip.com

CUSTOMER SUPPORT

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Field Application Engineer (FAE)

• Corporate Applications Engineer (CAE)

• Hot line

Customers should call their distributor, representative or field application engineer

(FAE) for support. Local sales offices are also available to help customers. See the

back cover for a listing of sales offices and locations.

Corporate applications engineers (CAEs) may be contacted at:

• (480) 792-7627.

In addition, there is a Systems Information and Upgrade Line. This line provides system

users a listing of the latest versions of all of Microchip's development systems software

products. Plus, this line provides information on how customers can receive any

currently available upgrade kits.

The Hot Line Numbers are:

• 1-800-755-2345 for U.S. and most of Canada, and

• 1-480-792-7302 for the rest of the world

MMCP1650/1/2/3 EVALUATION

BOARD USER’S GUIDE

2004 Microchip Technology Inc. DS51462A-page 3

Chapter 1. Product Overview

1.1 INTRODUCTION AND HIGHLIGHTS

This chapter provides an overview of the MCP1650 Boost Controller Evaluation Board

and covers the following topics:

• What the MCP1650 Boost Controller Evaluation Board Is

• What the MCP1650 Boost Controller Evaluation Board includes

1.2 WHAT THE MCP1650 BOOST CONTROLLER EVALUATION BOARD IS

The MCP1650 Boost Controller Evaluation Board is used to evaluate and demonstrate

Microchip Technology’s MCP1650/51/52/53 Boost Controller product family. This

board uses the MCP1650/51/52/53 in two high-power, boost-converter applications.

The first application features the MCP1651 (8-pin MSOP) with the low battery detect

feature. The input voltage for the MCP1651 application is 2.8V to 4.8V, with the output

boosted to 5V. The second application uses the MCP1653 (10-pin MSOP), which

features both the low battery detect and power good features. The input voltage for this

application is 3.3V, with the output boosted to 12V.

1.3 WHAT THE MCP1650 BOOST CONTROLLER EVALUATION BOARD

INCLUDES

This MCP1650 Boost Controller Evaluation Board Kit includes:

• The MCP1650 Boost Controller Evaluation Board

• The MCP1650 Boost Controller Evaluation Board User’s Guide

• The MCP1650/51/52/53 Data Sheet

MCP1650/1/2/3 Evaluation Board User’s Guide

DS51462A-page 4 2004 Microchip Technology Inc.

NOTES:

MMCP1650/1/2/3 EVALUATION

BOARD USER’S GUIDE

2004 Microchip Technology Inc. DS51462A-page 5

Chapter 2. Installation and Operation

2.1 INTRODUCTION

The MCP1650 Boost Controller Evaluation Board is designed to demonstrate

Microchip’s family of high-frequency boost controllers. The product family consists of

four high-frequency, boost-converter devices having different combinations of features.

All devices in the family feature 750 kHz high-frequency, low quiescent current,

shutdown capability and the MSOP package. The MCP1650 8-pin MSOP is the base

device. The MCP1651 8-pin MSOP includes all of the features of the MCP1650, with

the addition of a low battery detect and low battery output (LBO) indicator. The

MCP1652 8-pin MSOP includes all of the features of the MCP1650, with the addition

of a power good (PG) indicator. The PG indicator is an open-drain output that is

high-impedance when the output voltage of the converter is within ±15% of its intended

regulation range. When the output of the regulator is not within the ±15% range, the PG

pin will sink up to 10 mA. The MCP1653 10-pin MSOP has all features; the LBO and

PG, along with the base features of the MCP1650.

2.2 FEATURES

The MCP1650 Boost Controller Evaluation Board has the following features:

• Evaluation of the MCP1651 in a boost application configured in the Bootstrap

mode. This application circuit will regulate the output to 5V while delivering 1A of

current as the input voltage varies from 2.8V to 4.8V.

• Evaluation of the MCP1653 in a boost application configured in the non-Bootstrap

mode. This application circuit will regulate the output voltage to 12V while

delivering 400 mA of output current as the input voltage varies from 3.0V to 3.6V.

2.3 GETTING STARTED

The MCP1650 Boost Controller Evaluation Board is fully assembled and tested for

evaluation and demonstration of the MCP1650 family of boost controllers. This board

requires the use of external lab supplies and loads. Both application circuits have a

fuse for input overcurrent protection. As with all boost converters, there is a path from

VIN to VOUT through the boost inductor and output diode. In the case of a shorted out-

put, there is no means of protecting the inductor and diode, so an external fuse is

provided.

MCP1651R Application Circuit

1. Powering the MCP1651 bootstrap application circuit:

- Apply the input voltage to the surface-mount test points provided. The input

voltage source should be limited to the 2.8V to 4.8V range to regulate the

5V output. The input voltage must not exceed the +5.5V maximum rating of

the MCP165X. The source current necessary to regulate the output voltage

to +5V at 1A should be approximately 3A.

- Connect the positive side of the input source (+) to the +VIN_1 test point

(TP1). Connect the negative, or return side, (-) of the input source to the

GND test point (TP4) located next to +VIN_1.

MCP1650/1/2/3 Evaluation Board User’s Guide

DS51462A-page 6 2004 Microchip Technology Inc.

- The Under Voltage Lockout (UVLO) feature will prevent the MCP1651 from

starting the converter until the input voltage is above the minimum thresh-

old. Once the input voltage is raised above the UVLO threshold, the

converter will begin to boost the output voltage up to 5V. The output voltage

is fed back to the input so that, once the Boost converter has started, it can

run down to lower input voltages at reduced load currents.

2. Applying the load to the MCP1651 bootstrap application circuit:

- To apply a load to the MCP1651 application circuit, the positive side of the

load (+) should be connected to the +VOUT_1 test point (TP2). The negative

side of the load should be connected to the GND test point (TP3). The

maximum load current should not exceed 1A while the input voltage is

within the range specified for this application (2.8V to 4.8V).

3. Using the shutdown feature of the MCP1651 application circuit:

- To shutdown the MCP1651, use a jumper wire to connect the SHDN test

point (TP5) to the GND test point (TP4). By grounding the shutdown pin, the

MCP1651 will enter the shutdown state and minimum quiescent current will

be drawn from the input source. To resume normal operation, remove the

jumper pin from the SHDN test point to ground and the MCP1651 will start.

4. Low Input Status LED:

- The MCP1651 has a low input voltage status indicator that will provide

visual indication (via a LED) when the input voltage is below 3V. This LED

will illuminate to provide a warning that the input voltage is approaching the

minimum 2.8V input voltage.

MCP1653S Application Circuit

1. Powering the MCP1653 non-bootstrap application circuit:

- Apply the input voltage to the surface-mount test points provided. The input

voltage source should be limited to the 3.0V to 3.6V range to regulate the

12V output. The input voltage must not exceed the +5.5V maximum rating

of the MCP165X. The source current necessary to regulate the output

voltage to +12V at 0.4A should be a minimum of approximately 3A.

- Connect the positive side of the input source (+) to the +VIN_2 test point

(TP6). Connect the negative, or return side, (–) of the input source to the

GND test point (TP8) located next to +VIN_2.

- The UVLO feature will prevent the MCP1653 from starting the converter

until the input voltage is above the minimum threshold. Once the input

voltage is raised above the UVLO threshold, the converter will begin to

boost the output voltage up to 12V. To maintain regulation of the 12V output,

the input voltage range should be between 3.0V and 3.6V.

2. Applying the load to the MCP1653 non-bootstrap application circuit:

- To apply a load to the MCP1653 application circuit, the positive side of the

load (+) should be connected to the +VOUT_2 test point (TP7). The negative

side of the load should be connected to the GND test point (TP10). The

maximum load current should not exceed 0.4A while the input voltage is

within the range specified for this application (3.0V to 3.6V).

3. Using the shutdown feature of the MC1653 application circuit:

- To shutdown the MCP1653, use a jumper wire to connect the SHDN test

point (TP9) to the GND test point (TP8). By grounding the shutdown pin, the

MCP1653 will enter the shutdown state and minimum quiescent current will

be drawn from the input source. To resume normal operation, remove the

jumper pin from the SHDN test point to ground and the MCP1653 will start.

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